And Using Catalyst Patents (Class 423/376)
  • Patent number: 11000837
    Abstract: A catalyst for preparing chlorine gas by hydrogen chloride oxidation, comprising the following components calculated according to mass content based on the total weight of the catalyst: 0.5-20 wt % copper; 2-10 wt % manganese; 0.05-2 wt % boron; 0.01-3 wt % chromium; 0.1-10 wt % rare earth metal; 0.1-10 wt % potassium; and 3-15 wt % titanium; also comprising 0.02-1.1 wt % phosphorus; and 0.03-1.9 wt % iron; the carrier content is 55-90 wt %. In the case of a fluidized bed reactor, the present catalyst can achieve a one-way hydrogen chloride conversion rate of 80-85%. Almost all of the 0-1000 mg/kg of chlorinated benzene contained in hydrogen chloride gas can be converted into CO2 and H2O without generating polychlorinated benzene.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: May 11, 2021
    Inventors: Hongke Zhang, Bo Zhou, Zhangwei Zai, Dan Xu, Yu Yao, Yanlong Xu, Dongke Zhao, Jingjing Yang, Jiansheng Ding, Weiqi Hua
  • Patent number: 10710057
    Abstract: The invention relates to a catalyst material comprising a support, a first metal and a second metal on said support. The first and second metals are in the form of a chemical compound. The first metal is Fe, Co or Ni, and the second metal is selected from the group consisting of Sn, Zn and In. The invention also relates to a process for the preparation of hydrogen cyanide (HCN) from methane (CH4) and ammonia (NH3), wherein the methane and ammonia are contacted with a catalyst according to the invention.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: July 14, 2020
    Assignee: Haldor Topsoe A/S
    Inventors: Burcin Temel McKenna, Poul Erik Højlund Nielsen
  • Patent number: 9719704
    Abstract: Integrated systems and methods for onsite wastewater treatment in which a portion of onsite energy demands may be driven by energy harvested from the wastewater. Thermal energy of wastewater may be transferred from an onsite wastewater treatment system to an onsite heat pump to recover thermal energy, at least a portion of which may then be delivered to an onsite energy demand.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: August 1, 2017
    Assignee: NATURAL SYSTEMS UTILITIES, LLC
    Inventors: Eugenio Giraldo, Paul Knowles
  • Patent number: 9211527
    Abstract: A catalytic composition useful for the conversion of an olefin selected from the group consisting of propylene, isobutylene or mixtures thereof, to acrylonitrile, methacrylonitrile, and mixtures thereof. The catalytic composition comprises a complex of metal oxides comprising bismuth, molybdenum, iron, cerium and other promoters, wherein the ratio of bismuth to cerium ratio in the composition is greater than or equal to 0.45 and less than or equal to 1.5.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: December 15, 2015
    Assignee: INEOS EUROPE AG
    Inventors: James F. Brazdil, Jr., Mark A. Toft, Charles J. Besecker, Michael J. Seely
  • Patent number: 8906334
    Abstract: The invention includes an apparatus and process for the catalytic production of HCN from a feed gas of ammonia and a hydrocarbon gas by means of heat tubes supplying heat to the feed gas stream and heat tubes for removal of heat from the products. The invention further includes a process for N2O abatement comprising transferring heat from an exothermic N2O degradation reaction through a heat pipe.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: December 9, 2014
    Assignee: INVISTA North America S.a r.l.
    Inventor: Colin S. Slaten
  • Patent number: 8802020
    Abstract: A reactor for preparing hydrogen cyanide by the Andrussow process is provided. The reactor comprises at least one gas inlet which opens into a gas inlet region, an outlet for the reaction products and a catalyst, wherein at least one mixing element and at least one gas-permeable intermediate layer are within the reactor between the gas inlet region and the catalyst. The mixing element is arranged between the gas inlet region and the gas-permeable intermediate layer. A process for preparing HCN, in the reactor is also provided.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: August 12, 2014
    Assignee: Evonik Röhm GmbH
    Inventors: Thomas Schaefer, Robert Weber, Udo Gropp, Thomas Mertz
  • Publication number: 20140147365
    Abstract: The invention relates to a hydrocyanic acid containing bioresourced carbon, and to a method for producing a raw material mainly containing the same by reacting ammonia with methane or methanol optionally in the presence of air and/or oxygen, characterized in that at least one of the reagents selected from ammonia, methane and methanol is obtained from a biomass. The invention also relates to the uses of the raw material for producing acetone cyanohydrin, adiponitrile, methionine or methionine hydroxyl-analog, and sodium cyanide.
