Hypohalite Or Hypohalous Acid Patents (Class 423/473)
  • Patent number: 10122052
    Abstract: The present disclosure relates to systems and methods by which lead from spent lead-acid batteries may be extracted, purified, and used in the production of new lead-acid batteries. The system includes a first phase separation device configured to: receive the first mixture from the basic lead stream digestion device, isolate a liquid component from one or more insoluble components of the first mixture, and output the liquid component. The system also includes a lead salt precipitation device configured to: receive and mix the liquid component and a carboxylate source to form a second mixture including a lead salt precipitate, and output the second mixture. The system further includes a second phase separation device configured to: receive the second mixture from the lead salt precipitation device, isolate the liquid component from the lead salt precipitate of the second mixture, and output the lead salt precipitate.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: November 6, 2018
    Assignee: Johnson Controls Technology Company
    Inventors: Matthew A. Spence, Patrick M. Curran
  • Patent number: 9751067
    Abstract: The present disclosure relates to methods by which lead from spent lead-acid batteries may be extracted, purified, and used in the construction of new lead-acid batteries. A method includes: (A) forming a mixture including a carboxylate source and a lead-bearing material; (B) generating a first lead salt precipitate in the mixture as the carboxylate source reacts with the lead-bearing material; (C) increasing the pH of the mixture to dissolve the first lead salt precipitate; (D) isolating a liquid component of the mixture from one or more insoluble components of the mixture; (E) decreasing the pH of the liquid component of the mixture to generate a second lead salt precipitate; and (F) isolating the second lead salt precipitate from the liquid component of the mixture. Thereafter, the isolated lead salt precipitate may be converted to leady oxide for use in the manufacture of new lead-acid batteries.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: September 5, 2017
    Assignee: Johnson Controls Technology Company
    Inventor: Matthew A. Spence
  • Patent number: 9555386
    Abstract: The present disclosure relates generally to systems and methods for recycling lead-acid batteries, and more specifically, relates to purifying and recycling the lead content from lead-acid batteries. A system includes a reactor that receives and mixes a lead-bearing material waste, a carboxylate source, and a recycled liquid component to form a leaching mixture yielding a lead salt precipitate. The system also includes a phase separation device coupled to the reactor, wherein the phase separation device isolates the lead salt precipitate from a liquid component of the leaching mixture. The system further includes a closed-loop liquid recycling system coupled to the phase separation device and to the reactor, wherein the closed-loop liquid recycling system receives the liquid component isolated by the phase separation device and recycles a substantial portion of the received liquid component back to the reactor as the recycled liquid component.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: January 31, 2017
    Assignee: Johnson Controls Technology Company
    Inventors: Eberhard Meissner, Jürgen Bauer, Matthew A. Spence
  • Patent number: 9028604
    Abstract: Method of reducing the odor of sulphur-bound products, in particular modified sulphur or sulphur concrete, comprising contacting the sulphur-bound products with a bleaching agent, like e.g. sodium hydrochloride or hydrogen peroxide. The resulting sulphur-bound products emit reduced levels of sulphur-containing gases such as H2S and SO2 and have a reduced odor.
    Type: Grant
    Filed: December 5, 2010
    Date of Patent: May 12, 2015
    Assignee: Shell Oil Company
    Inventors: Gyula Imre Dreisziger, Cornelis Pieter Hamelink, Guy Lode Magda Maria Verbist
  • Patent number: 8877690
    Abstract: A method of treating a wastewater is provided and can be used, for example, to treat a gas well production wastewater to form a wastewater brine. The method can involve crystallizing sodium chloride by evaporation of the wastewater brine with concurrent production of a liquor comprising calcium chloride solution. Bromine and lithium can also be recovered from the liquor in accordance with the teachings of the present invention. Various metal sulfates, such as barium sulfate, can be removed from the wastewater in the production of the wastewater brine. Sources of wastewater can include gas well production wastewater and hydrofracture flowback wastewater.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: November 4, 2014
    Assignee: ProChemTech International, Inc.
    Inventor: Timothy Edward Keister
  • Publication number: 20140271451
    Abstract: The present invention relates to a process for purifying a gas stream comprising hydrogen sulfide or mercaptans, or mixtures thereof. The gas stream can be a sour natural gas stream, a landfill gas or an industrial gas stream. The process comprises contacting the gas stream at effective absorption conditions including an absorption temperature less than about 300° C. with a solid absorbent effective to absorb the hydrogen sulfide, or mercaptans or mixtures thereof to provide a purified gas stream. Method is useful for treating gas streams having up to 90 vol-% hydrogen sulfide, or treating highly pure hydrogen streams. The invention is useful as a guard bed for fuel cells and sensitive laboratory instruments. The invention can also be employed to treat steam reformer product hydrogen streams without the need for further compression of the product hydrogen streams.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: TERRAVIRE, CORP.
