Aqueous Alkali Environment (i.e., Ph Greater Than Or Equal To 8.4) Patents (Class 422/13)
  • Patent number: 9988621
    Abstract: The present invention relates to a method for the inactivation of enzymes with a composition comprising a sulfonated peroxycarboxylic acid according to formula (I) wherein: R1 is hydrogen, or a substituted or unsubstituted Cm alkyl group; R2 is a substituted or unsubstituted Cn alkyl group; X is a hydrogen atom, a cationic group, or an ester forming moiety; Y is a hydrogen atom, a cationic group, or an ester forming moiety; n is 1 to 10; m is 1 to 10; and n+m is less than or equal to 18, wherein the composition is contacted with the enzyme.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: June 5, 2018
    Assignee: Ecolab USA Inc.
    Inventors: Anja Patten, Christof Nolde, Petra Vogt
  • Patent number: 9862882
    Abstract: A composition comprising an alcohol ether sulfonate is provided for use in methods of removing a fluid from a subterranean hydrocarbon-containing formation.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: January 9, 2018
    Assignee: Ecolab USA Inc.
    Inventors: Fenfen Huang, Duy T. Nguyen
  • Patent number: 9109084
    Abstract: Methods of synthesizing polymers including repeat units of the formula comprise the step of polymerizing repeat units of the formula in the presence of a free radical catalyst, where each R and each M is separately and independently selected from the group consisting of H, C1-C12 straight or branched chain alkyl, aryl, amine, amide, and ester groups, halides, and mixtures thereof, and n ranges from about 2-15.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: August 18, 2015
    Assignee: Jacam Chemical Company 2013, LLC
    Inventors: David Jay Rose, Gene H. Zaid, Thomas W. Burgoyne, Kim Brashear
  • Patent number: 9034209
    Abstract: Corrosion protection formulation comprising (A) from 0.01 to 5% by weight of alkylamine ethoxylates as surfactant component, (B) from 0.01 to 10% by weight of corrosion inhibitors, (C) from 0 to 0.3% by weight of thickeners, (D) from 5 to <75% by weight of freezing point-lowering alcohols selected from among alkanols, glycols, polyalkylene glycols and glycerol, (E) from 5 to 90% by weight of vegetable and/or fatty oils, (F) from 0 to 5% by weight of water and (G) from 0 to 5% by weight of conventional emulsifiers. The formulation is particularly suitable for protecting zinc or zinc-plated components or surfaces or cadmium or cadmium-plated metallic surfaces against corrosion caused by runway deicing compositions used at airports.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: May 19, 2015
    Assignee: BASF SE
    Inventors: Harald Dietl, Uwe Nitzschke
  • Patent number: 9028747
    Abstract: Water treatment compositions are provided that are effective for mitigating corrosion or fouling of surfaces in contact with aqueous systems. The water treatment compositions can include one or more azole compounds, one or more transition metals, and one or more dispersants, in addition to various other additives. The water treatment compositions can exclude phosphorus and still be effective. Methods for mitigating corrosion or fouling of a surface in an aqueous system are also provided.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: May 12, 2015
    Assignee: Ecolab USA Inc.
    Inventor: Jasbir S. Gill
  • Patent number: 8951467
    Abstract: An embodiment prevents equipment fouling (deposition of unwanted material) in an oil recovery system via implementing passivation of metallic components. By preventing or at least slowing or inhibiting corrosion of equipment or components via passivation, such as passivating heat exchangers, metallic piping, and the like, an embodiment in turn reduces fouling thereof. Other embodiments are described and claimed.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 10, 2015
    Assignee: Chemtreat, Inc.