    Type: Application
    Filed: January 31, 2014
    Publication date: May 29, 2014
    Applicant: ARKEMA FRANCE
    Inventor: JEAN-LUC DUBOIS
  • Patent number: 8293678
    Abstract: A metal fiber based on one or several elements from the group of platinum, palladium, rhodium, ruthenium, and iridium with 0 to 30% by weight of one or several additional alloy elements from the group of nickel, cobalt, gold, rhenium, molybdenum, and tungsten, contains 1 to 500 ppm by weight of boron or phosphorus. A non-woven material or netting, in particular for the production of nitrogen oxide or for the production of hydrocyanic acid, is made of such fibers. For the production of fibers based on noble metals having up to 30% by weight of additional alloy metals by drawing the fibers from a melt, the melting point of the metal is reduced by at least 400 ° C., before drawing of the fibers, by additionally alloying with boron or phosphorus, and the boron or the phosphorus is removed again from the fibers.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: October 23, 2012
    Assignee: Heraeus Materials Technology GmbH & Co. KG
    Inventors: Uwe Jantsch, David Francis Lupton, Harald Manhardt, Stefan Vorberg
  • Publication number: 20120141345
    Abstract: The invention includes an apparatus and process for the catalytic production of HCN from a feed gas of ammonia and a hydrocarbon gas by means of heat tubes supplying heat to the feed gas stream and heat tubes for removal of heat from the products. The invention further includes a process for N2O abatement comprising transferring heat from an exothermic N2O degradation reaction through a heat pipe.
    Type: Application
    Filed: May 14, 2008
    Publication date: June 7, 2012
    Inventor: Colin S. Slaten
  • Publication number: 20110183221
    Abstract: The present invention relates to a catalytic porous layer for oxygen activation that can be used in solid oxide fuel cells (SOFC) and dense ceramic membranes for oxygen separation at a high temperature. This porous layer is mainly composed of an electron and oxygen ion mixed conductive material and has a structure selected from simple perovskite-type structures, double perovskite-type structures or perovskite-related structures, i.e. structures such as the Ruddlesden-Popper, Dion-Jacobson and Aurivillius type.
    Type: Application
    Filed: June 25, 2009
    Publication date: July 28, 2011
    Inventors: José Manuel Serra Alfaro, Vicente Bernardo Vert Belenguer, Sonia Escolástico Rozalén
  • Publication number: 20110171101
    Abstract: The present invention relates to a reactor (1) for preparing hydrogen cyanide by the Andrussow process, comprising a reactor vessel (2), at least one gas inlet (3) which opens into a gas inlet region (4), an outlet for the reaction products (5) and a catalyst (6), wherein at least one mixing element (7) and at least one gas-permeable intermediate layer (8) are provided within the reactor vessel (2) between the gas inlet region (4) and the catalyst (6), the mixing element (7) being arranged between the gas inlet region (4) and the gas-permeable intermediate layer (8). The present invention further relates to a process for preparing HCN, in which an inventive reactor is used.
    Type: Application
    Filed: May 9, 2008
    Publication date: July 14, 2011
    Applicant: Evonik Roehm GmbH
    Inventors: Thomas Schaefer, Robert Weber, Udo Gropp, Thomas Mertz
  • Publication number: 20110150743
    Abstract: The invention relates to a hydrocyanic acid containing bioresource carbon, and to a method for producing a raw material mainly containing the same by reacting ammonia with methane or methanol optionally in the presence of air and/or oxygen, characterized in that at least one of the reagents selected from ammonia, methane and methanol is obtained from a biomass. The invention also relates to the uses of the raw material for producing acetone cyanohydrin, adiponitrile, methionine or methionine hydroxyl-analog, and sodium cyanide.
