Recovery Or Purification Patents (Class 423/488)
  • Patent number: 10494259
    Abstract: The subject matter of the present invention is a method to extract or recover hydrochloric acid from hydrochloric acid solutions containing metal by means of pyrohydrolytic treatment, followed by absorption and/or condensation of the gaseous hydrogen chloride thus formed in order to form hydrochloric acid. According to the invention, a first partial flow of the hydrochloric acid solution containing metal undergoes pyrohydrolytic treatment and a second partial flow of the metal-containing solution is fed to the absorption column. A device for implementing the process according to the invention is also the subject of the present invention.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: December 3, 2019
    Assignee: Andritz AG
    Inventor: Frank Barhold
  • Patent number: 9889421
    Abstract: A method for recovering hydrochloric acid and metal oxides from a chloride liquor is described. The method uses a chloride liquor including the metal and mixing the liquor and a matrix solution to produce a reaction mixture, wherein the matrix solution assists oxidation/hydrolysis of the metal with HCl production. In a preferred embodiment the matrix solution includes zinc chloride in various stages of hydration and an oxygen containing gas is added to the mix. A method where the improvement is the mixing of a liquor and a matrix solution where the solution assists hydrolysis of the metal with HCl production is also disclosed. The reactor is a column reactor in a preferred embodiment. Further disclosed is the method of using the matrix solution and a reactor for recovering hydrochloric acid and for oxidizing/hydrolysis of a metal.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: February 13, 2018
    Assignee: BRAV METAL TECHNOLOGIES INC.
    Inventors: Bryn Harris, Carl White
  • Patent number: 9115467
    Abstract: A method including: (a) contacting lime with an extract including an S1 solvent carrying a contaminant load to form a lime treated extract; and (b) reducing the contaminant load by removing solids.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: August 25, 2015
    Assignee: Virdia, Inc.
    Inventors: Robert Jansen, Aharon Eyal
  • Patent number: 9089788
    Abstract: The invention relates to a process for purifying chlorosilanes by distillation, which includes providing a boron-containing mixture of chlorosilanes containing TCS, DCS and STC and purifying the mixture of chlorosilanes by distillation in a plurality of distillation columns, wherein low-boiling boron compounds are branched off from the distillation columns by overhead streams containing boron-enriched DCS and high-boiling boron compounds are branched off by a boron-enriched bottom stream containing high boilers.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: July 28, 2015
    Assignee: Wacker Chemie AG
    Inventors: Uwe Paetzold, Walter Haeckl, Jan Prochaska
  • Publication number: 20150147265
    Abstract: Processes of and systems for removing free bromine from gaseous anhydrous HBr contaminated with free bromine are described. In one type of process the gaseous contaminated HBr is fed into countercurrent contact with at least one liquid alkylaromatic hydrocarbon within a packed section of a column while maintaining the packed section under free radical bromination conditions so that one or more than one liquid a-bromoalkylaromatic compound is produced along with one mole of gaseous HBr per mole of a-bromoalkylaromatic compound produced. In another type of process the gaseous anhydrous HBr is fed into countercurrent contact through at least two scrubbers so that the gaseous anhydrous HBr is scrubbed substantially free of bromine by passage through these at least two scrubbers, each of which contains a different specified type of scrubbing liquid. In one embodiment the liquid alkylaromatic hydrocarbon comprises 1,2-diphenylethane.
    Type: Application
    Filed: May 24, 2013
    Publication date: May 28, 2015
    Inventors: William B. Harrod, John M. Harden, Rhett P. Heeb, Steven G. Karseboom, Gary L. Sharp, Robert E. Williams
  • Publication number: 20140308182
    Abstract: A method for concentrating metal chlorides in and separating same from an iron(III) chloride-containing hydrochloric acid solution is described, wherein iron is precipitated from the solution as iron oxide, preferably haematite and filtered off in a filtration device, and the now further concentrated non-hydrolysable metal chlorides are removed from at least a part of the hydrochloric acid filtrate.