    Inventors: Robert Wright Bedinger, III, Benjamin Edward Niemaseck, Mark Jason Puchovich, John Richardson
  • Patent number: 8916117
    Abstract: A method for the reduction of corrosion in a treatment unit acid used for separating hydrogen sulfide from and acid gas stream using an alkaline absorption solution. Ions comprising the S2? and/or HS? ions formed by the absorption of the hydrogen sulfide in the absorbent solution are subjected to in situ electrochemical oxidization to form polysulfide ions which form a protective coating on the surfaces of the unit.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: December 23, 2014
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Gordon Bryce McGarvey, Robert J. Falkiner, David R. Slim, Bryan M. Knickerbocker
  • Patent number: 8871150
    Abstract: Provided are an apparatus for supplying amine, including: transfer pipe through which amine is transferred; a heat wire which heats the amine that flows through the transfer pipe; a temperature control sensor which controls the temperature in the transfer pipe; and a product recovery valve which recovers product resulting from thermal decomposition of the amine, and a method for supplying amine using the same. The apparatus and method for supplying amine are capable of economically and effectively supplying amine utilizing the thermal decomposition properties of the amine, and may be used to supply amine, for example, to circulating water for power plants.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: October 28, 2014
    Assignee: Soonchunhyang University Industry Academy Cooperation Foundation
    Inventors: In-Hyoung Rhee, Byung-Gi Park, Hyun-Kyoung Ahn, Hyun-Jun Jung, Eun-Sun Jeong, Hyuk-Jun Gwon, Chan-ho Song
  • Patent number: 8865309
    Abstract: The present invention includes compositions and methods of supplying a corrosion inhibitor including placing a corrosion inhibitor attached to a nanostructure carrier, placing the nanostructure carrier containing the corrosion inhibitor at a location and the nanostructure carrier is capable of releasing the corrosion inhibitor.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: October 21, 2014
    Assignee: National Oilwell Varco, L.P.
    Inventors: Deepthi R. Setlur, Stefan M. Butuc
  • Patent number: 8577491
    Abstract: Transport scheduling and transport processes for low microbial (“LM”) bulk products are described. The transport scheduling and processes facilitate low microbial activity in a LM bulk product during the transport of the LM bulk product.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: November 5, 2013
    Assignee: ConAgra Foods Food Ingredients Company, Inc
    Inventors: Robert Mariniello, Edith D. Akins-Lewenthal, Benjamin Warren, Ryan T. Grace
  • Patent number: 8577490
    Abstract: Transport scheduling and transport processes for low microbial (“LM”) bulk products are described. The transport scheduling and processes facilitate low microbial activity in a LM bulk product during the transport of the LM bulk product.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: November 5, 2013
    Inventors: Robert Mariniello, Edith D. Akins-Lewenthal, Benjamin Warren, Ryan T. Grace
  • Patent number: 8577492
    Abstract: Transport scheduling and transport processes for low microbial (“LM”) bulk products are described. The transport scheduling and processes facilitate low microbial activity in a LM bulk product during the transport of the LM bulk product.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: November 5, 2013
    Inventors: Robert Mariniello, Edith D. Akins-Lewenthal, Benjamin Warren, Ryan T. Grace
  • Patent number: 8535447
    Abstract: A method, system and device to use a dilute alkaline solution held at sub-critical temperature and pressure conditions to remove rapidly chloride ions from corroded iron artifacts.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: September 17, 2013
    Assignee: Clemson University Research Foundation
    Inventor: Michael J. Drew
  • Publication number: 20130090271
    Abstract: Aldehydes useful as H2S sulfide scavengers may be corrosive to some metals such as steel, iron and aluminum, but the corrosive effect of the aldehydes may be mitigated by employing a corrosion inhibitor selected from the group consisting of a di-basic soluble phosphate salt, a tri-basic soluble phosphate salt, a phosphate ester, a thiophosphate ester, a thioamine, and combinations thereof.
    Type: Application
    Filed: July 2, 2012
    Publication date: April 11, 2013
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Stephen R. Keenan, Jonathan Collins, Sunder Ramachandran, Vladimir Jovancicevic, Rose Tompkins, Grahame Taylor
  • Patent number: 8383559
    Abstract: The present invention includes compositions and methods of supplying a corrosion inhibitor including placing a corrosion inhibitor attached to a nanostructure carrier, placing the nanostructure carrier containing the corrosion inhibitor at a location and the nanostructure carrier is capable of releasing the corrosion inhibitor.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: February 26, 2013
    Assignee: National Oilwell Varco, L.P.
    Inventors: Deepthi R. Setlur, Stefan M. Butuc
  • Patent number: 8337640
    Abstract: Disclosed are quaternary ammonium salts containing non-halogen anions such as carbonates, bicarbonates, phosphates, glycolates and mixtures thereof as conversion coatings or additives imparting anti-corrosive properties to paints. The invention relates to a method for inhibiting the corrosion of metal surfaces by applying a composition containing one or more quaternary ammonium carbonate or bicarbonate. The disclosure is also directed to anti-corrosive coatings for metal substrates containing these compounds and to metal substrates having these anticorrosive coatings.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: December 25, 2012
    Assignee: Lonza, Inc.