    Inventors: JAMES P. BUCCINI, WOLFGANG H. KOCH, RAYMOND C. STENGER, JAMES A. WASAS
  • Publication number: 20140110714
    Abstract: The present invention generally relates to an amorphous semiconductor material and TFTs containing the material. The semiconductor material contains a single cation, such as zinc, and multiple anions. For the multiple anions, only one of the anions can be oxygen or nitrogen. The anions compete with each other to twist the resulting structure. For example, if one of the anions bonded with the cation would result in a cubic structure, and another of the anions bonded with the cation would result in a hexagonal structure, the competing anions would twist the resulting structure so that the structure remains amorphous rather than crystalline. Further, because a single cation is utilized, there is no grain boundary and thus, the material has a high mobility.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 24, 2014
    Applicant: APPLIED MATERIALS, INC.
    Inventor: Yan YE
  • Patent number: 8623318
    Abstract: A method for continuous manufacture of higher-strength, lower-salt, aqueous sodium hypochlorite bleach from lower-strength aqueous sodium hypochlorite bleach that has some sodium hydroxide and that is essentially free of sodium chloride (salt) crystals, aqueous sodium hydroxide solution having a concentration by weight within a range from about 45% to about 51%, chlorine in gas and/or liquid phase that may or may not include inerts, and a recycle solution. Slurry is withdrawn from the tank at a level below where the lower-strength bleach, the sodium hydroxide solution, the chlorine, and the recycle solution begin to mix with slurry already in the tank. A first portion of the slurry is withdrawn and used as the recycle solution. A second portion of the slurry is withdrawn and processed to separate substantially all salt crystals from residual liquid that is recovered as the higher-strength lower-salt, aqueous sodium hypochlorite bleach.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: January 7, 2014
    Assignee: Powell Technologies LLC
    Inventors: Duane J Powell, Robert B. Bebow, Brent J. Hardman
  • Publication number: 20130216628
    Abstract: The invention generally relates to compositions of hypochlorous acid (HOCl) and methods of manufacture thereof. In certain aspects, the invention provides air-free compositions of HOCl. In other aspects, the invention provides methods of making HOCl that involve mixing together in water in an air-free environment, a compound that generates a proton (H+) in water and a compound that generates a hypochlorite anion (OCl?) in water to thereby produce air-free hypochlorous acid.
    Type: Application
    Filed: February 19, 2013
    Publication date: August 22, 2013
    Inventors: Bengt Olle Hinderson, Geir Hermod Almås
  • Patent number: 8491864
    Abstract: A method for continuous manufacture of higher-strength, lower-salt, aqueous sodium hypochlorite bleach from lower-strength aqueous sodium hypochlorite bleach that has some sodium hydroxide and that is essentially free of sodium chloride (salt) crystals, aqueous sodium hydroxide solution having a concentration by weight within a range from about 45% to about 51%, chlorine in gas and/or liquid phase that may or may not include inerts, and a recycle solution. Slurry is withdrawn from the tank at a level below where the lower-strength bleach, the sodium hydroxide solution, the chlorine, and the recycle solution begin to mix with slurry already in the tank. A first portion of the slurry is withdrawn and used as the recycle solution. A second portion of the slurry is withdrawn and processed to separate substantially all salt crystals from residual liquid that is recovered as the higher-strength lower-salt, aqueous sodium hypochlorite bleach.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: July 23, 2013
    Assignee: Powell Technologies LLC
    Inventors: Duane J Powell, Robert B. Bebow, Brent J. Hardman
  • Publication number: 20130048562
    Abstract: A method of treating a wastewater is provided and can be used, for example, to treat a gas well production wastewater to form a wastewater brine. The method can involve crystallizing sodium chloride by evaporation of the wastewater brine with concurrent production of a liquor comprising calcium chloride solution. Bromine and lithium can also be recovered from the liquor in accordance with the teachings of the present invention. Various metal sulfates, such as barium sulfate, can be removed from the wastewater in the production of the wastewater brine. Sources of wastewater can include gas well production wastewater and hydrofracture flowback wastewater.
    Type: Application
    Filed: August 31, 2011
    Publication date: February 28, 2013
    Applicant: PROCHEMTECH INTERNATIONAL, INC.
    Inventor: Timothy Edward KEISTER
  • Publication number: 20130052150
    Abstract: Method of reducing the odour of sulphur-bound products, in particular modified sulphur or sulphur concrete, comprising contacting the sulphur-bound products with a bleaching agent, like e.g. sodium hydrochloride or hydrogen peroxide. The resulting sulphur-bound products emit reduced levels of sulphur-containing gases such as H2S and SO2 and have a reduced odour.
    Type: Application
    Filed: December 5, 2010
    Publication date: February 28, 2013
    Inventors: Gyula Imre Dreisziger, Cornelis Pieter Hamelink, Guy Lode Magda Maria Verbist
  • Patent number: 8323595
    Abstract: There is provided a process for recovering high purity litharge PbO from spent lead acid battery paste at low temperatures and the further preparation of highly pure lead oxides and Pb(OH)2.
