Catalyst Utilized Patents (Class 570/165)
  • Patent number: 10189757
    Abstract: A chromia-based fluorination catalyst comprising at least one additional metal selected from zinc, nickel, aluminum and magnesium in which from 0.1 to 8.0% by weight of the catalyst is in the form of one or more crystalline compounds of chromium and/or one or more crystalline compounds of the at least one additional metal. The catalyst can be used in processes for producing a fluorinated hydrocarbon.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: January 29, 2019
    Assignee: Mexichem Amanco Holding S.A. de C.V.
    Inventors: Andrew P Sharratt, John D Scott
  • Patent number: 9771309
    Abstract: A chromia-based fluorination catalyst comprising at least one additional metal selected from zinc, nickel, aluminum and magnesium in which from 0.1 to 8.0% by weight of the catalyst is in the form of one or more crystalline compounds of chromium and/or one or more crystalline compounds of the at least one additional metal. The catalyst can be used in processes for producing a fluorinated hydrocarbon.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: September 26, 2017
    Assignee: MEXICHEM AMANCO HOLDING S.A. DE C.V.
    Inventors: Andrew P Sharratt, John D Scott
  • Patent number: 9233895
    Abstract: The invention relates to a process to produce HCFC-244bb from HCFO-1233xf wherein, in one embodiment, one or more co-feed species having a normal boiling point of between about ?80° C. to about 0° C., such as HFC-245cb, is added to the reaction at a pressure of at least about 100 psig; and in another embodiment it is added to maintain a mole ratio of HFC-245cb to HCFO-1233xf of between about 0.005:1 to about 1:1. The HFC-245cb may be added as recycled by-product of the reaction and/or added as fresh feed. The HFC-245cb provides elevated pressures to the reaction thereby facilitating reactor operation, mixing and HCFC-244bb product removal. Other co-feed species are also disclosed.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: January 12, 2016
    Assignee: HONEYWELL INTERNATIONAL, INC.
    Inventors: Haluk Kopkalli, Daniel C. Merkel, Ron Joseph Roof
  • Patent number: 9040760
    Abstract: This invention provides a process for producing 2,3,3,3-tetrafluoropropene, the process comprising: (1) a first reaction step of reacting hydrogen fluoride with at least one chlorine-containing compound selected from the group consisting of a chloropropane represented by Formula (1): CClX2CHClCH2Cl, wherein each X is the same or different and is CI or F, a chloropropene represented by Formula (2): CClY2CCl?CH2, wherein each Y is the same or different and is CI or F, and a chloropropene represented by Formula (3): CZ2?CClCH2Cl, wherein each Z is the same or different and is CI or F in a gas phase in the absence of a catalyst while heating; and (2) a second reaction step of reacting hydrogen fluoride with a reaction product obtained in the first reaction step in a gas phase in the presence of a fluorination catalyst while heating. According to the process of this invention, 2,3,3,3-tetrafluoropropene (HFO-1234yf) can be obtained with high selectivity, and catalyst deterioration can be suppressed.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: May 26, 2015
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Kazuhiro Takahashi, Yuzo Komatsu, Akinori Ueda
  • Patent number: 9018428
    Abstract: Disclosed is a reactor and agitator useful in a high pressure process for making 1-chloro-3,3,3-trifluoropropene (1233zd) from the reaction of 1,1,1,3,3-pentachloropropane (240fa) and HF, wherein the agitator includes one or more of the following design improvements: (a) double mechanical seals with an inert barrier fluid or a single seal; (b) ceramics on the rotating faces of the seal; (c) ceramics on the static faces of seal; (d) wetted o-rings constructed of spring-energized Teflon and PTFE wedge or dynamic o-ring designs; and (e) wetted metal surfaces of the agitator constructed of a corrosion resistant alloy.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: April 28, 2015
    Assignee: Honeywell International Inc.
    Inventor: Stephen A. Cottrell
  • Publication number: 20150094502
    Abstract: The present invention provides a process of fluorination in liquid phase in a solvent medium of a compound of formula (II) CX1X2=CZCX3X4X5, in which Z represents H, Cl or F, and each X1 represents independently hydrogen or chlorine, given that at least one of the X1 represents a chlorine.