    Type: Application
    Filed: May 19, 2009
    Publication date: June 23, 2011
    Applicant: Arkema France
    Inventor: Jean-Luc Dubois
  • Patent number: 7763225
    Abstract: A process for the ammoxidation of an alcohol feed, such as methanol, or a nitrile feed, such as propionitrile, or a mixture thereof, to form hydrogen cyanide uses a modified Mn—P catalyst having the following empirical formula: MnaP1AbOx where A=one or more of K, Ca, Mo, Zn, Fe or mixtures thereof; a=1 to 1.5; b=0.01 to 1.0 and x is a total number of oxygen atoms determined by the oxidation states of the other elements present.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: July 27, 2010
    Assignee: Ascend Performance Materials LLC
    Inventors: Natalya Koryabkina, Mikhail Khramov, Valerie Monical
  • Publication number: 20100086468
    Abstract: The present invention relates to a process for preparing hydrogen cyanide by the Andrussow process by reacting methane-containing gas, ammonia and oxygen-containing gas over a catalyst at elevated temperature, wherein the proportion by volume of oxygen in relation to the total volume of nitrogen and oxygen (O2/(O2+N2)) is in the range of 0.2 to 1.0 and the reaction is performed with a non-ignitable reactant gas mixture.
    Type: Application
    Filed: January 22, 2008
    Publication date: April 8, 2010
    Applicant: Evonik Roehm GmbH
    Inventors: Thomas Schaefer, Hermann Siegert, Thomas Krauss
  • Publication number: 20090304569
    Abstract: The inventors have discovered catalyst ignition promoters comprising one or more activated metals. The catalyst ignition promoters are easily prepared from a number of metal sources, including spent catalysts, are activated quickly and provide effective catalyst ignition independent of the quality of the metals that comprise the catalytic converter. The one or more activated metals comprising the ignition promoter are prepared by contacting them with one or more chemical treatments. The activated metal components are prepared into suitable articles, referred to as ignition strips, that are placed in contact with one or more oxidative coupling catalysts, typically in the form of gauzes. The ignition promoters reduce the activation energy for catalyst ignition (also referred to “light off”), enabling ignition of catalyst gauzes that are new, used, contaminated, damaged and combinations thereof at a relatively low auto-ignition temperatures.
    Type: Application
    Filed: July 10, 2009
    Publication date: December 10, 2009
    Inventor: Abraham Benderly
  • Publication number: 20080317656
    Abstract: A process for the ammoxidation of an alcohol feed, such as methanol, or a nitrile feed, such as propionitrile, or a mixture thereof, to form hydrogen cyamide uses a modified Mn—P catalyst having the following empirical formula: MnaP1AbOx where A=one or more of K, Ca, Mo, Zn, Fe or mixtures thereof; a=1 to 1.5; b=0.01 to 1.0 and x is a total number of oxygen atoms determined by the oxidation states of the other elements present.
    Type: Application
    Filed: June 25, 2007
    Publication date: December 25, 2008
    Applicant: Solutia, Inc.
    Inventors: Natalya Koryabkina, Mikhail Khramov, Valerie Monical
  • Patent number: 7429370
    Abstract: The invention relates to an improvement to the BMA process for the production of hydrogen cyanide from methane and ammonia in the presence of a platinum-containing catalyst. The problem of sooting, and thus the decrease in activity, of the catalysts can be reduced, or the activity increased, in that the catalyst is doped with an element from the series Cu, Ag, Au, Pd and W. The doping is preferably in the range of 0.01 to 20 mole % doping element, based on Pt.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: September 30, 2008
    Assignee: Degussa AG
    Inventors: Lukas Von Hippel, Robert Weber, Martin Bewersdorf, Ernst Gail, Helmut Schwarz
  • Patent number: 7101525