    Type: Grant
    Filed: September 3, 2011
    Date of Patent: December 4, 2012
    Assignee: Toxco, Inc.
    Inventors: W. Novis Smith, Steven A. Kinsbursky
  • Patent number: 8268284
    Abstract: A system (100) of the present invention for producing an iodine compound includes: a raw material adjusting unit (1) for supplying hydrogen-containing gas to at least one of liquid iodine in an iodine melting pot (4) and gaseous iodine obtained by evaporating liquid iodine so as to obtain a mixture gas; a hydrogen iodide producing unit (10) including a hydrogen iodide producing tower (12) having a catalyst layer (12a) for converting the introduced mixture gas into crude hydrogen iodide gas; a hydrogen iodide refining unit for removing unreacted iodine from the introduced crude hydrogen iodide gas so as to obtain hydrogen iodide gas; and an iodine compound producing unit (30) for producing a target iodine compound from the obtained hydrogen iodide gas and a reaction material. This allows producing an iodine compound with high purity easily, efficiently, and with low cost.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: September 18, 2012
    Assignee: Nippoh Chemicals Co., Ltd.
    Inventors: Satoshi Kanbe, Kazumi Hosono, Masahiro Wada
  • Publication number: 20120093944
    Abstract: The method for surface inclusions detection, enhancement of endothelial and osteoblast cells adhesion and proliferation and sterilization of electropolished and magnetoelectropolished Nitinol implantable medical device surfaces uses an aqueous solution of chemical compounds containing halogenous oxyanions as hypochlorite (ClO?) and hypobromite (BrO?) preferentially 6% sodium hypochlorite (NaClO).
    Type: Application
    Filed: December 1, 2011
    Publication date: April 19, 2012
    Inventor: Ryszard Rokicki
  • Patent number: 8158097
    Abstract: The present invention relates to a method for making pure salt comprises recapturing post-drilling flowback water from hydro-fracturing; removing oil from the flowback water; filtering the flowback water using an ultra filter with a pore size of about 0.1 microns or less to remove solid particulates and large organic molecules, such as benzene, ethylbenzene, toluene, and xylene, from the water; concentrating the flowback water to produce a brine that contains from about 15 wt % to about 40 wt % of salt relative to the total weight of the flowback brine; performing one or more chemical precipitation process using an effective amount of reagents to precipitate out the desired high quality commercial products, such as, barium sulfate, strontium carbonate, calcium carbonate; and crystallizing the chemically treated and concentrated flowback brine to produce greater than 99.5% pure salt products, such as sodium and calcium chloride.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: April 17, 2012
    Assignee: FracPure Holdings LLC
    Inventors: Frank A. DiTommaso, Peter N. DiTommaso
  • Publication number: 20110293505
    Abstract: It is intended to provide methods of producing a chlorine gas having a small bromine content, an aqueous sodium hypochlorite solution having a small bromic acid content, and liquid chlorine having a small bromine content. More specifically, a chlorine gas is produced by a method comprising the steps of: (A) washing a chlorine gas that contains bromine, in a gas washing unit composed of a packed column or a tray tower, wherein the chlorine gas introduced via a lower part of the gas washing unit is brought into counterflow gas/liquid contact with a liquid chlorine introduced via an upper part of the gas washing unit; and (B) taking out a purified chlorine gas thus washed, via the upper part of the gas washing unit, wherein a weight ratio of the chlorine gas and the liquid chlorine introduced in the step (A) is 1/1.0 to 1/0.3.
    Type: Application
    Filed: August 10, 2011
    Publication date: December 1, 2011
    Applicant: KANAKA CORPORATION
    Inventors: Yusaku ARIKI, Hironobu IBARAKI
  • Publication number: 20110135562
    Abstract: High concentrations of hypochlorous acid can be produced from, most typically, brine using an system of simple design with minimum residual salt production, reduced power consumption, and at high operating efficiencies. This is accomplished by separating the system into two operations, each of which is preferably optimized. This process employs at least two electrochemical cells, the first of which has no separator between the anode and cathode and generates a high-strength hypochlorite solution. The hypochlorite is then diluted to a desired chlorine concentration and/or pH and fed into the anode compartment of a second electrochemical cell wherein the electrodes are separated by a barrier, such as, for example, a membrane or diaphragm. The separated cell produces a solution containing predominantly hypochlorous acid.
    Type: Application
    Filed: November 23, 2010
    Publication date: June 9, 2011
    Applicants: Terriss Consolidated Industries, Inc., Water Star, Inc.
    Inventors: Marilyn J. Niksa, Andrew J. Niksa, Marc J. Epstein, Steven Seiden
  • Patent number: 7939042
    Abstract: The invention provides stabilized concentrated aqueous solutions of alkali hypobromites, as well as a process for the preparation of said stabilized concentrated solutions at low temperatures, comprising reacting a concentrated alkali hydroxide aqueous solution with bromine, adding to the non-stabilized reaction product an aqueous solution of a sulfamic compound to stabilize the hypobromite, and oxidizing bromide to produce additional hypobromite.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: May 10, 2011
    Assignee: Bromine Compounds Ltd.