    Type: Application
    Filed: October 8, 2014
    Publication date: April 2, 2015
    Applicant: ARKEMA FRANCE
    Inventor: Anne PIGAMO
  • Patent number: 8987533
    Abstract: A production method of 1-chloro-3,3,3-trifluoropropene according to the present invention includes reaction of 1,1,1,3,3-pentachloropropane with hydrogen fluoride, characterized in that the concentrations of respective catalytic components in the 1,1,1,3,3-pentachloropropane as the raw material is controlled to a predetermined level or less. By controlling the concentrations of the respective catalytic components in the 1,1,1,3,3-pentachloropropane to the predetermined level or less, it is possible to improve the problems of shortening of catalyst life, retardation of reaction and scaling or corrosion of equipment in the production of the 1-chloro-3,3,3-trifluoropropene. In addition, the 1,1,1,3,3-pentachloropropane can be obtained selectively with high yield by telomerization reaction of carbon tetrachloride and vinyl chloride. The present invention is thus useful as the method for industrially advantageous, high-yield production of the 1-chloro-3,3,3-trifluoropropene.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: March 24, 2015
    Assignee: Central Glass Company, Limited
    Inventors: Yasuo Hibino, Satoshi Yoshikawa, Fuyuhiko Sakyu
  • Publication number: 20150057472
    Abstract: The invention relates to the use of a liquid-vapor separator such as a de-entrainer to remove an unvaporized portion of a feed, e.g. 1,1,2,3-tetrachloropropene (1230xa), to a catalytic vapor phase fluorination reaction where e.g. 2-chloro-3,3,3,-trifluoropropene (1233xf) is produced. The invention extends the life of the catalyst.
    Type: Application
    Filed: April 18, 2014
    Publication date: February 26, 2015
    Applicant: Honeywell International Inc.
    Inventors: Selma Bektesevic, Haluk Kopkalli, Haiyou Wang
  • Patent number: 8889925
    Abstract: The present invention provides a process of fluorination in liquid phase in a solvent medium of a compound of formula (II) CX1X2?CZCX3X4X5, in which Z represents H, Cl or F, and each X1 represents independently hydrogen or chlorine, given that at least one of the X1 represents a chlorine.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: November 18, 2014
    Assignee: Arkema France
    Inventor: Anne Pigamo
  • Patent number: 8779218
    Abstract: Process of catalytic fluorination in liquid phase of product 1,1,1,2,3-pentachloropropane or/and 1,1,2,2,3-pentachloropropane into product 2-chloro-3,3,3-trifluoropropene in presence of a catalyst.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: July 15, 2014
    Assignee: Arkema France
    Inventors: Anne Pigamo, Laurent Wendlinger, Philippe Bonnet
  • Patent number: 8772554
    Abstract: The present invention provides a method for efficiently preparing 2,3,3,3-tetrafluoropropene (HFO-1234yf) by a simple and economically advantageous method that is suitable for implementation on an industrial scale. The present invention provides a process for preparing 2,3,3,3-tetrafluoropropene, comprising the step of: (1) in a reactor, (1-1) reacting 1,1,1,2,3-penta-chloropropane with hydrogen fluoride in an amount of 10 to 100 mol per mole of the 1,1,1,2,3-pentachloropropane 1; (1-2) in the presence of chromic oxide represented by composition formula: CrOm (1.5<m<3) or fluorinated chromic oxide obtained by fluorinating the chromic oxide; (1-3) in the presence of oxygen in an amount of 0.02 to 1 mol per mole of the 1,1,1,2,3-pentachloropropane; and (1-4) in the gas phase within a temperature range of 320 to 390 degrees centigrade, thereby obtaining a reaction product containing 2,3,3,3-tetrafluoropropene.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: July 8, 2014
    Assignee: Daikin Industries, Ltd.
    Inventors: Masatoshi Nose, Yuzo Komatsu
  • Patent number: 8697923
    Abstract: The invention provides a process for the preparation of 2,3,3,3-tetrafluoropropene (1234yf) comprising (a) contacting 1,1,1-trifluoro-2,3-difluoropropane (243db) with hydrogen fluoride (HF) in the presence of a zinc/chromia catalyst to produce a compound having the formula CF3CHFCH2X, wherein X is Cl or F, and (b) dehydrohalogenating the compound of formula CF3CHFCH2X to produce 1234yf.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: April 15, 2014
    Assignee: Mexichem Amanco Holding S.A. de C.V.
