Hydrogen Containing Patents (Class 423/387)
  • Patent number: 9162221
    Abstract: A novel heterogeneous liquid phase catalytic process for dehydration of monoethanolamine to ethylenimine and water has been discovered. The process utilizes a novel catalyst made by modifying a cation exchange resin in the hydrogen ion form. The process using the catalyst is performed in a solution of monoethanolamine in a solvent.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: October 20, 2015
    Inventor: John Henry Walker
  • Patent number: 8894960
    Abstract: A process is proposed for reprocessing the exhaust gas from a plant for producing hydroxylamine or hydroxylammonium salts by catalytic reduction of nitrogen monoxide with hydrogen for the purpose of utilization of at least a part of the nitrogen monoxide and if appropriate hydrogen present in the exhaust gas for producing hydroxylamine or hydroxylammonium salts, which comprises, in a first separation stage, selectively separating off nitrogen monoxide from the exhaust gas of the plant for producing hydroxylamine or hydroxylammonium salts.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: November 25, 2014
    Assignee: BASF SE
    Inventors: Carsten Oost, Wolfgang Rohde, Christian Miller, Manfred Stroezel, Alfred Thome, Wilfried Berning
  • Patent number: 8721980
    Abstract: Systems and methods of producing chemical compounds are disclosed. An example chemical production system includes an intake chamber having intake ports for entry of a gas mixture. An igniter ignites the gas mixture in the intake chamber. A nozzle restricts exit of the ignited gas mixture from the intake chamber. An expansion chamber cools the ignited gas with a cooling agent. The expansion chamber has an exhaust where the cooled gas exits the expansion chamber. A chemical compound product is formed in the expansion chamber.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: May 13, 2014
    Assignee: Altmerge, LLC
    Inventor: Bruce H. Peters
  • Patent number: 8703088
    Abstract: The present invention relates to processes for reducing or eliminating the amount of hydrazine from a hydroxylamine-free base containing hydrazine by treating said hydroxylamine-free base with a scavenger agent, and to the hydroxylamine-free base thereby obtained, as well as to its use for producing microdispersions containing a hydroxamated polymer for use as a flocculant in the Bayer process.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: April 22, 2014
    Assignee: Cytec Technology Corp.
    Inventors: Morris Lewellyn, Alan S. Rothenberg, Haunn-Lin Tony Chen, Lino G. Magliocco, Thomas P. Sassi
  • Patent number: 8691168
    Abstract: The present invention provides a process for preparing a solution of electrically uncharged [(OH)x(NH3)yZn]z where x, y and z are each independently 0.01 to 10, comprising at least the steps of (A) contacting ZnO and/or Zn(OH)2 with ammonia in at least one solvent in order to obtain a solution of electrically uncharged [(OH)x(NH3)yZn]z where x, y and z each independently 0.01 to 10 with a concentration c1, (B) removing some solvent from the solution from step (A) in order to obtain a suspension comprising Zn(OH)2, (C) removing solid Zn(OH)2 from the suspension from step (B), and (D) contacting the Zn(OH)2 from step (C) with ammonia in at least one solvent in order to obtain a solution of electrically uncharged [(OH)x(NH3)yZn]z where x, y and z are each independently 0.01 to 10 with the concentration c2, and to highly concentrated solutions of electrically uncharged [(OH)x(NH3)yZn]z where x, y and z are each independently 0.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: April 8, 2014
    Assignee: BASF SE
    Inventors: Veronika Wloka, Friederike Fleischhaker
  • Publication number: 20130315812
    Abstract: The present invention relates to processes for reducing or eliminating the amount of hydrazine from a hydroxylamine-free base containing hydrazine by treating said hydroxylamine-free base with a scavenger agent, and to the hydroxylamine-free base thereby obtained, as well as to its use for producing microdispersions containing a hydroxamated polymer for use as a flocculant in the Bayer process.
    Type: Application
    Filed: July 29, 2013
    Publication date: November 28, 2013
    Applicant: CYTEC TECHNOLOGY CORP.
    Inventors: Morris LEWELLYN, Alan S. ROTHENBERG, Haunn-Lin Tony CHEN, Lino G. MAGLIOCCO, Thomas P. SASSI
  • Publication number: 20130280158
    Abstract: There is provided a method of producing a copper precursor and a copper precursor produced by using the same. The method of producing a copper precursor includes: preparing an aqueous solution including a copper salt or a hydrate thereof; preparing a mixture by mixing urea (CO(NH2)2) with the aqueous solution; and synthesizing the copper precursor by heating the mixture at a temperature of 100 to 120° C.