    Inventors: Theodor Morel Fishler, David Feldman
  • Publication number: 20110104038
    Abstract: The present invention relates to a method for making pure salt comprises recapturing post-drilling flowback water from hydro-fracturing; removing oil from the flowback water; filtering the flowback water using an ultra filter with a pore size of about 0.1 microns or less to remove solid particulates and large organic molecules, such as benzene, ethylbenzene, toluene, and xylene, from the water; concentrating the flowback water to produce a brine that contains from about 15 wt % to about 40 wt % of salt relative to the total weight of the flowback brine; performing one or more chemical precipitation process using an effective amount of reagents to precipitate out the desired high quality commercial products, such as, barium sulfate, strontium carbonate, calcium carbonate; and crystallizing the chemically treated and concentrated flowback brine to produce greater than 99.5% pure salt products, such as sodium and calcium chloride.
    Type: Application
    Filed: June 25, 2010
    Publication date: May 5, 2011
    Inventors: Frank A. DiTommaso, Peter N. DiTommaso
  • Patent number: 7931795
    Abstract: The present invention relates to a novel economical on-site electrochemical based membrane cell based process with the capability of producing high strength sodium hypochlorite and/or elemental chlorine gas in any ratio as required by the needs of a water or wastewater treatment plant. The system is compact and modular, using membrane cell based electrolyzers and utilizing novel process modifications and sensors to allow for the unattended control and safe operation of the process. The process allows the operator to produce elemental chlorine gas and sodium hypochlorite in any product ratio, such that 5% to 100% of the total chlorine produced by the process can be converted to high strength bleach. The process has the flexibility to produce stable high quality, low to high strength sodium hypochlorite solutions in concentrations ranging from about 2 to 15% trade as NaOCl.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: April 26, 2011
    Assignee: Electrolytic Technologies Corp.
    Inventors: Jerry J. Kaczur, Derek B. Lubie, Edmund M. Cudworth, Charles W. Clements, Martin E. Nelson
  • Patent number: 7824556
    Abstract: Chlorous acid is generated from a chlorite salt precursor, a chlorate salt precursor, or a combination of both by ion exchange. The ion exchange material facilitates the generation of chlorous acid by simultaneously removing unwanted cations from solution and adding hydrogen ion to solution. Chlorine dioxide is generated in a controlled manner from chlorous acid by catalysis. Chlorine dioxide can be generated either subsequent to the generation of chlorous acid or simultaneously with the generation of chlorous acid. For catalysis of chlorous acid to chlorine dioxide, the chlorous acid may be generated by ion exchange or in a conventional manner. Ion exchange materials are also used to purify the chlorous acid and chlorine dioxide solutions, without causing degradation of said solutions, to exchange undesirable ions in the chlorous acid and chlorine dioxide solutions with desirable ions, such as stabilizing ions, and to adjust the pH of chlorous acid and chlorine dioxide solutions.
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: November 2, 2010
    Inventors: Allison H. Sampson, Richard L. Sampson
  • Publication number: 20100233289
    Abstract: An antimicrobial acid formulation for food and farm applications includes an aqueous solution comprising sulfuric acid present in the aqueous solution in a quantity of from about 1% to about 45% by weight and at least one buffering sulfate salt present in the aqueous solution in a quantity of from about 1% to about 10% by weight.
    Type: Application
    Filed: February 18, 2010
    Publication date: September 16, 2010
    Inventors: Dennis Smithyman, Stephen P. Mixon, SR.
  • Patent number: 7785559
    Abstract: A method which especially can safely produce a hypobromous acid or a water-soluble salt thereof, that does not require expensive equipment or the like, does not involve extra work such as pre-mixing or have restrictions such as producing immediately prior to use, and is simple. Further, a method which can efficiently and rapidly form a hypobromous acid or a water-soluble salt thereof which is stable and has high sterilization/anti-microbial effect, and which does not form harmful bromic acid. At least either a hypobromous acid or a water-soluble salt thereof is formed by reacting at least either a hypochlorous acid or a water-soluble salt thereof with a bromide in a liquid to be treated, wherein the at least either hypobromous acid a water-soluble salt thereof is formed by adding a modified chlorite to the liquid to be treated.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: August 31, 2010
    Assignee: Tohzai Chemical Industry Co., Ltd.
    Inventors: Zenichi Nishi, Koichi Kudoh, Naoya Okamoto
  • Patent number: 7767157
    Abstract: A system and method are disclosed for increasing the concentration of hypochlorous acid in a quantity of water. Acid is injected into chlorinated water to decrease the pH of the chlorinated water. By decreasing the pH, the hypochlorite/hypochlorous acid equilibrium of the chlorinated water is shifted to increase the concentration of hypochlorous acid on the treated water.