    Inventors: John W. Smith, Claire McGuiness, Andrew P. Sharratt
  • Publication number: 20140100393
    Abstract: The invention provides an improved process to manufacture 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb) by reacting 2-chloro-3,3,3,-trifluoropropene (HCFO-1233xf) with hydrogen fluoride, in the presence of a fluorination catalyst, where by using 2-chloro-3,3,3,-trifluoropropene (HCFO-1233xf) of high purity, the need to add an oxidizing agent (typically chlorine) to keep the catalyst active can be avoided. The HCFC-244bb is then used as an intermediate in the production of 2,3,3,3-tetrafluoropropene-1 (HFO-1234yf).
    Type: Application
    Filed: June 28, 2010
    Publication date: April 10, 2014
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Robert C. Johnson, Daniel C. Merkel
  • Patent number: 8653311
    Abstract: The present invention relates to an azeotropic or azeotrope-like mixture consisting essentially of 1,1,1,2,3,3-hexafluoropropane, hexafluoropropene and hydrogen fluoride.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: February 18, 2014
    Assignee: Honeywell International Inc.
    Inventors: Ryan Hulse, Hang T. Pham, Rajiv R. Singh, Hsueh S. Tung, Daniel C. Merkel, Konstantin A. Pokrovski
  • Patent number: 8648221
    Abstract: Disclosed is an integrated process to co-produce trans-1-chloro-3,3,3-trifluoro-propene (1233zd(E)), trans-1,3,3,3-tetrafluoropropene (1234ze(E)), and 1,1,1,3,3-pentafluoropropane (245fa). Overall the co-production is a three-step process. The chemistry involves the steps of: (1) the reaction of 240fa with anhydrous HF in excess in a liquid-phase catalyzed reactor in such a way as to co-produce primarily 1233zd(E) and 244fa (plus byproduct HCl); (2) the 244fa stream can then be used to directly produce any of the three desired products; (3a) the 244fa stream can be dehydrochlorinated to produce the desired second product 1234ze(E); and/or (3b) the 244fa stream can be dehydrofluorinated to produce 1233zd(E) if more of that product is desired; and/or (3c) the 244fa stream can be further fluorinated to form 245fa.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: February 11, 2014
    Assignee: Honeywell International Inc.
    Inventors: Daniel C. Merkel, Haiyou Wang, Konstantin A. Pokrovski, Hsueh Sung Tung, Ian Shankland
  • Patent number: 8633340
    Abstract: The invention provides a process for preparing 1,1,1-trifluoro-2,3-dichloropropane (243db), which process comprises contacting 3,3,3-trifluoropropene (1243zf) with chlorine in the presence of a catalyst, wherein the catalyst comprises activated carbon, alumina and/or an oxide of a transition metal.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: January 21, 2014
    Assignee: Mexichem Amanco Holding S.A. de C.V.
    Inventors: John W. Smith, Claire McGuiness, Andrew P. Sharratt
  • Patent number: 8629307
    Abstract: The invention provides a process for the preparation of 2,3,3,3-tetrafluoropropene (1234yf) comprising (a) contacting 1,1,1-trifluoro-2,3-difluoropropane (243db) with hydrogen fluoride (HF) in the presence of a zinc/chromia catalyst to produce a compound having the formula CF3CHFCH2X, wherein X is Cl or F, and (b) dehydrohalogenating the compound of formula CF3CHFCH2X to produce 1234yf.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: January 14, 2014
    Assignee: Mexichem Amanco S.A. de C.V.
    Inventors: John W. Smith, Claire McGuiness, Andrew P. Sharratt
  • Patent number: 8614361
    Abstract: The present invention provides an effective, selective, and industrially applicable process for producing 2,3,3,3-tetrafluoropropene. Specifically, the present invention provides a process for producing 2,3,3,3-tetrafluoropropene including reacting 2-chloro-3,3,3-trifluoropropene with hydrogen fluoride in the presence of oxygen and a catalyst comprising chromium oxide represented by the composition formula: CrOm (1.5<m<3), or fluorinated chromium oxide obtained by fluorinating the chromium oxide.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: December 24, 2013
    Assignee: Daikin Industries, Ltd.