    Inventors: Thomas C. Bedard, Thomas David Burleigh, Larry K. Hall, Joseph Kimler, Joseph W. Scheblein, Michael Y. Chiang
  • Patent number: 8282974
    Abstract: A method for de-soiling and disinfecting produce, the method including: treating the produce with a catholyte solution to yield a catholyte treated produce; sonicating the catholyte treated produce to yield a sonicated produce; and treating the sonicated produce with an anolyte solution.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: October 9, 2012
    Assignee: Dole Fresh Vegetables, Inc.
    Inventors: Thomas W. Johnson, Bob J. Dull
  • Patent number: 8277726
    Abstract: A steam generation system comprises: an oxygenated water treatment (OWT) sub-system configured to generate water having oxidizing chemistry; a steam generation sub-system configured to convert the water having oxidizing chemistry into steam having oxidizing chemistry; an attemperator or other injection device or devices configured to add an oxygen scavenger to the steam having oxidizing chemistry to generate steam having less oxidizing or reducing chemistry; and a condenser configured to condense the steam having less oxidizing or reducing chemistry into condensed water.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: October 2, 2012
    Inventors: Steven C. Kung, Dennis K. McDonald
  • Patent number: 8231838
    Abstract: The present invention refers to a method of processing a biological fluid which comprises cellular components by heat treatment. The method is particularly useful for preparing biological samples for analyte detection. Further, the invention refers to a processed biological fluid comprising substantially quantitatively disintegrated cellular components.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: July 31, 2012
    Assignee: Sebo GmbH
    Inventor: Dietrich Seidel
  • Patent number: 8143204
    Abstract: The present invention relates to methods for removing or preventing scale formation in a liquid food processing operation. Aqueous antiscalant solutions comprising soluble magnesium salts are used to prevent the precipitation of insoluble calcium salts and/or to increase the solubility of insoluble calcium salts.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: March 27, 2012
    Assignee: Ecolab USA Inc.
    Inventors: Peter J. Fernholz, John W. Bolduc, Paul F. Schacht, Michael E. Besse, Anthony W. Erickson
  • Patent number: 8142714
    Abstract: The invention relates to the use of a cleaning agent that contains surfactants and has a pH value of at least 11 when diluted in an aqueous solution and ready for use. Said cleaning agent is used to destabilize prions during mechanical and manual cleaning and/or disinfection of medical and/or surgical instruments and appliances. It has been recognized that this combination enables a reliable destabilization of prions during the mechanical reconditioning of surgical instruments.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: March 27, 2012
    Assignee: Chemische Fabrik Dr. Weigert GmbH & Co. KG
    Inventors: Petra Tiarks, Jurgen Staffeldt
  • Patent number: 8080110
    Abstract: A method, system and device to use a dilute alkaline solution held at sub-critical temperature and pressure conditions to remove rapidly chloride ions from corroded iron artifacts.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: December 20, 2011
    Assignee: Clemson University Research Foundation
    Inventor: Michael J. Drews
  • Patent number: 8057738
    Abstract: Methods for inhibiting corrosion in aqueous evaporative systems where soluble silica (SiO2) is maintained at residuals between 10 Mg/L and saturation, but more preferably maintained at greater than 300 mg/L as SiO2, to provide corrosion inhibiting silica films that protect system metals. Silica is provided by evaporation of water and subsequent concentration and transformation of silica naturally contained in source water. The methods of the present invention provide highly effective inhibition of corrosion for mild steel, copper, stainless steel, aluminum, zinc, galvanized steel and various alloys of such metals. The methods of the present invention comprise pretreatment removal of polyvalent metal ions from the makeup source water, maintenance of concentration of monovalent metal ions, and controlling pH at a minimum of 7.0 in the presence of an elevated temperature aqueous environment.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: November 15, 2011
    Assignee: Water Conservation Technology International, Inc.