    Abstract: The present invention relates to a catalytic device for the implementation of a reaction in a gaseous medium at high temperature, such as, for example, the synthesis of HCN or the oxidation of ammonia, comprising: at least one textured material (1) which is effective as catalyst for the said reaction, a support (2) comprising at least one ceramic part (3), the structure of which makes possible the passage of the gases, the said part (3) of the said support (2) having a corrugated face (6), so that the increase in surface area (?) produced by the corrugations with respect to a flat surface is at least equal to that (?) calculated for sawtooth corrugations and of between approximately 1.1 and approximately 3, the said textured material (1) being positioned so that it is held against the corrugated face (6) of the said part (3) of the said support (2) and follows the form thereof.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: September 5, 2006
    Assignee: Butachimie
    Inventor: Joseph Steffen
  • Patent number: 7063827
    Abstract: A conical reactor head for use in chemical processes or other systems is provided. The reactor head includes a robust internal insulator to boost efficiency while maintaining safety by allowing the reactor head to self-radiate at high temperatures. The reactor head also includes a plurality of support lugs to protect its bottom flange from scratches or other damage when the reactor head is set on the ground. The reactor head is adapted to connect to a catalyst-containing barrel which is specially designed to facilitate easy installation and removal of catalysts or other equipment from outside the barrel. The reactor may be coupled with a rotation vane to induce laminar flow at the inlet of the reactor to increase reactor efficiency and prolong catalyst life.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: June 20, 2006
    Assignee: Rohm and Haas Company
    Inventors: David Mark Bergeron, Michael Stanley DeCourcy, Aaron Angel Quintanilla, Paul Francis Valerio, James Woodrow Vinson, Jr., David Alec Williams
  • Patent number: 6979432
    Abstract: A process for the production of hydrogen cyanide is provided, wherein hydrogen cyanide is synthesized by reacting methane or methane-containing natural gas, ammonia and oxygen-enriched air or oxygen in the presence of a catalyst comprising platinum or a platinum alloy; wherein the reactants are present in the following molar ratios [ O 2 ] [ O 2 + N 2 ] = 0.25 ? ? to ? ? 1.0 ; [ CH 4 ] [ NH 3 ] = 0.95 ? ? to ? ? 1.05 ; and where a molar ratio of ammonia to the sum of oxygen and nitrogen obeys the following relationship: Y=m·X?a, wherein Y = [ NH 3 ] [ O 2 + N 2 ] X = [ O 2 ] [ O 2 + N 2 ] m=1.25 to 1.40; and a=0.05 to 0.14.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: December 27, 2005
    Assignee: Roehm GmbH & Co. KG
    Inventors: Thomas Schaefer, Hermann Siegert
  • Patent number: 6960333
    Abstract: Disclosed are means for improving the service-life of indirect tubesheet type heat exchangers used in chemical reactors, particularly those exposed to reducing, nitridizing and/or carburizing environments. Such means include the use of certain ferrules within the heat exchange tubes and/or weld types used in construction of these heat exchangers.
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: November 1, 2005
    Assignee: Rohm and Haas Company
    Inventors: Paul Joseph Blanda, Jr., Michael Stanley DeCourcy
  • Publication number: 20040208814
    Abstract: A process for the production of hydrogen cyanide is provided, wherein hydrogen cyanide is synthesized by reacting methane or methane-containing natural gas, ammonia and oxygen-enriched air or oxygen in the presence of a catalyst comprising platinum or a platinum alloy; wherein the reactants are present in the following molar ratios 1 [ O 2 ] [ O 2 + N 2 ] = 0.25 ⁢   ⁢ to ⁢   ⁢ 1.0 ; [ CH 4 ] [ NH 3 ] = 0.95 ⁢   ⁢ to ⁢   ⁢ 1.