    Inventors: Atsushi Suzuki, Masatoshi Nose, Tsuneo Yamashita
  • Patent number: 8604257
    Abstract: Disclosed is a process for the preparation of fluorine-containing olefins comprising contacting a chlorofluoroalkane with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of the chlorine substituents of the chlorofluoroalkane with hydrogen to produce a fluorine-containing olefin. Also disclosed are catalyst compositions for the hydrodechlorination of chlorofluoroalkanes comprising copper metal deposited on a support, and comprising palladium deposited on calcium fluoride, poisoned with lead and reducing the in the presence or absence of a dehydrochlorination catalyst under conditions effective to form a product stream comprising cis-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336).
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: December 10, 2013
    Assignee: Honeywell International Inc.
    Inventors: Andrew Joseph Poss, Michael Van Der Puy, Rajiv Ratna Singh, David Nalewajek, Haridasan K. Nair
  • Patent number: 8575407
    Abstract: A support of metal oxyfluoride or metal halide for a metal-based hydrogenation catalyst useful in hydrogenating fluoroolefins is provided.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: November 5, 2013
    Assignee: Honeywell International Inc.
    Inventors: Haiyou Wang, Hsueh Sung Tung
  • Patent number: 8552228
    Abstract: The invention provides a process for the preparation of 2,3,3,3-tetrafluoropropene (1234yf) comprising (a) contacting 1,1,1-trifluoro-2,3-difluoropropane (243db) with hydrogen fluoride (HF) in the presence of a zinc/chromia catalyst to produce a compound having the formula CF3CHFCH2X, wherein X is Cl or F, and (b) dehydrohalogenating the compound of formula CF3CHFCH2X to produce 1234yf.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: October 8, 2013
    Assignee: Mexichem Amanco Holdings S.A. de C.V.
    Inventors: John W. Smith, Claire McGuiness, Andrew P. Sharratt
  • Patent number: 8530709
    Abstract: The present invention provides a method for the preparation of suitable chlorofluorocarbon and hydrochlorofluorocarbon materials or chlorofluorocarbon and hydrochlorofluorocarbon alkene and alkyne intermediates which serve as useful feedstock for fluorination and reduction to cis-1,1,1,4,4,4-hexafluoro-2-butene. Also presented is a continuous process for the production of cis-1,1,1,4,4,4-hexafluoro-2-butene from the alkene and alkyne intermediates.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: September 10, 2013
    Assignee: Honeywell International Inc.
    Inventors: Andrew Joseph Poss, David Nalewajek, Michael Van Der Puy, Haridasan K. Nair
  • Patent number: 8450537
    Abstract: A process is disclosed for making CF3CH2CHF2, CF3CH?CHF, and/or CF3CH?CHCl. This process involves reacting at least one starting material selected from the group consisting of halopropenes of the formula CX3CH?CH2 and halopropenes of the formula CX2?CHCH2X, wherein each X is independently F or Cl, with HF and Cl2 in a reaction zone to produce a product mixture comprising HF, HCl, CF3CH2CHF2, CF3CH?CHF and CF3CH?CHCl; and recovering the CF3CH2CHF2, CF3CH?CHF, and/or CF3CH?CHCl from the product mixture. The molar ratio of HF to the total amount of starting materials fed to the reaction zone is at least stoichiometric, and the molar ratio of Cl2 to total amount of starting material fed to the reaction zone is 2:1 or less.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: May 28, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Velliyur Nott Mallikarjuna Rao, Allen Capron Sievert
  • Patent number: 8445736
    Abstract: A one reactor, gas phase catalyzed process for the fluorination of 1,1,2,3-tetrachloropropene (1230xa) to produce 1,1,1,2-tetrafluoropropene (1234yf) is disclosed. The process of the present invention is a catalytic, gas phase fluorination using a high pressure activated catalyst which is supported or unsupported. Fluorination products of the formula CF3R, where R is selected from —CCl?CH2, —CF?CH2, —CF2—CH3, —CFCl—CH3 and mixtures thereof are produced. Co-produced materials are separated from the desired product and recycled to the same reactor.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: May 21, 2013
    Assignee: Arkema Inc.