    Type: Application
    Filed: December 12, 2012
    Publication date: October 16, 2014
    Applicant: SMS SIEMAG PROCESS TECHNOLOGIES GMBH
    Inventors: Herbert Weissenbaeck, Dieter Vogl
  • Patent number: 8795536
    Abstract: Process for degrading organic substances in an aqueous composition comprising a step (a) wherein, in a liquid reaction medium, said aqueous composition is reacted with at least one composition comprising hydroxide ions (OH?) and hypochlorite in a molar ratio between hydroxide and hypochlorite higher than or equal to 0.001 and lower than 1.5, in order to oxidize said organic substances.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: August 5, 2014
    Assignee: Solvay (Societe Anonyme)
    Inventors: Patrick Gilbeau, Ward Blancke
  • Patent number: 8784644
    Abstract: Provided is a stock oil composition for a carbonaceous material for a negative electrode of a lithium-ion secondary battery which composition is useful for achieving excellent high-speed charge and discharge characteristics. The stock oil composition for a carbonaceous material for a negative electrode of a lithium-ion secondary battery uses a bottom oil of residue fluid catalytic cracking apparatus as a raw material. The stock oil composition comprises, of a saturated component, an aromatic component, a resin component and an asphaltene component detectable by development of the stock oil composition using thin-layer chromatography, the saturated component ranging from 30 to 50% by weight and the aromatic component ranging from 50 to 70% by weight; and has an average molecular weight of from 400 to 600.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: July 22, 2014
    Assignee: JX Nippon Oil & Energy Corporation
    Inventors: Tamotsu Tano, Takashi Oyama, Hiroshi Ozawa, Jun Ougiya, Akio Sakamoto
  • Publication number: 20140147373
    Abstract: A process according to the invention is a process to separate an initial fluid stream comprising phosgene and hydrogen chloride in at least a first and a second fluid stream, said first fluid stream being a hydrogen chloride enriched and phosgene depleted gaseous stream, said second fluid stream being a hydrogen chloride depleted and phosgene enriched stream.
    Type: Application
    Filed: June 15, 2012
    Publication date: May 29, 2014
    Applicant: Huntsman International LLC
    Inventors: Rabah Mouazer, Ramon Scheffer
  • Patent number: 8685147
    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: Grant
    Filed: August 10, 2011
    Date of Patent: April 1, 2014
    Assignee: Kaneka Corporation
    Inventors: Yusaku Ariki, Hironobu Ibaraki
  • Patent number: 8658846
    Abstract: Disclosed herein are processes for separation of 2,3,3,3-tetrafluoropropene and hydrogen fluoride using azeotropic distillation. Additionally, disclosed are processes for separating mixtures of 2,3,3,3-tetrafluoropropene, hydrogen fluoride and 1,1,1,2,3-pentafluoropropane (HFC-245eb) and/or 1,1,1,2,2-pentafluoropropane (HFC-245cb) by azeotropic distillation.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: February 25, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventor: Jeffrey P. Knapp
  • Patent number: 8603420
    Abstract: The invention enables processing waste sludge after galvanic treatment of metals, and particularly recycling spent pickling acids after pickling. Provided is an environmentally friendly process, which yields acids for reuse, and pure nano-sized iron pigments as a side product.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: December 10, 2013
    Assignee: Green Future Ltd.
    Inventors: Vladimir Boiko, Reuben Schapiro
  • Publication number: 20130287675
    Abstract: A new, highly selective way of removing bromine contamination from a gaseous stream comprised of hydrogen bromide and bromine is described. Such process technology involves non-catalyzed free radical (benzylic) bromination of an alkylene-bridged aromatic hydrocarbon and/or certain alkyl-substituted aromatic hydrocarbons and recovering the purified gaseous HBr. Because of the high selectivity of the bromination on the aliphatic bridges or side-chains, virtually no ring bromination occurs, and this enables recovery of the bromine values in the form of HBr. Thus preferably, the bromine is recovered as HBr from the scrubbing liquid by subjecting the scrubbing liquid to thermal or catalytic dehyrobromination. In plant operations, the gaseous HBr purified in the process can then be introduced into a compressor to produce either liquid or gaseous HBr for storage under pressure. Alternatively, the purified gaseous HBr can be fed directly into one or more reactions in which HBr is used as a reactant.