    Type: Application
    Filed: December 12, 2003
    Publication date: October 21, 2004
    Applicant: ROEHM GMBH & CO. KG
    Inventors: Thomas Schaefer, Hermann Siegert
  • Patent number: 6743407
    Abstract: A process for the production of hydrogen cyanide is provided, wherein hydrogen cyanide is synthesized by reacting methane or methane-containing natural gas, ammonia and oxygen-enriched air or oxygen in the presence of a catalyst comprising platinum or a platinum alloy; wherein the reactants are present in the following molar ratios [ O 2 ] [ O 2 + N 2 ] = 0.25 ⁢   ⁢ to ⁢   ⁢ 1.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: June 1, 2004
    Assignee: Roehm GmbH & Co. KG
    Inventors: Thomas Schaefer, Hermann Siegert
  • Patent number: 6716405
    Abstract: A process for removing unreacted ammonia from an effluent of a catalyst bed used in a hydrocarbon ammoxidation reaction is provided. The process includes a step of providing a fluidized bed reactor. The reactor includes the catalyst bed for reacting ammonia and hydrocarbons therein. The reactor also includes a dilute phase of the catalyst bed disposed above the catalyst bed. The reactor further includes a set of internals disposed at least partially within the dilute phase of the catalyst bed. The reactor additionally includes an inlet of a first-stage cyclone separator disposed above the set of internals. The process also includes a step of removing the unreacted ammonia from the effluent of the catalyst bed by passing the effluent through the set of internals. The ammonia and hydrocarbons present in the effluent contact the dilute phase of the catalyst bed and react therein.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: April 6, 2004
    Assignees: China Petro-Chemical Corporation, Shanghai Research Institute of Petrochemical Technology, SINOPEC
    Inventors: Xin Chen, Linghua Wu
  • Patent number: 6667020
    Abstract: A process increasing the yield of both HCN and acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a crude ketone and/or a mixture of at least two ketones, ammonia and air, into a reaction zone containing an ammoxidation catalyst, reacting the. hydrocarbon, the ketone, ammonia and oxygen over said catalyst at an elevated temperature to produce acrylonitrile, hydrogen cyanide and acetonitrile, and recovering the acrylonitrile, hydrogen cyanide and acetonitrile from the reactor.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: December 23, 2003
    Assignee: The Standard Oil Company
    Inventors: Michael J. Seely, Sanjay Purushottam Godbole, Dev Dhanaraj Suresh
  • Patent number: 6656442
    Abstract: A catalytic process and apparatus therefor for the manufacture of hydrogen cyanide. In the process an oxygen rich oxidant stream and at least one oxidant-free feed steam containing methane and ammonia are separately preheated and rapidly mixed to form a detonable mixed stream at a temperature which is at least 50° C. below the autoignition temperature of the mixed stream. The mixed stream is then conveyed to a catalyst capable of catalysing the formation of hydrogen cyanide at such a velocity that detonation is avoided. The process is more energy efficient and gives rise to an effluent stream containing more hydrogen than the conventional Andrussow process.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: December 2, 2003
    Assignee: Imperial Chemical Industries PLC
    Inventors: Christopher Cowell, Ralph Doy
  • Publication number: 20030219372
    Abstract: A process for increasing the yield of acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a carboxylic acid, ammonia and air into a reaction zone containing an ammoxidation catalyst, reacting the hydrocarbon, carboxylic acid, ammonia and oxygen over said catalyst at an elevated temperature to produce acrylonitrile, hydrogen cyanide and acetonitrile, and recovering the acrylonitrile, hydrogen cyanide and acetonitrile from the reactor.
    Type: Application
    Filed: May 15, 2003
    Publication date: November 27, 2003
    Inventors: Michael J. Seely, Sanjay P. Godbole, Christos Paparizos
  • Patent number: 6649137
    Abstract: A conical reactor head for use in chemical processes or other systems is provided. The reactor head includes a robust internal insulator to boost efficiency while maintaining safety by allowing the reactor head to self-radiate at high temperatures. The reactor head also includes a plurality of support lugs to protect its bottom flange from scratches or other damage when the reactor head is set on the ground. The reactor head is adapted to connect to a catalyst-containing barrel which is specially designed to facilitate easy installation and removal of catalysts or other equipment from outside the barrel.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: November 18, 2003
    Assignee: Rohm and Haas Company
    Inventors: David Mark Bergeron, Michael Stanley DeCourcy, Aaron Angel Quintanilla, Paul Francis Valerio, James Woodrow Vinson, Jr., David Alec Williams
  • Publication number: 20030198586
    Abstract: A process increasing the yield of both HCN and acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a crude ketone and/or a mixture of at least two ketones, ammonia and air, into a reaction zone containing an ammoxidation catalyst, reacting the hydrocarbon, the ketone, ammonia and oxygen over said catalyst at an elevated temperature to produce acrylonitrile, hydrogen cyanide and acetonitrile, and recovering the acrylonitrile, hydrogen cyanide and acetonitrile from the reactor.