    Inventors: Dan A. Duke, John L. Kubis
  • Patent number: 7985318
    Abstract: A method of monitoring and inhibiting scale precipitation and deposition from spent liquor in pulp mill evaporators and concentrators is disclosed. The method includes connecting a black liquor deposition monitor to a pulp mill evaporator or concentrator and measuring the thermal conductivity on the outer surface of the monitor. A controller interprets the measured thermal conductivity and determines a level of scale deposition. If the level of scale deposition is above a predetermined level, the controller is operable to introduce a scale-inhibiting composition to the spent liquor. The scale-inhibiting composition may include organic polycarboxylic acids; organic fatty acids; low molecular weight and polymeric aromatic acids; organic acid esters, anhydrides, and amides; low molecular weight and polymeric aliphatic and aromatic sulfonic acids; and low molecular weight and polymeric amines; and any combinations.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: July 26, 2011
    Assignee: Nalco Company
    Inventors: Sergey M. Shevchenko, Prasad Y. Duggirala, Dmitri L. Kouznetsov
  • Patent number: 7955553
    Abstract: A method of providing corrosion inhibition to copper, nickel, aluminum, zinc, tin, lead, beryllium, carbon steel, various alloys of such metals, and galvanized coatings in evaporative cooling water applications approaching zero liquid discharge that are specifically attacked by cooling water with residuals of corrosive chemistry or ions such as ammonia/ammonium ion, chloride, high TDS, OH?, or high pH. The method includes applying azoles inhibitors (such as TTA, BTA, etc.) at residuals of 0.25 mg/L to 200 mg/L or greater (as azoles) to the cooling water application and operating with a combination of high TDS (greater than 2500 mg/L) and high pH (greater than 9.0), while maintaining low total hardness (less than 200 mg/L as CaCO3).
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: June 7, 2011
    Inventors: Dan A. Duke, John L. Kubis
  • Patent number: 7951347
    Abstract: A sour gas sweetening solution comprises an aqueous solution of a silicon-containing compound and an amine-containing compound. The silicon-containing compound is preferably maintained at a concentration less than or equal to 500 parts per million (“ppm”) more preferably less than or equal to 400 ppm, and most preferably between about 100 ppm and 300 ppm as SiO2. The silicon-containing compound can be MxSiyOz, wherein “M” is a metal and “x”, “y” and “z” are numbers greater than zero. The amine-containing compound can be selected from the group consisting of primary amines, secondary amines and tertiary amines.
    Type: Grant
    Filed: September 1, 2007
    Date of Patent: May 31, 2011
    Assignee: Novum Energy Technology, LLC
    Inventor: Marvin Johnson
  • Patent number: 7708939
    Abstract: A method of providing corrosion inhibition to copper, nickel, aluminum, zinc, tin, lead, beryllium, carbon steel, various alloys of such metals, and galvanized coatings in evaporative cooling water applications approaching zero liquid discharge that are specifically attacked by cooling water with residuals of corrosive chemistry or ions such as ammonia/ammonium ion, chloride, high TDS, OH?, or high pH. The method includes applying azoles inhibitors (such as TTA, BTA, etc.) at residuals of 0.25 mg/L to 200 mg/L or greater (as azoles) to the cooling water application and operating with a combination of high TDS (greater than 2500 mg/L) and high pH (greater than 9.0), while maintaining low total hardness (less than 200 mg/L as CaCO3).
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: May 4, 2010
    Assignee: Water Conservation Technology International, Inc.
    Inventors: Dan A. Duke, John L. Kubis
  • Patent number: 7517493
    Abstract: Methods for inhibiting corrosion in aqueous evaporative systems where soluble silica (SiO2) is maintained at residuals between 10 Mg/L and saturation, but more preferably maintained at greater than 300 mg/L as SiO2, to provide corrosion inhibiting silica films that protect system metals. Silica is provided by evaporation of water and subsequent concentration and transformation of silica naturally contained in source water. The methods of the present invention provide highly effective inhibition of corrosion for mild steel, copper, stainless steel, aluminum, zinc, galvanized steel and various alloys of such metals. The methods of the present invention comprise pretreatment removal of polyvalent metal ions from the makeup source water, maintenance of concentration of monovalent metal ions, and controlling pH at a minimum of 7.0 in the presence of an elevated temperature aqueous environment.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: April 14, 2009
    Inventors: Dan A. Duke, John L. Kubis
  • Patent number: 7468158
    Abstract: Corrosion inhibitor and method of protecting metallic materials in strongly alkaline medium by means of a corrosion inhibitor, characterized in that it contains an amine containing at least one CH group bound to the nitrogen.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: December 23, 2008
    Assignee: LANXESS Deutschland GmbH
    Inventors: Lutz Heuer, Stylianos Savakis, Helmut Diekmann, Eberhard Zirngiebl
  • Publication number: 20080267813
    Abstract: Corrosion inhibitor and method of protecting metallic materials in strongly alkaline medium by means of a corrosion inhibitor, characterized in that it contains an amine containing at least one CH group bound to the nitrogen.