    Type: Application
    Filed: December 28, 2011
    Publication date: October 31, 2013
    Applicant: Albemarle Corporation
    Inventors: William B. Harrod, John M. Harden, Gary L. Sharp, Robert E. Williams
  • Patent number: 8540960
    Abstract: A method for producing of ultra-clean and High-purity electronic grade reagents is disclosed. The industrial grade reagents are chemically pretreated and filtered, and the colature is rectified. Heating the steam during the rectification to overheated steam, and filtering the overheated steam used the microporous membrane to remove the solid particulates. Condensing the overheated steam and the secondarily filter to remove the dust in the product. Due to the adoption of the technical scheme, the ultra-clean and High-purity isopropanol produced is in conformity with standard SEMI-C12 and the hydrochloric acid to standard SEMI-C8. And the method is applicable for the large-scale continuous production.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: September 24, 2013
    Assignee: Shanghai Chemical Reagent Research Institute
    Inventors: Jiarong Zhan, Mao Huiping, Hui Shaoliang, Shen Zheyu
  • Patent number: 8529860
    Abstract: Methods for producing silicon tetrafluoride by acid digestion of fluoride salts of alkali metal or alkaline earth metal and aluminum, optionally, in the presence of a source of silicon; methods for producing silane that include acid digestion of by-products of silane production to produce silicon tetrafluoride.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: September 10, 2013
    Assignee: MEMC Electronics Materials, Inc.
    Inventors: Satish Bhusarapu, Puneet Gupta
  • Patent number: 8507396
    Abstract: A process for regenerating a used acidic catalyst which has been deactivated by conjunct polymers by removing the conjunct polymers so as to increase the activity of the catalyst is disclosed. Methods for removing the conjunct polymers include addition of a basic reagent and alkylation. The methods are applicable to all acidic catalysts and are described with reference to certain ionic liquid catalysts.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: August 13, 2013
    Assignee: Chevron U.S.A. Inc.
    Inventors: Saleh Elomari, Thomas V. Harris
  • Patent number: 8466242
    Abstract: Polymers useful as catalysts in non-enzymatic saccharification processes are provided. Provided are also methods for hydrolyzing cellulosic materials into monosaccharides and/or oligosaccharides using these polymeric acid catalysts.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: June 18, 2013
    Assignee: Midori Renewables, Inc.
    Inventors: John M. Geremia, Brian M. Baynes, Ashish Dhawan
  • Publication number: 20130047979
    Abstract: The invention provides an organic phase composition comprising: a. a first component selected from the group consisting of quaternary amines; b. a second component selected from: b1. The group consisting of category B organic acids; b2. The group consisting of a mixtures of category B organic acids and category C organic acids at a B/C molar ratio of RB/C; and b3. The group consisting of a mixtures of category A organic acids and category C organic acids at an A/C molar ratio of RA/C; c. a third component selected from the group consisting of solvents for said first component and for said second component, wherein (i) all three components are oil-soluble and water-insoluble; (ii) the molar concentration of each of said first component and said second component is greater than 0.6 mol/Kg; (iii) the molar ratio between said second component and said first component is greater than 0.
    Type: Application
    Filed: September 21, 2010
    Publication date: February 28, 2013
    Applicant: HCL CLEANTECH LTD.
    Inventors: Aharon Eyal, Robert Jansen
  • Publication number: 20130028832
    Abstract: The present invention provides an organic phase composition comprising: (a) a first solvent (S1) characterized by a water solubility of less than 10% and by at least one of (a1) having a polarity related component of Hoy's cohesion parameter (delta-P) between 5 and 10 MPa1/2 and (b1) having a Hydrogen bonding related component of Hoy's cohesion parameter (delta-H) between 5 and 20 MPa1/2; (b) a second solvent (S2) characterized by a water solubility of at least 30% and by at least one of (a2) having a delta-P greater than 8 MPa1/2 and (b2) having a delta-H greater than 12 MPa1/2; (c) water; (d) HCl; and (e) a carbohydrate.
    Type: Application
    Filed: February 6, 2011
    Publication date: January 31, 2013
    Inventors: Aharon Eyal, Asher Vitner, Revital Mali
  • Publication number: 20130028833
    Abstract: The present invention provides an organic phase composition comprising (f) a first solvent (S1) characterized by water solubility of less than 10% and by at least one of (a1) having a polarity related component of Hoy's cohesion parameter (delta-P) between 5 and 10 mPa1/2 and (b1) having a Hydrogen bonding related component of Hoy's cohesion parameter (delta-H) between 5 and 20 MPa1/2; (g) a second solvent (S2) characterized by water solubility of at least 30% and by at least one of (a2) having a delta-P greater than 8 MPa1/2 and (b2) having a delta-H greater than 12 MPa1/2; (h) water (i) HCl, and (j) a chloride salt.
    Type: Application
    Filed: February 6, 2011
    Publication date: January 31, 2013
    Applicant: HCL CLEANTECH LTD.