    Type: Application
    Filed: December 10, 2001
    Publication date: October 23, 2003
    Inventors: Michael J. Seely, Sanjay Purushottam Godbole, Dev Dhanaraj Suresh
  • Publication number: 20030175195
    Abstract: The present invention relates to a catalytic device for the implementation of a reaction in a gaseous medium at high temperature, such as, for example, the synthesis of HCN or the oxidation of ammonia, comprising: at least one textured material (1) which is effective as catalyst for the said reaction, a support (2) comprising at least one ceramic part (3), the structure of which makes possible the passage of the gases, the said part (3) of the said support (2) having a corrugated face (6), so that the increase in surface area (&bgr;) produced by the corrugations with respect to a flat surface is at least equal to that (&agr;) calculated for sawtooth corrugations and of between approximately 1.1 and approximately 3, the said textured material (1) being positioned so that it is held against the corrugated face (6) of the said part (3) of the said support (2) and follows the form thereof.
    Type: Application
    Filed: May 9, 2003
    Publication date: September 18, 2003
    Inventor: Joseph Steffen
  • Publication number: 20030175196
    Abstract: Elevated temperature, gas-phase, catalyzed processes for preparing HCN in which induction heating is used as a source of energy, and novel apparatus for carrying out said processes.
    Type: Application
    Filed: March 14, 2002
    Publication date: September 18, 2003
    Inventors: Benny E. Blackwell, Cynthia K. Fallon, Gregory S. Kirby, Mehrdad Mehdizadeh, Theodore Augur Koch, Carmo Joseph Pereira, Sourav K. Sengupta
  • Patent number: 6596251
    Abstract: A process for the synthesis of hydrogen cyanide by the Andrussow process by reaction of methane or methane-containing natural gas, ammonia and oxygen or oxygen-enriched air on a catalyst at an elevated temperature, wherein O 2 O 2 + N 2 = 0.25 - 1.0 ⁢   ⁢ ( vol / vol ) .
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: July 22, 2003
    Assignee: Roehm GmbH & Co. KG
    Inventors: Thomas Schaefer, Thomas Krauss
  • Patent number: 6534028
    Abstract: A reactor for performing endothermic catalytic reactions is disclosed formed of a monolithic counterflow reactor with parallel heating and reaction channels. The internal walls of the reaction channels are coated with a catalyst for the catalytic reaction to be performed, while the internal walls of the heating channels have a catalyst for the catalytic combustion of a fuel gas/air mixture.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: March 18, 2003
    Assignee: Degussa AG
    Inventors: Lukas von Hippel, Dietrich Arntz, Bernd Kuttruf, Brigitta Walter
  • Patent number: 6491876
    Abstract: A catalytic process and apparatus therefor for the manufacture of hydrogen cyanide. In the process an oxygen rich oxidant stream and at least one oxidant-free feed stream containing methane and ammonia are separately preheated and rapidly mixed to form a detonable mixed stream at a temperature which is at least 50° C. below the autoignition temperature of the mixed stream. The mixed stream is then conveyed to a catalyst capable of catalyzing the formation of hydrogen cyanide at such a velocity that detonation is avoided. The process is more energy efficient and gives rise to an effluent stream containing more hydrogen than the conventional Andrussow process.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: December 10, 2002
    Assignee: Imperial Chemical Industries PLC
    Inventors: Christopher Cowell, Ralph Doy
  • Publication number: 20020182137
    Abstract: A catalytic process and apparatus therefor for the manufacture of hydrogen cyanide. In the process an oxygen rich oxidant stream and at least one oxidant-free feed steam containing methane and ammonia are separately preheated and rapidly mixed to form a detonable mixed stream at a temperature which is at least 50° C. below the autoignition temperature of the mixed stream. The mixed stream is then conveyed to a catalyst capable of catalysing the formation of hydrogen cyanide at such a velocity that detonation is avoided. The process is more energy efficient and gives rise to an effluent stream containing more hydrogen than the conventional Andrussow process.