    Type: Grant
    Filed: February 1, 2005
    Date of Patent: August 3, 2010
    Assignee: Tomco2 Equipment Company
    Inventors: Tommy J. Shane, Harvey Swain
  • Patent number: 7604720
    Abstract: The present invention relates to a novel economical on-site electrochemical based membrane cell based process with the capability of producing high strength sodium hypochlorite and/or elemental chlorine gas in any ratio as required by the needs of a water or wastewater treatment plant. The system is compact and modular, using membrane cell based electrolyzers and utilizing novel process modifications and sensors to allow for the unattended control and safe operation of the process. The process allows the operator to produce elemental chlorine gas and sodium hypochlorite in any product ratio, such that 5% to 100% of the total chlorine produced by the process can be converted to high strength bleach. The process has the flexibility to produce stable high quality, low to high strength sodium hypochlorite solutions in concentrations ranging from about 2 to 15% trade as NaOCl.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: October 20, 2009
    Assignee: Electrolytic Technologies Corp.
    Inventors: Jerry J. Kaczur, Derek B. Lubie, Edmund M. Cudworth, Charles W. Clements, Martin E. Nelson
  • Patent number: 7578991
    Abstract: A process for efficient, low-pressure production of sodium or potassium hypochlorite. A liquid containing hypochlorite is introduced into a mixing chamber to create a dispersed liquid phase moving generally downward through the mixing chamber. Cl2 is introduced into the mixing chamber to create a continuous gas phase containing Cl2 moving in concurrent flow, while reacting, with the dispersed liquid phase to produce hypochlorite. The reactants are constrained to pass through a static mixer that aids the reaction without causing any substantial foaming in aqueous hypochlorite that collects at the bottom of the mixing.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: August 25, 2009
    Assignee: Powell Technologies LLC
    Inventor: Duane Powell
  • Publication number: 20080152579
    Abstract: The invention is a method of producing stable chlorous acid for use as a cleaning agent and biocidal composition. The method passes a salt of an oxy-chloro acid over a resin to allow for an ion exchange that produced the oxy-chloro acid. The invention allows for the production of a stable chlorous acid that can be used as a biocidal agent and a cleaning agent without the effect on many surfaces or membranes as normal oxy-chloro compositions.
    Type: Application
    Filed: December 20, 2006
    Publication date: June 26, 2008
    Inventors: Amit Gupta, E.H. Kelle Zeiher
  • Publication number: 20080113102
    Abstract: Agents for surface treatment which can impart excellent corrosion resistance to zinc or zinc alloy products at low cost. The agents for the surface treatment of zinc or zinc alloy products of this invention include at least one water-soluble compound which contains antimony, bismuth, tellurium or tin. Ideally, a nickel salt and/or a manganese salt is also included, and most desirably tannins and/or thioureas are also included. Ideally, the zinc or zinc alloy products which have been immersed and treated in an aqueous solution which contains these agents for surface treatment are immersed in an aqueous solution which includes a sealing treatment agent selected according to the colour of the zinc or zinc alloy product to seal pinholes.
    Type: Application
    Filed: November 13, 2006
    Publication date: May 15, 2008
    Inventors: Takashi Arai, Ro Bo Shin, Takahisa Yamamoto
  • Patent number: 7175824
    Abstract: A process and apparatus for the manufacture of high-strength, low-salt sodium hypochlorite. An aqueous solution that comprises certain weight percentages of sodium hypochlorite and sodium hydroxide and that is essentially free of sodium chloride (salt) crystals, an aqueous solution that comprises a certain weight percentage of sodium hydroxide, and chlorine in gas and/or liquid phase that may or may not include inerts are reacted in a tank. This creates a solution having a precipitation zone where salt crystals are precipitating out of solution and falling downward to form a slurry, some of which is withdrawn, then cooled, and then re-introduced into the precipitation zone. Above the precipitation zone is a crystal-free mother liquor zone consisting essentially of crystal-free mother liquor containing a weight percentage of sodium hypochlorite greater than that of than the lower strength aqueous sodium hypochlorite bleach being reacted.