    Type: Application
    Filed: June 23, 2008
    Publication date: October 30, 2008
    Inventors: Lutz Heuer, Stylianos Savakis, Helmut Diekmann, Eberhard Zirngiebl
  • Publication number: 20080262632
    Abstract: A method for obtaining of biomaterials for osteoplasty and tissue engineering cleans a bone of natural origin, which is sawn to plates with a thickness of 0.2 to 2.0 cm, washed twice in 0.1 M phosphate buffer at 65° C., pH 5.8-6.0, calculated as two volumetric parts of the buffer solution per one part of bone, digested in a solution of activated 0.1-0.4% papain at 65° C. for 24 hours. The plates are washed with 5 volumes of water at the temperature 40-80° C., treated with 0.4 N alkali solution at room temperature for 10-24 hours, washed with flowing water, dried, defatted in ethanol/chloroform mixtures in proportion of 1:2 and then in proportion of 2:1, decalcified in 0.4-1 N hydrochloric acid, treated with 1.5-3% hydrogen peroxide for 4 hours, washed with treated water, then washed with ethanol, dried at room temperature, packed and sterilized.
    Type: Application
    Filed: October 27, 2005
    Publication date: October 23, 2008
    Inventor: Andrey Fedorovich Panasyuk
  • Patent number: 7407623
    Abstract: Lecithin and 2-bromo-2-nitropropane-1,3 diol (BNPD) are used to inhibit corrosion in boiler steam condensate systems. Aqueous steam condensate corrosion inhibiting compositions of these components are also disclosed. BNPD is also used as a preservative in lecithin containing and in other GRAS additive containing compositions.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: August 5, 2008
    Assignee: GE Betz, Inc.
    Inventors: Wilson K. Whitekettle, Rosa Crovetto
  • Publication number: 20070259229
    Abstract: The present invention discloses a fuel cell activation method having an operational procedure formed by an electrical power generator, a fuel processing unit, a fan unit and a control unit. The operational procedure includes the step of the control unit selects a startup mode; the step of the control unit starts up the fuel processing unit such that liquid fuel is injected into an anode of the electrical power generator for T1 time; the step of the control unit selects to start up a specific electrical load of the internal load power-supply circuit such that the electrical power generator outputs electrical power to the specific electrical load of the internal load power-supply circuit based on the power output form of a section near the maximum output power of the output voltage-output power curve and the control unit selects to start up the fan unit for T2 time; and the step of the control unit selects to turn off the fuel processing unit and the fan unit for T3 time.
    Type: Application
    Filed: April 27, 2007
    Publication date: November 8, 2007
    Inventors: CHUN-CHIN TUNG, Yung-Lieh Chien
  • Patent number: 7208117
    Abstract: This invention relates to an automated process to inhibit corrosion of the metal surface of an inactive boiler containing water.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: April 24, 2007
    Assignee: Ashland Licensing and Intellectual Property LLC
    Inventors: George F. Hays, Vladimir Grigorov, Lois J. Neil, Bruce L. Lubutti
  • Patent number: 7122148
    Abstract: A methods of the present invention for inhibiting silica scale formation and corrosion in aqueous systems where soluble silica residuals (SiO2) are maintained in excess of 200 mg/L, and source water silica deposition is inhibited with silica accumulations as high as 4000 mg/L (cycled accumulation) from evaporation and concentration of source water. The methods of the present invention also provides inhibition of corrosion for carbon steel at corrosion rates of less than 0.3 mpy (mils per year), and less than 0.1 mpy for copper, copper alloy, and stainless steel alloys in highly concentrated (high dissolved solids) waters. The methods of the present invention comprise pretreatment removal of hardness ions from the makeup source water, maintenance of electrical conductivity, and elevating the pH level of the aqueous environment. Thereafter, specified water chemistry residual ranges are maintained in the aqueous system to achieve inhibition of scale and corrosion.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: October 17, 2006
    Assignee: Water Conservation Technologies International
    Inventors: Dan A. Duke, John L. Kubis, John P. Wetherell
  • Patent number: 7001873
    Abstract: A surface which carries a material which is infected with prions is cleaned with an alkaline cleaning solution to remove as much proteinaceous material as possible from the surface. The cleaning agent is an alkaline cleaning agent which attacks prions remaining on the surface and which attacks prions removed from the surface during the cleaning step. After the cleaning solution is drained, a solution of surfactants, buffers, and heavy metal free corrosion inhibitors is circulated over the surface at 50°–60° C. The surfactants disperse and unclump the prion-contaminated material. A strong oxidant, preferably peracetic acid, is added to the solution to bring the peracetic acid concentration to 1,000–2,500 ppm. The peracetic acid or other strong oxidant attacks the prions, particularly the unclumped prion strands, deactivating the prions. After rinsing and drying, the surface may be wrapped in a microbe impermeable barrier and subjected to terminal sterilization, such as steam autoclaving.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: February 21, 2006
    Assignee: Steris Inc.