    Type: Application
    Filed: September 14, 2012
    Publication date: October 24, 2013
    Inventors: Ji Han KWON, Kwi Jong Lee, Chang Hoon Kim, Dong Hoon Kim
  • Patent number: 8545789
    Abstract: Provided is a method for manufacturing hydroxylamine. In this method, an aqueous reaction medium containing acidic buffer agent and nitrate ions in the presence of a limited amount of metal impurities such as Fe or Cu is introduced into a hydroxylamine synthesis reactor in the presence of catalyst to proceed hydroxylamine synthesis by reduction of nitrate ions with hydrogen gas as reducing agent in the aqueous reaction medium to produce hydroxylamine. The reaction is processed in the aqueous reaction medium with a limited amount of metal impurities or even without metal impurities, such that the selection rate of the hydroxylamine product is increased.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: October 1, 2013
    Assignee: China Petrochemical Development Corporation
    Inventors: Shu-Hung Yang, Cheng-Fa Hsieh, Yi-Bau Hung
  • Publication number: 20130230721
    Abstract: A method for producing a catalyst using an additive layer method includes: (i) forming a layer of a powdered catalyst or catalyst support material, (ii) binding or fusing the powder in said layer according to a predetermined pattern, (iii) repeating (i) and (ii) layer upon layer to form a shaped unit, and (iv) optionally applying a catalytic material to said shaped unit.
    Type: Application
    Filed: August 22, 2011
    Publication date: September 5, 2013
    Applicant: JOHNSON MATTHEY PLC
    Inventor: Duncan Roy Coupland
  • Publication number: 20120251429
    Abstract: Systems and methods of producing chemical compounds are disclosed. An example chemical production system includes an intake chamber having intake ports for entry of a gas mixture. An igniter ignites the gas mixture in the intake chamber. A nozzle restricts exit of the ignited gas mixture from the intake chamber. An expansion chamber cools the ignited gas with a cooling agent. The expansion chamber has an exhaust where the cooled gas exits the expansion chamber. A chemical compound product is formed in the expansion chamber.
    Type: Application
    Filed: August 30, 2011
    Publication date: October 4, 2012
    Inventor: Bruce H. Peters
  • Publication number: 20120152852
    Abstract: The present invention relates to processes for reducing or eliminating the amount of hydrazine from a hydroxylamine-free base containing hydrazine by treating said hydroxylamine-free base with a scavenger agent, and to the hydroxylamine-free base thereby obtained, as well as to its use for producing microdispersions containing a hydroxamated polymer for use as a flocculant in the Bayer process.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 21, 2012
    Applicant: CYTEC TECHNOLOGY CORP.
    Inventors: Morris LEWELLYN, Alan S. ROTHENBERG, Haunn-Lin Tony CHEN, Lino G. MAGLIOCCO, Thomas P. SASSI
  • Patent number: 8153092
    Abstract: Provided is a method for manufacturing hydroxylamine. In this method, an aqueous reaction medium containing acidic buffer agent and nitrate ions in the presence of a limited amount of metal impurities such as Fe is introduced into a hydroxylamine synthesis reactor in the presence of catalyst to proceed hydroxylamine synthesis by reduction of nitrate ions with hydrogen gas as reducing agent in the aqueous reaction medium to produce hydroxylamine. The reaction is processed in the aqueous reaction medium with a limited amount of metal impurities, such that the selection rate of the hydroxylamine product is increased while high catalytic activity is kept.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: April 10, 2012
    Assignee: China Petrochemical Development Corporation
    Inventors: Shu-Hung Yang, Cheng-Fa Hsieh, Yi-Bau Hung
  • Publication number: 20120043537
    Abstract: The present invention relates to a process for producing a layer comprising at least one semiconductive metal oxide on a substrate, comprising at least the steps of: (A) preparing a solution comprising at least one precursor compound of the at least one metal oxide selected from the group consisting of carboxylates of mono-, di- or polycarboxylic acids having at least three carbon atoms, or derivatives of mono-, di- or polycarboxylic acids, alkoxides, hydroxides, semicarbazides, carbamates, hydroxamates, isocyanates, amidines, amidrazones, urea derivatives, hydroxylamines, oximes, urethanes, ammonia, amines, phosphines, ammonium compounds, azides of the corresponding metal and mixtures thereof, in at least one solvent, (B) applying the solution from step (A) to the substrate and (C) thermally treating the substrate from step (B) at a temperature of 20 to 200° C.