    Inventors: Aharon Eyal, Asher Vitner, Revital Mali
  • Patent number: 8221883
    Abstract: For a graphite sheet, a peak intensity ratio (P100/002) of a (100) diffraction peak and a (002) diffraction peak by X-ray diffractometry, and a peak intensity ratio (P110/002) of a (110) diffraction peak and a (002) diffraction peak thereby are set at 10 or more. The graphite sheet is manufactured through a step of preparing a polymer liquid which contains a polymer having carbon in its molecular chains and develops optical anisotropy, a step of unidirectionally orienting the molecular chains of the polymer, a step of obtaining a compact from the polymer liquid in the state that the orientation of the molecular chains of the polymer is maintained, and a step of carbonizing and thereafter graphitizing the compact.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: July 17, 2012
    Assignee: Polymatech Co., Ltd.
    Inventors: Naoyuki Shimoyama, Takehiko Nunokawa
  • Patent number: 8206488
    Abstract: A fluoride ion cleaning method includes generating hydrogen fluoride (HF) gas in-situ in a cleaning retort; contacting a part in need of cleaning with the generated HF gas; scrubbing an initial effluent stream in-situ to substantially remove residual HF gas therefrom; and passing the scrubbed effluent gas stream out of the cleaning retort. In an exemplary method, a liquid or gaseous halogenated feedstock is introduced into a cleaning retort; hydrogen gas is introduced into the cleaning retort, HF gas is generated by a reaction of the feedstock with hydrogen gas at a sufficient temperature. In an exemplary method, only HF gas generated in-situ or reconstituted in-situ is utilized in the cleaning process.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: June 26, 2012
    Assignee: General Electric Company
    Inventor: Thomas E. Mantkowski
  • Publication number: 20120134912
    Abstract: The Invention provides a process for the recovery of gaseous HCl comprising: a) providing an HCl-carrying extractant comprising: (i) an oil soluble amine which amine is substantially water insoluble both in free and in salt form; and (ii) a solvent for the amine and organic acid; b) contacting the HCl-carrying extractant with at least one non-volatile mineral acid, and c) stripping gaseous HCl, whereby HCl-depleted extractant and gaseous HCl are formed.
    Type: Application
    Filed: November 19, 2009
    Publication date: May 31, 2012
    Inventors: Avram Baniel, Robert P. Jansen
  • Patent number: 8163092
    Abstract: A method for producing concentrated HCl vapor from an aqueous solution of HCl, including: (a) introducing an aqueous feed liquor to an evaporation chamber containing a mother liquor, the feed liquor having an initial, super-azeotropic HCl concentration; (b) directly contacting a liquor of these liquors with a heat-laden heat transfer fluid, to transfer heat from the fluid; (c) utilizing the heat to evaporate HCl, within the chamber, to produce the concentrated HCl vapor and to produce the mother liquor, the mother liquor including an aqueous phase having a reduced concentration of HCl, with respect to the initial HCl concentration; (d) subjecting the mother liquor to a liquid-liquid separation to produce a liquid phase containing HCl, and another liquid phase containing the heat transfer fluid in a heat-depleted state, with respect to the heat transfer fluid in step (b); (e) heating the heat transfer fluid in the heat-depleted state, to regenerate the heat-laden heat transfer fluid, and (f) returning this hea
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: April 24, 2012
    Assignee: HCL Cleantech Ltd.
    Inventors: Avraham Baniel, Robert Jansen
  • Patent number: 8152956
    Abstract: Steam stripper off gas from chemical pulp mills, for example kraft or sulphite pulp mills is rich in methanol and totally reduced sulphur (TRS) compounds. This gaseous stream is usually burned to avoid further handling of this TRS-rich, odorous stream. We found that once this gaseous stream is condensed, it can be used as a reducing agent in the chlorine dioxide generator, in place of purchased methanol. Surprisingly, we found that, in addition to the methanol component, the TRS components act as reducing agents during the production of chlorine dioxide or, at the very least, do not consume chlorine dioxide. The use of this stream in the ClO2 generator will allow pulp mills to reduce or eliminate the consumption of purchased methanol while providing a new approach to deal with TRS compounds in the chlorine dioxide generator rather than employing a dedicated TRS incinerator or any other combustion device.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: April 10, 2012
    Assignee: Fpinnovations
    Inventors: Naceur Jemaa, Michael Paleologou, George Sacciadis, Richard M. Berry
  • Patent number: 8153096
    Abstract: The present technology provides compositions that are intimate mixtures of hydrogen fluoride and a polyacrylate-polyacrylamide cross-linked copolymer, as well as methods and preparing and using such compositions. The compositions are less hazardous and, therefore, more conveniently stored, transported, and handled in comparison to pure hydrogen fluoride. Further, the hydrogen fluoride may be readily recovered from the compositions of the invention for use.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: April 10, 2012
    Assignee: Honeywell International Inc.