    Inventors: Gerald E. McDonnell, Herbert J. Kaiser, Kathleen M. Antloga, Jennifer A. Scocos
  • Patent number: 6998092
    Abstract: A methods for inhibiting silica scale formation and corrosion in aqueous systems where soluble silica (SiO2) can be maintained at residuals below 200 mg/L, but more preferably maintained at greater than 200 mg/L as SiO2, without silica scale and with control of deposition of source water silica accumulations as high as 4000 mg/L (cycled accumulation) from evaporation and concentration of source water. The methods of the present invention also provide highly effective inhibition of corrosion for carbon steel, copper, copper alloy, and stainless steel alloys. The methods of the present invention comprise pretreatment removal of hardness ions from the makeup source water, maintenance of electrical conductivity, and elevating the pH level of the aqueous environment. Thereafter, specified water chemistry residual ranges are maintained in the aqueous system to achieve inhibition of scale and corrosion.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: February 14, 2006
    Assignee: Water Conservation Technologies International
    Inventors: Dan A. Duke, John L. Kubis
  • Patent number: 6881244
    Abstract: The present invention relates to a method for preventing the deposition of contaminants in steam systems. In a method of this type, deposits are prevented in a simple and economic manner by metering an additive into the steam, which additive adheres to the steam-side surface of the steam system and has the effect of repelling moisture and contaminants.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: April 19, 2005
    Assignee: Alstom Technology LTD
    Inventors: Erhard Liebig, Robert Svoboda
  • Publication number: 20040086419
    Abstract: The present invention is directed toward the use of a reaction product of an alkynediol and a polyalkylene polyamine to inhibit intergranular corrosion of metal surfaces in industrial processing systems caused by spray water mist or condensation.
    Type: Application
    Filed: October 30, 2002
    Publication date: May 6, 2004
    Inventors: Stuart D. Klatskin, Steven Weeden, Dino Colarossi, Chris Austin
  • Publication number: 20040076542
    Abstract: The corrosion of metals in contact with aqueous alkanolamine solutions in acid gas removal units is inhibited by adding to the alkanolamine solution a corrosion inhibiting amount of a polythiaether compound.
    Type: Application
    Filed: October 15, 2002
    Publication date: April 22, 2004
    Inventors: Zen-Yu Chang, Liliana Minevski, Ping Lue
  • Patent number: 6695897
    Abstract: A corrosion inhibited formulation for drilling compositions consisting essentially of an environmentally friendly corrosion inhibitor blended with an alkali metal formate. The corrosion inhibitor is prepared pursuant to a process including the steps of: (1) preparing a reactant mixture comprising a fatty acid such as soya fatty acid or tall oil fatty acid with polyfunctional amines; (2) subjecting the reactant mixture to a temperature of between about 130 and 170 for a period sufficient to substantially complete the reaction to obtain a fatty acid amido amine product; (3) solubilizing the reactant product with an organic acid such as acetic to produce a product that is substantially completely soluble in aqueous solutions; and (4) blending the water soluble inhibitor salts into the buffered formate media.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: February 24, 2004
    Assignee: Cortec Corporation
    Inventors: Boris A. Miksic, Alla Furman, Margarita Kharshan, Jostein Braaten, Håkon Leth-Olsen
  • Patent number: 6645400
    Abstract: The present invention describes an innovative means of inhibiting corrosion of metals which experience active-passive transition in contact with an electrolyte. This invention incorporates hydrogen peroxide and/or peroxycarboxylic acids or their constituents to inhibit corrosion by inducing passivation of the metal. Application of this technology reduces the potential for fouling, scaling and deposition as well as outperforming existing methods of corrosion control in these applications.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: November 11, 2003
    Assignee: United States Filter Corporation
    Inventor: Roy Martin
  • Patent number: 6632294
    Abstract: Corrosion of steel surfaces in a heat pump is inhibited by adding a rare earth metal salt to the heat pump's ammonia/water working fluid. In preferred embodiments, the rare earth metal salt includes cerium, and the steel surfaces are cerated to enhance the corrosion-inhibiting effects.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: October 14, 2003
    Assignee: Advanced Mechanical Technology, Inc.