    Type: Application
    Filed: April 26, 2010
    Publication date: February 23, 2012
    Applicant: BASF SE
    Inventors: Andrey Karpov, Friederike Fleischhaker, Imme Domke, Marcel Kastler, Veronika Wloka, Lothar Weber
  • Publication number: 20110243822
    Abstract: The present invention relates to a method for potassium or nitrogen based fertilizer production from the byproducts of flue gas processing. Further, the present invention relates to a method for isolating fertilizer precursors from a stream of flue gas. The method including a dry sorbent operation, wet scrubbing operation and an oxidization step to remove air pollutants, a carbon dioxide capture step and a sodium bicarbonate precipitation step. The steps involved in the removal of air pollutants are used to isolate precursors for the production of fertilizer. Additionally, the present invention relates to a method for the removal of carbon dioxide from a flue gas stream.
    Type: Application
    Filed: March 31, 2010
    Publication date: October 6, 2011
    Applicant: AIRBORNE TECHNOLOGIES INC.
    Inventor: MURRAY EDWARD ARNE MORTSON
  • Patent number: 7981393
    Abstract: A method of preparing salt of dinitramidic acid, comprising nitration of an initial compound with a nitrating acid mixture to form dinitramidic acid in a reaction mixture. A positive ion is added to the reaction mixture and forms with the dinitramide ion an ion pair complex which precipitates in the acidic reaction mixture, and the precipitate is separated from the mixture. The remaining spent acid can be reprocessed for recovery of acid for preparation of a new nitrating acid mixture. The preferred positive ion is the guanylurea ion which gives a precipitate of guanylurea dinitramide. The precipitate can be used as starting material for preparation of other dinitramide salts, such as KDN and ADN. The guanylurea ion can be formed in situ in the process by cyanoguanidine being reacted with the reaction mixture.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: July 19, 2011
    Assignee: Försvarets Materielverk
    Inventors: Carin Vörde, Henrik Skifs
  • Publication number: 20110171104
    Abstract: The present invention relates to a method for crystallizing ammonium dinitramide (ADN), through spontaneous nucleation and crystal growth, from a solution containing said ammonium dinitramide (AND) dissolved in a solvent. Said solvent characteristically has a viscosity greater than or equal to 0.25 Pa s (250 cP) when said spontaneous nucleation is implemented. The ADN crystals obtained by said method have a median shape factor of 1 to 1.5 and are perfectly suitable for placement in the composition of energy materials.
    Type: Application
    Filed: September 17, 2009
    Publication date: July 14, 2011
    Applicant: SNPE MATERIAUX ENERGETIQUES
    Inventors: Florent Muscatelli, Joel Renouard, Jean-Marc Bouchez
  • Publication number: 20110171103
    Abstract: Provided is a method for manufacturing hydroxylamine. In this method, an aqueous reaction medium containing acidic buffer agent and nitrate ions in the presence of a limited amount of metal impurities such as Fe is introduced into a hydroxylamine synthesis reactor in the presence of catalyst to proceed hydroxylamine synthesis by reduction of nitrate ions with hydrogen gas as reducing agent in the aqueous reaction medium to produce hydroxylamine. The reaction is processed in the aqueous reaction medium with a limited amount of metal impurities, such that the selection rate of the hydroxylamine product is increased while high catalytic activity is kept.