    Inventors: Matthew H. Luly, Bernard E. Pointner
  • Patent number: 8092769
    Abstract: A process and apparatus are described for converting a feed that is substantially comprised of halogenated materials, and especially byproduct and waste chlorinated hydrocarbons as are produced from a variety of chemical manufacturing processes, to one or more higher value products via a partial oxidation reforming reaction step. These products can be in the form of a useful or salable acid product and/or a product synthesis gas comprised of carbon monoxide and hydrogen, or the reaction product including the same hydrogen halide, carbon monoxide and hydrogen components can be employed as a feed in the synthesis of a different useful or salable product.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: January 10, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Dennis Wade Jewell, John P. Henley, Edward E. Timm, Tarver Gayle Snedecor, Jr., Leopoldo Salinas, III, Charles William Lipp, James Everett Clark
  • Patent number: 8071067
    Abstract: Processes for forming ferric chloride solutions that are stable at relatively low temperatures and suitable for transportation without precipitation are provided. The stable ferric chloride solutions have an iron content of about 16 to about 23 weight percent and a hydrochloric acid content of about 11 to about 17 weight percent, wherein the ferric chloride solution is a stable solution and/or reversibly freezes at ?10° C. Also disclosed are processes for reconstituting the stable ferric chlorides solutions to provide a final iron content of 10 to 14 weight percent and lower the concentration of hydrochloric acid contained therein.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: December 6, 2011
    Assignee: Kemira Water Solutions, Inc.
    Inventors: Krister Eskilsson, Jeff Campbell, Stig Gunnarsson, Jan Pavlicek
  • Publication number: 20110236296
    Abstract: Provided is a method of purifying hydrochloric acid by removing an organic substance having a boiling point of ?25° C. to 120° C. under atmospheric pressure from an organic substance-containing hydrochloric acid that contains the organic substance and has a hydrogen chloride concentration higher than an azeotropic hydrogen chloride concentration under atmospheric pressure. The method includes the step of subjecting the organic substance-containing hydrochloric acid to distillation using a distillation tower at an operation pressure set such that an azeotropic hydrogen chloride concentration under the operation pressure is higher than the hydrogen chloride concentration of the organic substance-containing hydrochloric acid, to distill out the organic substance from the top of the distillation tower.
    Type: Application
    Filed: November 24, 2009
    Publication date: September 29, 2011
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Toyomitsu Shimizu, Norihito Omoto, Shoichi Futagami, Sadayuki Miyamura
  • Publication number: 20110178290
    Abstract: A process for the co-production of gaseous HCl and a salt product comprising a cation and an anion, which process comprises the steps of a. providing an aqueous solution comprising protons, chloride anions, and cations and anions of the salt product, b. bringing the solution into contact with a substantially immiscible extractant, the extractant comprising: 1) an oil soluble amine, which amine is substantially water insoluble both in free and in salt form; and 2) a carrier solvent for the amine; whereupon HCl selectively transfers to the extractant to form an HCl-carrying extractant and a chloride depleted aqueous solution containing the salt product; c. separating the HCl-carrying extractant from the chloride-depleted aqueous solution; and d. distilling HCl from the separated HCl-carrying extractant to form gaseous HCl and HCl depleted extractant.
    Type: Application
    Filed: February 28, 2011
    Publication date: July 21, 2011
    Applicant: HCL CLEANTECH LTD.
    Inventors: Avram BANIEL, Aharon EYAL
  • Patent number: 7976807
    Abstract: Hexachlorodisilane is decomposed into hydrochloric acid, silicon dioxide and water by introducing hexachlorodisilane-containing flue gas into a reaction region without moistening the flue gas and by supplying oxygen-containing gas that also contains a small amount of moisture to the reaction region maintained at a temperature at which hexachlorodisilane decomposes.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: July 12, 2011
    Assignees: Kanken Techno Co., Ltd., Toagosei Co., Ltd.