    Type: Application
    Filed: May 28, 2002
    Publication date: December 5, 2002
    Applicant: Imperial Chemical Industries Plc
    Inventors: Christopher Cowell, Ralph Doy
  • Patent number: 6455020
    Abstract: The use of ceramic meshes is offered for spacing catalyst meshes apart from one another in the production of HCN, especially by the Andrussov process.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: September 24, 2002
    Assignee: W. C. Heraeus GmbH & Co. KG
    Inventors: Marek Gorywoda, Jonathan Lund
  • Patent number: 6413485
    Abstract: A process increasing the yield of both HCN and acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a crude ketone and/or a mixture of at least two ketones, ammonia and air, into a reaction zone containing an ammoxidation catalyst, reacting the hydrocarbon, the ketone, ammonia and oxygen over said catalyst at an elevated temperature to produce acrylonitrile, hydrogen cyanide and acetonitrile, and recovering the acrylonitrile, hydrogen cyanide and acetonitrile from the reactor.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: July 2, 2002
    Assignee: The Standard Oil Company
    Inventors: Michael J. Seely, Sanjay Purushottam Godbole, Dev Dhanaraj Suresh
  • Publication number: 20020054848
    Abstract: A process for the production of hydrogen cyanide is provided, wherein hydrogen cyanide is synthesized by reacting methane or methane-containing natural gas, ammonia and oxygen-enriched air or oxygen in the presence of a catalyst comprising platinum or a platinum alloy; wherein the reactants are present in the following molar ratios 1 [ O 2 ] [ O 2 + N 2 ] = 0.25 ⁢   ⁢ to ⁢   ⁢ 1.0 ; [ CH 4 ] [ NH 3 ] = 0.95 ⁢   ⁢ to ⁢   ⁢ 1.
    Type: Application
    Filed: July 13, 2001
    Publication date: May 9, 2002
    Applicant: ROEHM GMBH & CO. KG
    Inventors: Thomas Schaefer, Hermann Siegert
  • Publication number: 20020048544
    Abstract: A process for the synthesis of hydrogen cyanide by the Andrussow process by reaction of methane or methane-containing natural gas, ammonia and oxygen or oxygen-enriched air on a catalyst at an elevated temperature, wherein 1 O 2 O 2 + N 2 = 0.25 - 1.0 ⁢   ⁢ ( vol / vol ) .
    Type: Application
    Filed: July 13, 2001
    Publication date: April 25, 2002
    Applicant: ROEHM GMBH & CO. KG
    Inventors: Thomas Schaefer, Thomas Krauss
  • Publication number: 20020039553
    Abstract: A catalytic process and apparatus therefor for the manufacture of hydrogen cyanide. In the process an oxygen rich oxidant stream and at least one oxidant-free feed stream containing methane and ammonia are separately preheated and rapidly mixed to form a detonable mixed stream at a temperature which is at least 50° C. below the autoignition temperature of the mixed stream. The mixed stream is then conveyed to a catalyst capable of catalysing the formation of hydrogen cyanide at such a velocity that detonation is avoided. The process is more energy efficient and gives rise to an effluent stream containing more hydrogen than the conventional Andrussow process.
    Type: Application
    Filed: December 21, 1998
    Publication date: April 4, 2002
    Inventors: CHRISTOPHER COWELL, RALPH DOY
  • Publication number: 20020031455
    Abstract: A reactor for performing endothermic catalytic reactions is disclosed formed of a monolithic counterflow reactor with parallel heating and reaction channels. The internal walls of the reaction channels are coated with a catalyst for the catalytic reaction to be performed, while the internal walls of the heating channels have a catalyst for the catalytic combustion of a fuel gas/air mixture.
    Type: Application
    Filed: June 29, 2001
    Publication date: March 14, 2002
    Inventors: Lukas von Hippel, Dietrich Arntz, Bernd Kuttruf, Brigitta Walter
  • Publication number: 20020004027
    Abstract: A process increasing the yield of both HCN and acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a crude ketone and/or a mixture of at least two ketones, ammonia and air, into a reaction zone containing an ammoxidation catalyst, reacting the hydrocarbon, the ketone, ammonia and oxygen over said catalyst at an elevated temperature to produce acrylonitrile, hydrogen cyanide and acetonitrile, and recovering the acrylonitrile, hydrogen cyanide and acetonitrile from the reactor.
    Type: Application
    Filed: May 27, 1999
    Publication date: January 10, 2002
    Inventors: MICHAEL J. SEELY, SANJAY PURUSHOTTAM GODBOLE, DEV DHANARAJ SURESH
  • Publication number: 20010043902
    Abstract: This invention relates to an improved catalyst system utilizing flow through radiation shielding of the reaction zone and to processes for using the catalyst system for the production of hydrogen cyanide. The process has decreased methane usage while maintaining yield of cyanide.