    Type: Application
    Filed: March 22, 2011
    Publication date: July 14, 2011
    Applicant: China Petrochemical Development Corporation
    Inventors: Shu-Hung Yang, Cheng-Fa Hsieh, Yi-Bau Hung
  • Patent number: 7927569
    Abstract: Metallic clusters can be produced by contacting a metal salt such as a metal nitrate with an organic reducing agent. Metals can be selected from a group consisting of metals exhibiting octahedral coordination, and nitrates of the selected metal or metals are contacted with, for example nitrosobenzene. Binary, tertiary, or other clusters can be produced.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: April 19, 2011
    Assignee: State of Oregon Acting By and Through the State Board of Higher Education on Behalf of the University of Oregon
    Inventors: Darren W. Johnson, Elisabeth Rather Healey, Jason T. Gatlin, Zachary L. Mensinger
  • Patent number: 7901812
    Abstract: The invention concerns novel ionic compounds with low melting point whereof the onium type cation having at least a heteroatom such as N, O, S or P bearing the positive charge and whereof the anion includes, wholly or partially, at least an ion imidide such as (FX1O)N?(OX2F) wherein X1 and X2 are identical or different and comprise SO or PF, and their use as solvent in electrochemical devices. Said composition comprises a salt wherein the anionic charge is delocalised, and can be used, inter alia, as electrolyte.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: March 8, 2011
    Assignees: ACEP Inc., Centre National de la Recherche Scientifique, Universite de Montreal
    Inventors: Christophe Michot, Michel Armand, Michel Gauthier, Nathalie Ravet
  • Patent number: 7897130
    Abstract: A process for obtaining a synthesis gas (GS) at a predetermined high pressure corresponding to the ammonia synthesis pressure, in which there are hydrogen and nitrogen in a 3/1 molar ratio, comprising the steps of feeding a continuous flow of natural gas to a primary reforming step (RP) with steam and to a subsequent secondary reforming step (RS) with excess air obtaining a gaseous flow (GF) comprises hydrogen, excess nitrogen with respect to said molar ratio, undesired substances such as impurities and inerts and subjects said gaseous flow to a purification step comprising cryogenic rectification in a separator unit (S) obtaining a continuous flow of synthesis gas (GS) comprising hydrogen and nitrogen in a 3/1 molar ratio, and to a subsequent compression step up to a pressure value required for ammonia synthesis.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: March 1, 2011
    Assignee: Ammonia Casale S.A.
    Inventors: Ermanno Filippi, Geoffrey Frederick Skinner
  • Patent number: 7892512
    Abstract: Provided is a method for manufacturing hydroxylamine. In this method, an aqueous reaction medium containing acidic buffer agent and nitrate ions in the presence of a limited amount of metal impurities such as Fe or Cu is introduced into a hydroxylamine synthesis reactor in the presence of catalyst to proceed hydroxylamine synthesis by reduction of nitrate ions with hydrogen gas as reducing agent in the aqueous reaction medium to produce hydroxylamine. The reaction is processed in the aqueous reaction medium with a limited amount of metal impurities or even without metal impurities, such that the selection rate of the hydroxylamine product is increased.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: February 22, 2011
    Assignee: China Petrochemical Development Corporation
    Inventors: Shu-Hung Yang, Cheng-Fa Hsieh, Yi-Bau Hung
  • Publication number: 20110008238
    Abstract: A process for regenerating hydrogenation catalysts based on a platinum metal, where the hydrogenation catalysts based on a platinum metal are thermally regenerated at temperatures of from 50 to 600° C.
    Type: Application
    Filed: March 2, 2009
    Publication date: January 13, 2011
    Applicant: BASF SE
    Inventors: Gerard Radius, Bart Vander Straeten
  • Publication number: 20100317966
    Abstract: A contrast marker for use in imaging applications, wherein the marker is sensitive to an applied magnetic field through the formation of radical pair species and wherein the marker is independently magnetically sensitive, optically sensitive, and magneto-optically sensitive.
    Type: Application
    Filed: June 4, 2010
    Publication date: December 16, 2010
    Applicant: Institut National D'Optique
    Inventors: Nolwenn Le Bouch, Ozzy Mermut
  • Publication number: 20100143226
    Abstract: A process is proposed for reprocessing the exhaust gas from a plant for producing hydroxylamine or hydroxylammonium salts by catalytic reduction of nitrogen monoxide with hydrogen for the purpose of utilization of at least a part of the nitrogen monoxide and if appropriate hydrogen present in the exhaust gas for producing hydroxylamine or hydroxylammonium salts, which comprises, in a first separation stage, selectively separating off nitrogen monoxide from the exhaust gas of the plant for producing hydroxylamine or hydroxylammonium salts.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 10, 2010
    Applicant: BASF SE
    Inventors: Carsten Oost, Wolfgang Rohde, Christian Miller, Manfred Stroezel, Alfred Thome, Wilfried Berning
  • Publication number: 20100068117
    Abstract: Metallic clusters can be produced by contacting a metal salt such as a metal nitrate with an organic reducing agent. Metals can be selected from a group consisting of metals exhibiting octahedral coordination, and nitrates of the selected metal or metals are contacted with, for example nitrosobenzene. Binary, tertiary, or other clusters can be produced.