    Inventors: Hiroshi Imamura, Hiroaki Takeuchi, Koji Ishikawa, Hiroshi Suzuki, Akira Moriya, Katsuyoshi Harada
  • Publication number: 20110166369
    Abstract: Process for purifying hydrogen chloride, comprising at least one step of bringing said hydrogen chloride into contact with a scrubbing agent containing at least one chlorohydrin.
    Type: Application
    Filed: September 11, 2009
    Publication date: July 7, 2011
    Applicant: SOLVAY SA
    Inventors: Philippe Krafft, Patrick Gilbeau
  • Patent number: 7922876
    Abstract: In a method for recovering acid from an aqueous etching mixture containing HF, HNO3, H2SiF6 and HNO2 which has been used for purifying polycrystalline silicon, the used etching mixture is distilled progressively so that approximately from 20 to 50 wt. % of the mixture is distilled off as dilute acid containing more than 90 wt. % of the silicon dissolved as hexafluorosilicic acid in a first fraction, and the water contained in the used etching mixture having been reduced by approximately 10-30 wt. %, this water-depleted mixture is then concentrated by evaporation to a residue of about 1 to 5 wt. % of the initial amount of used etching mixture during which a second fraction is distilled off, and the residue is disposed of.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: April 12, 2011
    Assignee: Wacker Chemie AG
    Inventors: Hanns Wochner, Christian Gossmann, Wolfgang Stoiber
  • Patent number: 7914761
    Abstract: The present invention provides compositions that are intimate mixtures of hydrogen fluoride and a polyacrylate-polyacrylamide cross-linked copolymer. The compositions of the invention are less hazardous and, therefore, more conveniently stored, transported, and handled in comparison to pure hydrogen fluoride. Further, the hydrogen fluoride may be readily recovered from the compositions of the invention for use.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: March 29, 2011
    Assignee: Honeywell International Inc.
    Inventors: Matthew H. Luly, Bernard E. Pointner
  • Publication number: 20110028710
    Abstract: There is provided a process for the recovery of HCI from a dilute solution thereof, comprising bringing a dilute aqueous HCI solution into contact with a substantially water-immiscible extractant, the extractant comprising an oil soluble amine, which amine is substantially water insoluble both in free and in salt form; an oil soluble weak organic acid having a pKa above 3, which acid is substantially water insoluble both in free and in salt form; and a solvent for the amine and organic acid; whereupon HCI selectively transfers to the extractant to form an HCI-carrying extractant, and treating the HCI-carrying extractant to obtain gaseous HCI. Also provided is the extractant composition.
    Type: Application
    Filed: April 7, 2009
    Publication date: February 3, 2011
    Applicant: HCL CLEANTECH LTD.
    Inventors: Avram Baniel, Aharon Eyal
  • Patent number: 7819949
    Abstract: (Chloro)hydrocarbon-free hydrogen chloride and phosgene-free (chloro)hydrocarbons are recovered from a hydrogen chloride stream having (chloro)hydrocarbons and phosgene.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: October 26, 2010
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Sesing, Heiner Schelling, Juergen Ciprian, Filip Deberdt, Martin Karches, Olga Schubert
  • Patent number: 7790130
    Abstract: Wide mesoporous alumina composites are produced by an “in situ reaction” route comprising agglomeration of an alumina powder that is capable of rehydration together with a second reactive powder such as carbonate. In one method of production, the powders are fed to a rotating forming device that is continuously sprayed with liquid under conditions to form particulates. The discharging beads are then subjected to curing and thermal activation to produce the final catalyst or adsorbent. The alumina participates in a pore altering process involving the carbonate component upon formation of hydroxycarbonate intermediates such as Dawsonite. Large fraction of the pore volume of the final product consists of wide mesopores in the 15-50 nanometers range. The alumina composites exhibit a characteristic trimodal pore structure that includes also small micro-meso pores and macropores larger than 200 nanometers.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: September 7, 2010
    Assignee: UOP LLC
    Inventor: Vladislav I. Kanazirev
  • 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
  • Publication number: 20100189623
    Abstract: The invention relates to a process for recovering acids from product streams of organic syntheses, which comprises the steps a) neutralization of the acid with a base, b) removal of the base by means of adsorption, c) recovery of the acid.