    Inventors: Florian B. Mansfeld, Zhaoli Sun
  • Patent number: 6613249
    Abstract: This invention relates to a corrosion inhibiting composition for use in commercial, institutional, and industrial water systems. The compositions comprise a mixture of (1) a fatty acid ester, and (2) a polyalkylene glycol, preferably polyethylene glycol. These compositions are useful in inhibiting the corrosion of metals such as steel, copper, and brass, which are exposed to water.
    Type: Grant
    Filed: August 8, 2002
    Date of Patent: September 2, 2003
    Assignee: Ashland Inc.
    Inventors: Bruce L. Libutti, Joseph Mihelic
  • Publication number: 20030152479
    Abstract: Corrosion inhibitor and method of protecting metallic materials in strongly alkaline medium by means of a corrosion inhibitor, characterized in that it contains an amine containing at least one CH group bound to the nitrogen.
    Type: Application
    Filed: January 23, 2003
    Publication date: August 14, 2003
    Inventors: Lutz Heuer, Stylianos Savakis, Helmut Diekmann, Eberhard Zirngiebl
  • Publication number: 20030113224
    Abstract: A process for the protection of stainless surface from corrosion by a hypohalite-containing composition, the process comprising:-
    Type: Application
    Filed: October 15, 2002
    Publication date: June 19, 2003
    Applicant: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Michael John Bowyer, Stephen Kelly, John Stewart
  • Publication number: 20030103865
    Abstract: This invention relates to a corrosion inhibiting composition for use in commercial, institutional, and industrial water systems. The compositions comprise a mixture of (1) a fatty acid ester, and (2) a polyethylene glycol ester. These compositions are useful in inhibiting the corrosion of metals such as steel, copper, and brass, which are exposed to water.
    Type: Application
    Filed: October 29, 2001
    Publication date: June 5, 2003
    Inventors: Bruce L. Libutti, Joseph Mihelic
  • Patent number: 6551553
    Abstract: A process is provided for disinfecting articles at temperatures below 5° C. with an aqueous alcoholic salt solution. The process provides a fast reduction of microorganisms at low temperatures with a wide degree of efficacy.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: April 22, 2003
    Assignee: Ecolab GmbH & Co. oHG
    Inventors: Friedrich von Rheinbaben, Klaus-Peter Bansemir, Holger Biering
  • Patent number: 6548016
    Abstract: The present invention provides a composition and method for inhibiting hydrogen permeation in metal refinery equipment comprising incorporating into a product stream handled by said equipment a polyamine amide of 3-hydrocarbyl thiopropionic acid in an amount sufficient to inhibit said hydrogen permeation. In a preferred embodiment, the polyamine amide of 3-hydrocarbyl thiopropionic acid is selected from the group consisting of propanamide, N-[2-[2-[3-(dodecenyl)-2,5-dioxo-1-pyrrolidinyl]ethyl]amino]ethyl]-3-[dodecylthio]-2-methyl and 15-thia-5,8,11-triazaheptacosanoic acid, 2-(dodecenyl)-13-methyl-4,12-dioxo, and combinations thereof.
    Type: Grant
    Filed: May 2, 1996
    Date of Patent: April 15, 2003
    Assignee: Baker Hughes Incorporated
    Inventor: Bradley G. Borgard
  • Publication number: 20030012685
    Abstract: The invention relates to synergistic mixtures of o-phenylphenol and additional bactericides.
    Type: Application
    Filed: August 23, 2002
    Publication date: January 16, 2003
    Inventors: Peter Wachtler, Martin Kugler