    Type: Application
    Filed: August 14, 2009
    Publication date: March 18, 2010
    Inventors: Darren W. Johnson, Elisabeth Rather Healey, Jason T. Gatlin
  • Publication number: 20090324480
    Abstract: Provided is a method for manufacturing hydroxylamine. In this method, an aqueous reaction medium containing acidic buffer agent and nitrate ions in the presence of a limited amount of metal impurities such as Fe or Cu is introduced into a hydroxylamine synthesis reactor in the presence of catalyst to proceed hydroxylamine synthesis by reduction of nitrate ions with hydrogen gas as reducing agent in the aqueous reaction medium to produce hydroxylamine. The reaction is processed in the aqueous reaction medium with a limited amount of metal impurities or even without metal impurities, such that the selection rate of the hydroxylamine product is increased.
    Type: Application
    Filed: July 8, 2009
    Publication date: December 31, 2009
    Applicant: China Petrochemical Development Corporation
    Inventors: Shu-Hung Yang, Cheng-Fa Hsieh, Yi-Bau Hung
  • Patent number: 7635459
    Abstract: Disclosed is a method of removing nitric acid from an aqueous liquid containing various components such as vegetable extract, and nitrate ion is removed selectively without spoiling the taste or other components, by subjecting the aqueous liquid to chromatographic treatment with an amphoteric ion exchanger to separate nitrate ion from other components contained in the aqueous liquid. A nitric acid-reduced drink is produced by preparing a raw drink material comprising an extract or juice of plant tissue; removing nitric acid from the raw drink material with use of the method of removing nitric acid from an aqueous liquid as described above; and preparing a drink using the raw drink material after the removing of nitric acid.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: December 22, 2009
    Assignee: ITO EN, Ltd.
    Inventors: Takanobu Takihara, Yuji Kubota
  • Patent number: 7608236
    Abstract: A method of producing hydroxylammonium salts by catalytic reaction of nitrogen monoxide with hydrogen in a diluted aqueous solution of mineral acid in the presence of platinum catalysts suspended on a support in multiple subsequent reaction stages. This reaction takes place in a stirred reactor wherein a gas inlet and distribution system is provided in the lower part of the stirred reactor, a disk agitator is placed immediately above, the hub with bearing surface or support mounting angled, concave and tilted agitator blades that rotate their angled or concave sides in the direction of motion, and a two-blade agitator is provided on the agitator shaft in the upper part of the stirred reactor, its individual leaves being offset like lamellas so that they constantly wet the reactor cap when rotating.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: October 27, 2009
    Assignee: Domo Caproleuna GmbH
    Inventors: Wolfgang Löbel, Thomas Strecker, Joachim Seidler
  • Publication number: 20090175774
    Abstract: The detecting and monitoring of solid structure or phase transformation, such as those used for testing the formation of gas hydrates and their inhibition by chemical additives may be conducted in a multi-test assembly of laboratory bench scale loops. The test loop contains a fluid that includes water and hydrate-forming guest molecules such as methane, ethane, carbon dioxide and the like at hydrate-forming conditions of low temperature and high pressure. A small bit or “pig” may be circulated through the test loop at variable speeds. The pig may be moved or impelled through the test loop remotely. The formation of hydrates may be monitored with consistent and reproducible results.
    Type: Application
    Filed: January 3, 2008
    Publication date: July 9, 2009
    Applicant: BAKER HUGHES INCORPORATED
    Inventor: Jun TIAN
  • Publication number: 20090123356
    Abstract: Provided is a semiconductor doped with an increased binding energy hydrogen species and a method of making the doped semiconductor.
    Type: Application
    Filed: June 11, 2008
    Publication date: May 14, 2009
    Inventor: Randell L. Mills
  • Publication number: 20080226533
    Abstract: A method of preparing salt of dinitramidic acid, comprising nitration of an initial compound with a nitrating acid mixture to form dinitramidic acid in a reaction mixture. A positive ion is added to the reaction mixture and forms with the dinitramide ion an ion pair complex which precipitates in the acidic reaction mixture, and the precipitate is separated from the mixture. The remaining spent acid can be reprocessed for recovery of acid for preparation of a new nitrating acid mixture. The preferred positive ion is the guanylurea ion which gives a precipitate of guanylurea dinitramide. The precipitate can be used as starting material for preparation of other dinitramide salts, such as KDN and ADN. The guanylurea ion can be formed in situ in the process by cyanoguanidine being reacted with the reaction mixture.