    Type: Application
    Filed: April 9, 2001
    Publication date: November 22, 2001
    Inventors: Michael Stanley DeCourcy, Michel Gene Woody, Karen Ann Shaw, Joy Lyndon Mendoza
  • Patent number: 6315972
    Abstract: This invention relates to improvements in processes and catalysts for elevated temperature, gas phase, catalyzed reactions in general; it is particularly illustrated by reference to the manufacture of hydrogen cyanide.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: November 13, 2001
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Mehrdad Mehdizadeh, Theodore A. Koch, Karl Robert Krause, Sourav Kumar Sengupta, Benny Earl Blackwell
  • Patent number: 6287531
    Abstract: Hydrogen cyanide is produced by reacting ammonia and a hydrocarbon gas in the presence of a platinum-group-metal catalyst while the catalyst is heated by induction heating at a frequency of 0.5 to 30 MHz.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: September 11, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ronald Jack Riegert, Mehrdad Mehdizadeh
  • Patent number: 6238574
    Abstract: A process for upgrading aqueous acrylonitrile waste streams containing organic material comprising atomizing an acrylonitrile waste water stream containing organic material, introducing the atomized acrylonitrile waste water stream at a temperature below the decomposition temperature of the organics present in the waste water stream, into a reaction zone containing a catalyst and at least one reactant gas, reacting the atomized waste water stream and reactant gas in the presence of the catalyst to convert at least some of the organics in the waste water stream into at least one compound selected from the group consisting of acetonitrile, hydrogen cyanide and acrylonitrile.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: May 29, 2001
    Assignee: The Standard Oil Company
    Inventors: Mark Clark Cesa, Anne Marie Graham, Albert Richard Shuki
  • Patent number: 6221327
    Abstract: This invention relates to an improved catalyst system utilizing flow through radiation shielding of the reaction zone and to processes for using the catalyst system for the production of hydrogen cyanide. The process has decreased methane usage while maintaining yield of cyanide.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: April 24, 2001
    Assignee: Rohm and Haas Company
    Inventors: Michael Stanley DeCourcy, Michael Gene Woody, Karen Ann Shaw, Joy Lyndon Mendoza
  • Patent number: 6056932
    Abstract: A reactor for performing endothermic catalytic reactions is disclosed formed of a monolithic counterflow reactor with parallel heating and reaction channels. The internal walls of the reaction channels are coated with a catalyst for the catalytic reaction to be performed, while the internal walls of the heating channels have a catalyst for the catalytic combustion of a fuel gas/air mixture.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: May 2, 2000
    Assignee: Degussa-Huls Aktiengesellschaft
    Inventors: Lukas von Hippel, Dietrich Arntz, Bernd Kuttruf, Brigitta Walter
  • Patent number: 6048512
    Abstract: A process for preparing catalytically active coatings for the synthesis of hydrogen cyanide on moulded items substantially consisting of aluminum oxide. The catalytically active coatings contain, as active components, at least one platinum group metal and a nitride waich are applied to the moulded item by means of a coating dispersion which contains the active components as finely divided solids. This means that the hitherto conventional production of aluminum nitride during the forming process is not required. The coatings therefore achieve their final activity level, which is well above that of conventional coatings, very rapidly. In addition, these catalysts can be started up under high load and have a lower operating temperature.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: April 11, 2000
    Assignee: Degussa Aktiengesellschaft
    Inventors: Lukas von Hippel, Christian Bussek, Jorg Sauer, Manfred Sauer, Dietrich Arntz
  • Patent number: 5976482
    Abstract: A process for producing prussic acid by subjecting methanol to a gas-phase contact reaction with molecular oxygen and ammonia in the presence of a catalyst, wherein said catalyst is an oxide composition containing iron, antimony, phosphorus and vanadium with a content of vanadium content being at least 0.6 in terms of atomic ratio relative to iron content taken as 10, and a mixed raw material gas for the gas-phase contact reaction contains oxygen at an oxygen-to-methanol molar ratio of less than 1.6.
    Type: Grant
    Filed: March 12, 1998
    Date of Patent: November 2, 1999
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Yutaka Sasaki, Hiroshi Utsumi, Kazuo Morishita, Kenichi Miyaki