    Type: Grant
    Filed: July 11, 2005
    Date of Patent: February 13, 2007
    Assignee: Powell Technologies LLC a Michigan Limited Liability Company
    Inventors: Duane J Powell, Robert B. Bebow, Brent J. Hardman
  • Patent number: 6855307
    Abstract: A system and method are disclosed for increasing the concentration of hypochlorous acid in a quantity of water. Acid is injected into chlorinated water to decrease the pH of the chlorinated water. By decreasing the pH, the hypochlorite/hypochlorous acid equilibrium of the chlorinated water is shifted to increase the concentration of hypochlorous acid on the treated water.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: February 15, 2005
    Assignee: Tomco2 Equipment Company
    Inventors: Tommy J. Shane, Harvey Swain
  • Patent number: 6617447
    Abstract: The present invention relates to a method of starch production using continuous oxidation. This method allows for the starting material to contain variable amounts of non-starch products, which is common in large-scale processes. This method produces consistently oxidized starch products that exhibit a reduced tendency to form amylose crystals. Using this continuous reactor with multiple stages, it is possible to produce oxidized starch at any given viscosity.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: September 9, 2003
    Assignee: Archer-Daniels-Midland Company
    Inventors: Tanja Gnad, James McClain
  • Publication number: 20030064018
    Abstract: Chlorous acid is generated from a chlorite salt precursor, a chlorate salt precursor, or a combination of both by ion exchange. The ion exchange material facilitates the generation of chlorous acid by simultaneously removing unwanted cations from solution and adding hydrogen ion to solution. Chlorine dioxide is generated in a controlled manner from chlorous acid by catalysis. Chlorine dioxide can be generated either subsequent to the generation of chlorous acid or simultaneously with the generation of chlorous acid. For catalysis of chlorous acid to chlorine dioxide, the chlorous acid may be generated by ion exchange or in a conventional manner. Ion exchange materials are also used to purify the chlorous acid and chlorine dioxide solutions, without causing degradation of said solutions, to exchange undesirable ions in the chlorous acid and chlorine dioxide solutions with desirable ions, such as stabilizing ions, and to adjust the pH of chlorous acid and chlorine dioxide solutions.
    Type: Application
    Filed: August 2, 2001
    Publication date: April 3, 2003
    Inventors: Allison H. Sampson, Richard L. Sampson
  • Patent number: 6409981
    Abstract: A process for the scrubbing of chlorine is scrubbed from a chlorine-containing gas using an aqueous feed liquor containing an excess of alkali to give an effluent liquor containing chloride and hypochlorite ions is disclosed. The effluent liquor is recycled as part or all of the aqueous feed liquor. For at least part of the time, at least part of the effluent liquor is passed through a fixed bed of a catalyst for the decomposition of hypochlorite ions whereby hypochlorite ions are decomposed to oxygen gas and chloride ions. The resultant catalyst-treated liquor is mixed with the remainder, if any, of the effluent liquor and recycled, optionally together with added fresh alkali solution, as the aqueous feed liquor. Part of the effluent liquor is optionally discharged as a purge stream before or after passage through catalyst bed.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: June 25, 2002
    Assignee: Imperial Chemical Industries PLC
    Inventors: Edmund Hugh Stitt, Frederick Ernest Hancock
  • Patent number: 6048513
    Abstract: This invention is a method for forming hypohalous acid in a mass transfer device. The method comprises: (1) feeding into the device a stream of caustic solution comprising at least one alkali or alkaline earth metal of a hydroxide, oxide, hypohalite, bicarbonate, or carbonate; (2) feeding a stream comprising halogen gas into the device; (3) reacting at least some of the halogen gas with the caustic solution to form a solution containing hypohalous acid; (4) desorbing the hypohalous acid from the solution and into the stream of halogen gas; and (5) removing the stream of halogen gas from the device. In this method, the mass transfer device comprises a porous rotor which is permeable to the streams, and is rotated about an axis such that the streams flow through the rotor and the stream of caustic solution flows radially outward from the axis.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: April 11, 2000
    Assignee: The Dow Chemical Company
    Inventors: George J. Quarderer, David L. Trent, Erik J. Stewart, Danil Tirtowidjojo, Anil J. Mehta, Cheryl A. Tirtowidjojo
  • Patent number: 5961879
    Abstract: The present invention discloses a process for the manufacture of liquid aqueous bleaching compositions comprising hypochlorite, a strong source of alkalinity and water, said process comprising the steps of: mixing said alkali metal hypochlorite, said strong source of alkalinity and said water, adding a precipitating agent, or mixtures thereof; and thereafter separating the precipitates formed from said composition. The compositions provided by the process according the present invention are substantially free of heavy metal ions, thereby providing improved whiteness performance and/or fabric safety performance.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: October 5, 1999