    Type: Application
    Filed: January 21, 2005
    Publication date: September 18, 2008
    Inventors: Carin Vorde, Henrik Skifs
  • Patent number: 7425247
    Abstract: This invention relates to a method for producing an aqueous solution of free hydroxylamine (HA) by simultaneous countercurrent treatment of a HA salt with ammonia or ammonia water, then separating the HA by distillation and reconcentrating the aqueous HA solution in a countercurrent with a stripping medium. The stripping medium used according to the invention is a mixture of steam and a non-condensable inert gas and the process temperature at a defined pressure is controlled by the quantity of non-condensable inert gas at the column inlet. The preferred non-condensable inert gas is nitrogen. This results in increased safety and a reduction in losses of the method for producing aqueous solutions of free HA.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: September 16, 2008
    Assignee: Domo Caproleuna GmbH
    Inventors: Norbert Leetsch, Thomas Strecker, Manfred Kretschmar, Joachim Seidler
  • Publication number: 20080193362
    Abstract: It is an object of the present invention to provide a process for producing a hydroxylamine by reacting a salt of hydroxylamine with an alkali compound, where the yield reduction due to formation of a complex between the produced hydroxylamine and a salt produced as a by-product or adsorption of the hydroxylamine to the by-product salt is decreased, and a high-concentration and high-purity hydroxylamine is safely produced at a high yield. The process for producing a hydroxylamine of the present invention comprises a reaction step of reacting a salt of hydroxylamine with an alkali compound to obtain a hydroxylamine while keeping the reaction solution at a pH of 7 or more, a purification step of purifying the hydroxylamine by ion exchange, and a concentration step of concentrating the hydroxylamine by distillation at the column bottom.
    Type: Application
    Filed: August 12, 2004
    Publication date: August 14, 2008
    Inventors: Takanori Aoki, Toshitaka Hiro
  • Patent number: 7396519
    Abstract: A high purity aqueous solution of hydroxylamine product is prepared by treating an aqueous solution of hydroxylammonium salt with a base like ammonia at low temperatures. A novel process can be carried out by separating the ammonium salt side product from hydroxylamine with a low temperature filtration and a resin-exchange process. The concentration of the hydroxylamine product is further improved by a safe distillation process that produces a high purity and high concentration hydroxylamine product with reduced risks of explosion.
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: July 8, 2008
    Assignee: San Fu Chemical Company, Ltd.
    Inventors: Kaung-Far Lin, Jin-Fu Chen, Wei Te Lin, Ruey-Shing Chen, Kung-Chin Kuo
  • Patent number: 7378194
    Abstract: The invention concerns novel ionic compounds with low melting point whereof the onium type cation having at least a heteroatom such as N, O, S or P bearing the positive charge and whereof the anion includes, wholly or partially, at least an ion imidide such as (FX1O)N?(OX2F) wherein X1 and X2 are identical or different and comprise SO or PF, and their use as solvent in electrochemical devices. Said composition comprises a salt wherein the anionic charge is delocalised, and can be used, inter alia, as electrolyte.
    Type: Grant
    Filed: October 1, 2004
    Date of Patent: May 27, 2008
    Assignees: ACEP, Inc., Centre de la Recherche Scientifique, Universite de Montreal
    Inventors: Christophe Michot, Michel Armand, Michel Gauthier, Nathalie Ravet
  • Publication number: 20070243123
    Abstract: Provided is a method for manufacturing hydroxylamine. In this method, an aqueous reaction medium containing acidic buffer agent and nitrate ions in the presence of a limited amount of metal impurities such as Fe or Cu is introduced into a hydroxylamine synthesis reactor in the presence of catalyst to proceed hydroxylamine synthesis by reduction of nitrate ions with hydrogen gas as reducing agent in the aqueous reaction medium to produce hydroxylamine. The reaction is processed in the aqueous reaction medium with a limited amount of metal impurities or even without metal impurities, such that the selection rate of the hydroxylamine product is increased.
    Type: Application
    Filed: April 5, 2007
    Publication date: October 18, 2007
    Applicant: China Petrochemical Development Corporation
    Inventors: Shu-Hung Yang, Cheng-Fa Hsieh, Yi-Bau Hung
  • Publication number: 20070231240
    Abstract: A method for preparing hydroxylamine by reducing nitric acid or its salt with hydrogen gas in an aqueous medium in the presence of a catalyst, wherein reduction of nitric acid or its salt is performed in a reactor comprising a reaction section, a cooler disposed at the lower portion of the reactor, and a middle gas distributor and a lower gas distributor respectively disposed above and below the cooler for introducing hydrogen gas into the reaction section. According to the present invention, gas distribution become more uniform by disposing the gas distributors at different positions of the reactor, which results in higher yield of hydroxylamine.