    Type: Application
    Filed: June 9, 2008
    Publication date: July 29, 2010
    Applicant: BASF SE
    Inventors: Veronika Wloka, Torsten Mattke, Carsten Knoesche, Daniel Breuninger, Nils Bottke
  • Publication number: 20100150816
    Abstract: Methods for purifying an aqueous hydrochloric acid solution waste stream having an impurity fraction comprising an initial Ti fraction, an initial S fraction and an initial Si fraction; that provide purified aqueous hydrochloric acid solutions having a final Ti fraction of less than 250 ppm, a final S fraction of less than 200 ppm, and a final Si fraction of less than 10 ppm, which may be determined with inductively coupled plasma spectroscopy. Process steps in various embodiments include sparging with an gas; mixing the sparged solution with a precipitation agent comprising a sufficient amount of an alkali earth metal salt and, optionally, a phosphoric acid source, to provide a metal salt precipitate; and mixing the initial aqueous acid solution or, optionally, the sparged aqueous acid solution, with a flocculating polymer. A preferred alkali earth metal salt is barium chloride and preferred flocculating polymers are poly(diallyldialkylammonium chloride) homopolymers and copolymers.
    Type: Application
    Filed: November 28, 2007
    Publication date: June 17, 2010
    Applicant: E.I.DuPont De Nemours and Company
    Inventors: Stephen W. Oldiges, Mark Andrew Harmer, Jesse S. Jones, David C. Confer
  • Patent number: 7732363
    Abstract: A process for regenerating a used acidic catalyst which has been deactivated by conjunct polymers by removing the conjunct polymers so as to increase the activity of the catalyst is disclosed. Methods for removing the conjunct polymers include hydrogenation, addition of a basic reagent and alkylation. The methods are applicable to all acidic catalysts and are described with reference to certain ionic liquid catalysts.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: June 8, 2010
    Assignee: Chevron U.S.A. Inc.
    Inventors: Saleh Elomari, Thomas V. Harris
  • Publication number: 20100135895
    Abstract: The present invention provides a method for separating HBr from HBr-containing hydrocarbons (alkenes, aromatics and/or alkanes) to purify the hydrocarbons. Reacting a silica supported metal oxide solid material (MOx/SiO2, MOx=MgO, CoO, Co2O3, CuO and mixture thereof) with HBr in HBr-containing hydrocarbons, so as to ensure that the concentration of HBr is reduced to below 1.87×10?16, and then oxidizing the solid material which reacted with HBr in oxygen or air to regenerate MOx/SiO2, meanwhile Br2 is recycled. Therefore, the purpose of continuous purification of hydrocarbons can be achieved.
    Type: Application
    Filed: April 14, 2008
    Publication date: June 3, 2010
    Inventors: Xiaoping Zhou, Zhen Liu, Wenshen Li, Yanqun Ren
  • Patent number: 7704470
    Abstract: The present invention is drawn to a method for removing colloidal titanium dioxide and titanium oxychloride from by-product hydrochloric acid. The method includes adding phosphate ion source and quaternary amine to the by-product acid to cause the titanium dioxide and the titanium oxychloride to form a precipitate. The precipitate can then be separated from the acid, thus producing a decontaminated hydrochloric acid product with reduced levels of titanium.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: April 27, 2010
    Assignee: Haydock Consulting Services, LC
    Inventor: Frederick Haydock
  • Publication number: 20100093995
    Abstract: The invention provides a process for the recovery of HCl from a dilute solution thereof, comprising: a) bringing a dilute aqueous HCl solution into contact with a substantially immiscible extractant, said extractant comprising: 1) an oil soluble amine which amine is substantially water insoluble both in free and in salt form; 2) an oil soluble organic acid which acid is substantially water insoluble both in free and in salt form; and 3) a solvent for the amine and organic acid; whereupon HCl selectively transfers to said extractant to form an HCl-carrying extractant; and b) treating said HCl-carrying extractant to obtain gaseous HCl.
    Type: Application
    Filed: March 4, 2008
    Publication date: April 15, 2010
    Applicant: HCL CLEANTECH LTD.
    Inventors: Avram Baniel, Aharon Eyal
  • Patent number: 7691351
    Abstract: The present invention is directed to a method for treatment of a gas stream comprising silicon tetrafluoride and hydrogen chloride. For example, the present invention is directed to a method for treatment of such a gas stream that involves contacting the gas stream with a metal that reacts with the hydrogen chloride to provide a treated gas stream having reduced hydrogen chloride content. The present invention is further directed to methods for subjecting silicon tetrafluoride and hydrogen chloride-containing gas streams to elevated pressure to provide gas streams suitable for transport.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: April 6, 2010
    Assignee: MEMC Electronic Materials, Inc.