    Assignee: Procter & Gamble Company
    Inventor: Giuseppe Trigiante
  • Patent number: 5928559
    Abstract: The present invention discloses a process for the manufacture of liquid aqueous bleaching compositions comprising alkali metal hypochlorite, a strong source of alkalinity and water; said process comprising the steps of: mixing alkali metal hypochlorite, strong source of alkalinity and said water, separating the insoluble species formed in the first step, and thereafter adding a chelating agent capable of chelating heavy metal ions. The compositions provided by the process according to the present invention are substantially free of heavy metal ions, thereby providing improved whiteness performance and/or fabric safety performance.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: July 27, 1999
    Assignee: The Procter & Gamble Company
    Inventors: Mauririo Marchesini, Giuseppe Trigiante
  • Patent number: 5641520
    Abstract: A method for providing aqueous solutions of HOBr or HOCl which includes adding bleach (NaOCl) to a solution of HBr or HCl an identified absorbance or color change in the resulting solution is detected. Dialkylhydantoins are optionally added to the resulting solution to suppress the formation of halate ions. The method provides a simple and reliable method for producing accurately defined solutions of hypohalous acids, which are useful in a variety of ways, including for disinfecting, cleaning, and odor control purposes.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 24, 1997
    Assignee: Great Lakes Chemical Corporation
    Inventors: Jonathan N. Howarth, Enrico J. Termine, Alan M. Yeoman
  • Patent number: 5532389
    Abstract: A process of preparing alkylene oxides comprises steps of: (1) optionally forming a hypochlorite solution; (2) contacting chlorine with a solution of a hypochlorite below about 60.degree. C., and a pH of less than about 5.5, with sufficient micromixing to achieve a product hypochlorous acid in a yield of at least about 80 percent; (3) separating at least a portion the hypochlorous acid from an aqueous metal chloride solution wherein the solution is sprayed as droplets; (4) distilling the remaining liquid phase; (5) absorbing the hypochlorous acid and dichlorine monoxide in low-chlorides water to produce a low-chlorides aqueous hypochlorous acid solution; (6) contacting the low-chlorides aqueous hypochlorous acid solution with an olefin in a continuous process to form a olefin chlorohydrin; (7) optionally contacting the olefin chlorohydrin with a base to form a alkylene oxide and a salt solution; and (8) optionally separating the alkylene oxide from the salt solution.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: July 2, 1996
    Assignee: The Dow Chemical Company
    Inventors: David L. Trent, George J. Quarderer, Kim G. Bargeron, Douglas C. Greminger, David J. Koranek, Erik J. Stewart, Curtis N. Swisher, Cheryl A. Tirtowidjojo, Danil Tirtowidjojo
  • Patent number: 5516501
    Abstract: Processes for preparing a relatively concentrated aqueous solution of about 700-3000 ppm hyprobromous acid are provided. Hypochlorous acid solutions are prepared by either reacting chlorine gas with water or sodium hypochlorite with an acid. The resulting hypochlorous acid is then reacted with an alkali metal or alkaline earth bromide in order to form the hypobromous acid. Critical parameters are pH, Br/Cl mole ratio, and chlorine concentration. Under optimum conditions, substantially 100% conversion of bromide to hypobromous acid can be attained.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: May 14, 1996
    Assignee: International Dioxcide
    Inventor: Joseph M. Kelley
  • Patent number: 5422126
    Abstract: A method for providing aqueous solutions of HOBr or HOCl which includes adding bleach (NaOCl) to a solution of HBr or HCl until an identified absorbance or color change in the resulting solution is detected. Dialkylhydantoins are optionally added to the resulting solution to suppress the formation of halate ions. The method provides a simple and reliable method for producing accurately defined solutions of hypohalous acids, which are useful in a variety of ways, including for disinfecting, cleaning, and odor control purposes.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: June 6, 1995
    Assignee: Great Lakes Chemical Corporation
    Inventors: Jonathan N. Howarth, Enrico J. Termine, Alan M. Yeoman
  • Patent number: 5322677
    Abstract: A process for producing an aqueous hypochlorous acid solution reacts droplets of an alkali metal hydroxide solution containing greater than 50 percent by weight of the alkali metal hydroxide with chlorine gas. The reaction produces a gaseous mixture of dichlorine monoxide, chlorine, hypochlorous acid vapor and water vapor, and solid particles of alkali metal chloride. The solid particles of alkali metal chloride are separated and the gaseous mixture condensed at a temperature in the range of from about -33.degree. C. and about -5.degree. C. to produce the aqueous hypochlorous acid solution. The process of the invention results in increased yields of hypochlorous acid and provides an economic basis for increased production capacity. The aqueous hypochlorous acid solutions produced are highly pure and as a result have significantly improved stability.