    Type: Application
    Filed: September 21, 2006
    Publication date: October 4, 2007
    Inventors: Shu-Hung YANG, Shou-Li Luo
  • Patent number: 7172744
    Abstract: An improved ion exchange process for manufacturing and concentrating hydroxylamine from an aqueous solution comprising hydroxylammonium ion and counter anions is disclosed. The process involves the use of an aqueous hydroxylamine wash step which assists in controlling the processing temperature and leads to a more concentrated, purified aqueous hydroxylamine solution.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: February 6, 2007
    Assignee: BASF Aktiengesellschaft
    Inventor: Chin-Hsiung Chang
  • Patent number: 7105078
    Abstract: A process for preparing a salt-free aqueous hydroxylamine solution by reacting an aqueous solution of a hydroxylammonium salt with a base to give a mixture and separating from said mixture by distillation a salt-free aqueous hydroxylamine solution, involving using as a base an aqueous solution of a mixture of NaOH and KOH in a molar ratio Na+:K+ in the range from 70:30 to 95:5 and with a total concentration of Na+ and K+ in the range from 0.1 to 10 m/m % based on the total amount of the mixture.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: September 12, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl-Heinz Wostbrock, Eckhard Ströfer, Markus Weber, Steffen Kerth
  • Patent number: 7090817
    Abstract: The invention relates to a process for the preparation of hydroxylammonium, said process comprising the steps of: a) feeding gaseous hydrogen to a reaction mixture, said reaction mixture comprising an aqueous reaction medium and a gaseous phase; b) catalytically reducing, in said reaction mixture, nitrate or nitrogen oxide with hydrogen to form the hydroxylammonium; c) withdrawing a gas mixture from the reaction mixture, said gas mixture comprising gaseous hydrogen and gaseous non-hydrogen compounds; d) separating at least part of the gaseous non-hydrogen compounds from the gas mixture to obtain a hydrogen-enriched gas; and e) passing the hydrogen-enriched gas to a hydrogenation zone.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: August 15, 2006
    Assignee: DSM IP Assets B.V.
    Inventors: Arno Herald Benneker, Johannes A. L. Brouwers, Godefridus M. Van Dortmont
  • Patent number: 7037478
    Abstract: A process for the continuous preparation of hydroxylammonium salts by catalytic reduction of nitrogen monoxide by means of hydrogen in a dilute aqueous solution of mineral acid in a plurality of reaction stages connected in series comprises dividing the incoming stream of dilute aqueous solution of mineral acid into at least two substreams before it is fed into the plurality of reaction stages connected in series, feeding a first of these substreams to the first reaction stage, feeding a second of these substreams to a reaction stage other than the first, where the inflow of dilute aqueous solution of mineral acid into the plurality of reaction stages connected in series is controlled by means of the pH in this reaction stage other than the first.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: May 2, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael Bender, Hans Jörg Wilfinger, Albert Schenkel
  • Patent number: 7029557
    Abstract: The invention relates to a method for producing a highly pure, aqueous hydroxylamine solution by distilling an aqueous solution, devoid of salt, of a hydroxyl ammonium salt in a plate column comprising at least two mechanical plates. Said method is characterised in that packing bodies are arranged between at least two plates of the plate column over the cross-section of said column.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: April 18, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl-Heinz Wostbrock, Joachim Thiel, Heinz Krüger, Eckhard Ströfer, Markus Weber, Bernd Gerber, Bernd Rumpf, Bernd Sachweh, Steffen Kerth
  • Patent number: 6942762
    Abstract: A process for preparing a salt-free aqueous hydroxylamine solution by distilling an aqueous solution of a hydroxylammonium salt and a base in a tray column having at least two mechanical trays, wherein random or structured packings are located above at least one tray of the tray column over the cross section of the column.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: September 13, 2005
    Assignee: BASF Akteingesellschaft
    Inventors: Karl-Heinz Wostbrock, Joachim Thiel, Heinz Krüger, Eckhard Ströfer, Markus Weber, Bernd Gerber, Bernd Rumpf, Bernd Sachweh, Steffen Kerth
  • Patent number: 6787119
    Abstract: The present invention provides an ecofriendly method for preparing dinitramidic acid and its salts by nitration of ammonium sulfamate with fuming nitric acid as a nitrating agent using solid acid catalysts selected from the group consisting of a montmorillonite clay catalyst and metal ion exchanged K10 montmorillonite clay catalysts and surface supported catalysts and preparation of ammonium dinitramide by neutralization of the dinitramidic acid with ammonia and separation of ammonium dinitramide.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: September 7, 2004
    Assignee: Council of Scientific and Industrial Research
    Inventors: Boyapati Manoranjan Choudary, Mannepalli Lakshmi Kantam, Katuri Jeeva Ratnam, Vijayakumar Karasala, Sridhar Chidara, Venkatachalam Subbiah, Santosh Gopalakrishnan, Ramaswamy Rajagopalan, Ninan Ninan Kovoor, Kuchibhatla Sitarama Sastri
  • Publication number: 20040149563
    Abstract: A process for preparing a salt-free aqueous hydroxylamine solution by reacting an aqueous solution of a hydroxylammonium salt with a base to give a mixture and separating from said mixture by distillation a salt-free aqueous hydroxylamine solution, comprises using as a base an aqueous solution of a mixture of NaOH and KOH in a molar ratio Na+:K+ in the range from 70:30 to 95:5 and with a total concentration of Na+ and K+ in the range from 0.1 to 10 m/m % based on the total amount of the mixture.