    Inventors: Vithal Revankar, Jameel Ibrahim
  • Patent number: 7678738
    Abstract: A method for treating saturated activated coke comprises the following steps: A) The saturated activated coke is subjected to a dehydration treatment so that the water content in the activated coke is ?25%; B) The product obtained from step A is dried at a starting temperature of 120° C.-150° C.; C) The product obtained from step B is subjected to dry distillation and the condition of the dry distillation is that: by heating to a final temperature for the drying of 500° C.-600° C. at a speed of 4° C.-10° C./min and maintaining for 10-60 minutes, the organics adsorbed on the surface and in the pores of the activated coke is cracked, volatilized and carbonized; D) The product obtained from step C is activated and the activation condition is that: after heating to 800° C.-950° C. at 2° C.-8° C./min, a stream is supplied, wherein the weight ratio of the activated coke to the stream is 1:0.5-5 and the activation time is 0.5-2 h. The activated coke after several times of treatment can be used as the fuel.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: March 16, 2010
    Assignee: Mississippi International Water, Inc.
    Inventor: Dawei Zhang
  • Publication number: 20090317317
    Abstract: A method of storing and dispensing a fluid includes providing a vessel configured for selective dispensing of the fluid therefrom. A solvent mixture comprising an ionic liquid and a cosolvent is provided within the vessel. The fluid is contacted with the solvent mixture for take-up of the fluid by the solvent mixture. The fluid is released from the ionic liquid and dispensed from the vessel.
    Type: Application
    Filed: September 1, 2009
    Publication date: December 24, 2009
    Applicant: Matheson Tri-Gas, Inc.
    Inventors: Carrie L. Wyse, Robert Torres, JR., Joseph V. Vininski
  • Patent number: 7625540
    Abstract: A method for removing fluorine gas from a selected environment comprises contacting the fluorine gas with water to generate a solution of hydrofluoric acid and contacting the solution of hydrofluoric acid with an ion exchange resin having an active state operative to exchange selected ions therein for fluoride ions in the solution. The apparatus (200) may include a dual resin setup (222, 223) such that one of the ion-exchange resin can be in the service cycle while the other of the ion-exchange resins undergoes the regeneration and rinse/refill cycles.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: December 1, 2009
    Assignee: Edwards Vacuum, Inc.
    Inventor: Juzer Jangbarwala
  • Patent number: 7597873
    Abstract: A process for the recovery of metal oxides from a solution containing metallic salts by spray roasting of these solutions. The process is particularly suitable for spray roasting spent pickling acids. The process feeds the solution to a reactor for spray roasting of the droplets in at least two stages, where at least one evaporation stage follows at least one conversion stage to convert the metal salts to metal oxides. The device for implementing the process includes a spray roasting reactor having a first heating zone to evaporate the water and a second heating zone to convert the metal salts to oxides.
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: October 6, 2009
    Assignee: Andritz AG
    Inventor: Albert Lebl
  • Patent number: 7560083
    Abstract: A method for removing water molecules from a vacuum chamber for carrying out a process on a target object in vacuum includes the steps of introducing into the vacuum chamber a water molecule removal gas including at least a reduction gas which reduces the water molecules to produce hydrogen molecules and a halogen-based gas which reacts with the produced hydrogen molecules to produce acid, exhausting gases in the vacuum chamber measuring an amount of water molecules present inside the vacuum chamber, and determining whether or not the measured amount of water molecules is greater than or equal to a threshold value, wherein if the measured amount of water molecules is greater than or equal to the threshold value, the water molecule removal gas is introduced into the vacuum chamber in the introducing step.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: July 14, 2009
    Assignee: Tokyo Electron Limited
    Inventors: Tsuyoshi Moriya, Hiroyuki Nakayama, Hiroshi Nagaike
  • Patent number: 5136002
    Abstract: Disclosed is a resin composition comprising a copolymer [I] having a number average molecular weight of at least 15,000, which comprises at least 30 mole % of the following recurring units [A]: ##STR1## and a compound [II] having a number average molecular weight of at least 1,000, which is comprised of perfluoroalkylether recurring units [D]. This resin composition is used as a cladding of a core-clad optical fiber.
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: August 4, 1992
    Assignee: Mitsubishi Rayon Company, Ltd.
    Inventors: Teruhiko Sugimori, Takashi Yamamoto, Tsuruyoshi Matsumoto, Katsuhiko Shimada