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: June 21, 1994
    Assignee: Olin Corporation
    Inventors: John H. Shaffer, James K. Melton, Joseph Borcz
  • Patent number: 5236614
    Abstract: Low viscosity and high pH disinfecting and bleaching all purpose cleaning compositions in microemulsion form, suitable in both concentrated and diluted forms for applying to surfaces to be cleaned and disinfected or sanitized, include hypochlorite, higher alcohol sulfate and higher paraffin sulfonate detergents, higher fatty acid soap, alkali metal hydroxide, liquid hydrocarbon, perfume, periodate, branched lower alcohol co-surfactant and water. The compositions are of improved lipophilic soil removing capability when diluted with water, are of about equivalent such capability in neat or concentrated form and are of significantly better hypochlorite stability on aging at room and elevated temperatures, compared to other microemulsion cleaners that contain hypochlorite. Their low viscosities facilitate spraying them from squeeze bottles or pump sprayers onto surfaces to be cleaned and disinfected or sanitized, such as floors and walls.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: August 17, 1993
    Assignee: Colgate-Palmolive Company
    Inventors: Fabienne M. Jacquet, Marie D. DeBrucq, Myriam M. Loth, Claude A. Blanvalet
  • Patent number: 5229027
    Abstract: The present invention relates to an aqueous liquid automatic dishwashing detergent composition which have improved hypochlorite bleach stability. The detergent composition comprises hypochlorite bleach, a bleach stabilizer, inorganic builder salts, bleach-stable detergent and a thickener. Additionally, the composition provides improved bleach storage stability and its improved hypochlorite bleach functionality. The stabilizer can be a water soluble iodate in an amount sufficient to provide a mole ratio of iodate to available chlorine of 0.08 to 1.67. Alternatively, the stabilizer can be a water soluble iodide/iodine mixture in an iodide to iodine mole ratio of 2:1 to 1:2 present in an amount sufficient to provide a mole ratio of iodide to available chlorine of 0.008 to 0.167.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: July 20, 1993
    Assignee: Colgate-Palmolive Company
    Inventor: Fahim U. Ahmed
  • Patent number: 5194238
    Abstract: A process for producing sodium hypochlorite slurries admixes a hypochlorous acid solution having a concentration of 35 percent or greater by weight of HOCl with sodium hydroxide at a temperature below about 25.degree. C. The reaction produces a slurry of sodium hypochlorite pentahydrate in an aqueous solution of sodium hypochlorite where the sodium hypochlorite is present in a concentration of at least 35 percent by weight of NaOCl. The sodium hypochlorite slurries have improved stability and greatly reduced amounts of sodium chloride. The process for produces high strength sodium hypochlorite compositions of high purity having improved yields and reduced product decomposition.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: March 16, 1993
    Assignee: Olin Corporation
    Inventors: Budd L. Duncan, Richard C. Ness
  • Patent number: 5116593
    Abstract: A method of using an elongated, generally vertically extending cocurrent reactor vessel for the production of hypochlorous acid by the mixing and reaction of a liquid alkali metal hydroxide and a gaseous halogen is provided wherein an atomizer is mounted near the top of the reactor vessel to atomize the liquid alkali metal hydroxide into droplets in the vessel. The vessel has a spraying and reaction zone immediately beneath the atomizer and a drying zone beneath the spraying and reaction zone to produce a gaseous hypochlorous acid and a substantially dry solid salt by-product.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: May 26, 1992
    Assignee: Olin Corporation
    Inventors: James K. Melton, Garland E. Hilliard, John H. Shaffer
  • Patent number: 5116594
    Abstract: Apparatus for the separation of a solid salt by-product from the product gaseous hypohalogenated acid of a reactor is disclosed which is effective to separate particles ranging in size from about 0.5 to about 50 microns. The reactor mixes an aqueous alkali metal hydroxide and a gaseous halogen to produce the hypohalogenated acid product and solid salt by-product which are discharged from the reactor into the separation apparatus.
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: May 26, 1992
    Assignee: Olin Corporation
    Inventors: Garland E. Hilliard, James K. Melton, David A. Helmstetter
  • Patent number: 5102648
    Abstract: A process for producing lithium hypochlorite which admixes an aqueous hypochlorous acid solution, having a concentration of 35 percent or greater by weight of HOCl, with an aqueous slurry of lithium hydroxide at a temperature in the range of from about 0.degree. to about 20.degree. to produce a solution of substantially pure lithium hypochlorite. The lithium hypochlorite solutions produced can be dried directly or concentrated by cooling. The solid lithium hypochlorite produced is a highly pure source of available chlorine.
    Type: Grant
    Filed: February 25, 1991
    Date of Patent: April 7, 1992
    Assignee: Olin Corporation
    Inventors: Budd L. Duncan, Larry D. Carpenter, Leslie R. Osborne, William T. Wooden
  • Patent number: 5089095
    Abstract: A process for producing chlorine dioxide by oxidizing a hypochlorous acid solution to produce a chloric acid solution, and, electrolyzing the chloric acid solution to produce chlorine dioxide.The novel process of the present invention provides a commercially viable process for producing the chloric acid and eliminates the formation of an acidic salt solution in the production of chlorine dioxide which requires disposal. Further, the process permits a reduction in the amount of acid required in the generation of chlorine dioxide.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: February 18, 1992
    Assignee: Olin Corporation
    Inventors: David W. Cawlfield, Jerry J. Kaczur, Budd L. Duncan, Sudhir K. Mendiratta, Ronald L. Dotson, Kenneth E. Woodard, Jr.
  • Patent number: 5085847
    Abstract: A process and apparatus utilizing the process of the present invention are provided to produce a fast dissolving, thermally sensitive granular product. The process employs a fluidized spray dryer having a fluidized bed of granular particles into which recycled off-sized product is fed after being agglomerated to adjust particle size. The spray dryer optionally can employ a second nozzle positioned above the fluidized bed. The process can be employed in the production of calcium hypochlorite water sanitizing chemical wherein the chlorine is supplied from a hypochlorous acid reactor and lime hypochlorinator.
    Type: Grant
    Filed: May 18, 1989
    Date of Patent: February 4, 1992
    Assignee: Olin Corporation
    Inventors: John H. Shaffer, William L. Kurtz