    Type: Application
    Filed: December 30, 2003
    Publication date: August 5, 2004
    Inventors: Karl-Heinz Wostbrock, Eckhard Strofer, Markus Weber, Steffen Kerth
  • Patent number: 6758946
    Abstract: A process for working up hydroxylamine-containing solutions as obtained in particular in the electronics industry during the cleaning of electronic components is described. According to the invention, the hydroxylamine is stripped from the wastewater with steam. The products obtained are aqueous hydroxylamine and an aqueous solution of the amines. Both product streams can be purified in further process steps to give a saleable product.
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: July 6, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Otto Watzenberger, Heiner Schelling
  • Patent number: 6699452
    Abstract: Process for the separation of a hydroxylammonium salt solution from an aqueous reaction mixture comprising solid catalyst particles by means of filtration, wherein cake filtration through an asymmetric filter is applied, the asymmetric filter comprising at least two layers having different pore diameter, at least one layer being a filter layer, the pore diameter of the filter layer being between 0.1 and 10 &mgr;m and the thickness of the filter layer being 10 to 1000 &mgr;m.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: March 2, 2004
    Assignee: DSM N.V.
    Inventors: Theodorus F. M. Riesthuis, Werner J. J. Ploumen
  • Publication number: 20030175197
    Abstract: The present invention provides an ecofriendly method for preparing dinitramidic acid and its salts by nitration of ammonium sulfamate with fuming nitric acid as a nitrating agent using solid acid catalysts selected from the group consisting of a montmorillonite clay catalyst and metal ion exchanged K10 montmorillonite clay catalysts and surface supported catalysts and preparation of ammonium dinitramide by neutralization of the dinitramidic acid with ammonia and separation of ammonium dinitramide.
    Type: Application
    Filed: March 13, 2002
    Publication date: September 18, 2003
    Inventors: Boyapati Manoranjan Choudary, Mannepalli Lakshmi Kantam, Katuri Jeeva Ratnam, Vijayakumar Karasala, Sridhar Chidara, Venkatachalam Subbiah, Santosh Gopalakrishnan, Ramaswamy Rajagopalan, Ninan Ninan Kovoor, Kuchibhatla Sitarama Sastri
  • Patent number: 6531108
    Abstract: This invention provides a highly pure and highly concentrated free hydroxylamine aqueous solution substantially not containing any salt or organic substance. This invention is a process for obtaining a free hydroxylamine aqueous solution, comprising the steps of letting an aqueous solution or slurry containing hydroxylammonium sulfate and an alkali react with each other, to obtain an aqueous solution or slurry containing free hydroxylamine and dissolved or partially precipitated sulfates; mixing the obtained reaction solution and a lower alcohol, to precipitate solid sulfates; separating a solution containing the lower alcohol and some of water by distillation from the aqueous solution remaining after separating and removing the solid sulfates; and obtaining a free hydroxylamine aqueous solution from the remaining solution by distillation.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: March 11, 2003
    Assignee: Toray Fine Chemicals Co., Ltd.
    Inventors: Kumiko Bansho, Yoshio Noguchi
  • Patent number: 6524545
    Abstract: The present invention relates to a process for the preparation of an aqueous hydroxylamine solution which is essentially free of metal ions, wherein the hydroxylamine solution is subjected to at least one treatment with an acidic cation exchanger.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: February 25, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Otto Watzenberger, Hans-Michael Schneider