    Inventors: Maher Y. Elsheikh, Philippe Bonnet
  • Patent number: 8436218
    Abstract: The present invention relates to an azeotropic or azeotrope-like mixture consisting essentially of 1,1,1,2,3,3-hexafluoropropane, hexafluoropropene and hydrogen fluoride.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: May 7, 2013
    Assignee: Honeywell International Inc.
    Inventors: Ryan Hulse, Hang T. Pham, Rajiv Ratna Singh, Hsueh Sung Tung, Daniel C. Merkel, Konstantin A. Pokrovski
  • Publication number: 20130102815
    Abstract: The invention provides a process for the preparation of 2,3,3,3-tetrafluoropropene (1234yf) comprising (a) contacting 1,1,1-trifluoro-2,3-difluoropropane (243db) with hydrogen fluoride (HF) in the presence of a zinc/chromia catalyst to produce a compound having the formula CF3CHFCH2X, wherein X is Cl or F, and (b) dehydrohalogenating the
    Type: Application
    Filed: December 12, 2012
    Publication date: April 25, 2013
    Applicant: Mexichem Amanco Holding S.A. de C.V.
    Inventor: Mexichem Amanco Holding S.A. de C.V.
  • Patent number: 8415515
    Abstract: A process for the production of dichlorotrifluoroethane is described. The process comprises reacting perchloroethylene with hydrogen fluoride (HF) at elevated temperature in the vapour phase in at least one reactor in the presence of a fluorination catalyst. The process is operated so that 30 weight % or more of the perchloroethylene reactant that is fed to the at least one reactor remains unreacted having passed through the or each reactor. The dichlorotrifluoroethane may be purified and then used as it is or used to prepare pentafluoroethane.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: April 9, 2013
    Assignee: Mexichem Amanco Holding S.A. de C.V.
    Inventors: Clive R Giddis, Paul H Stewert
  • Patent number: 8395001
    Abstract: To provide processes for efficiently and economically producing 2-chloro-1,1,1,2-tetrafluoropropane (R244bb) and 2,3,3,3-tetrafluoropropene (R1234yf) in an industrially practical manner. A process for producing 2-chloro-1,1,1,2-tetrafluoropropane, which comprises a chlorination step of reacting 1,2-dichloro-2-fluoropropane and chlorine in the presence of a solvent under irradiation with light to obtain 1,1,1,2-tetrachloro-2-fluoropropane, and a fluorination step of reacting the 1,1,1,2-tetrachloro-2-fluoropropane obtained in the chlorination step and hydrogen fluoride in the presence of a catalyst to obtain 2-chloro-1,1,1,2-tetrafluoropropane, and a process for producing 2,3,3,3-tetrafluoropropene, which comprises dehydrochlorinating it in the presence of a catalyst.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: March 12, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Satoshi Kawaguchi, Takashi Okazoe, Hidekazu Okamoto
  • Publication number: 20130060068
    Abstract: A process is disclosed for making CF3CH2CHF2, CF3CH?CHF, and/or CF3CH?CHCl. This process involves reacting at least one starting material selected from the group consisting of halopropenes of the formula CX3CH?CH2 and halopropenes of the formula CX2?CHCH2X, wherein each X is independently F or Cl, with HF and Cl2 in a reaction zone to produce a product mixture comprising HF, HCl, CF3CH2CHF2, CF3CH?CHF and CF3CH?CHCl; and recovering the CF3CH2CHF2, CF3CH?CHF, and/or CF3CH?CHCl from the product mixture. The molar ratio of HF to the total amount of starting materials fed to the reaction zone is at least stoichiometric, and the molar ratio of Cl2 to total amount of starting material fed to the reaction zone is 2:1 or less.
    Type: Application
    Filed: October 23, 2012
    Publication date: March 7, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventor: E I DU PONT DE NEMOURS AND COMPANY
  • Patent number: 8344191
    Abstract: The present invention provides a process for producing 2,3,3,3-tetrafluoropropene represented by the formula CF3CF?CH2, comprising contacting a fluorine-containing propane represented by the formula CF2XCFYCH2Z, wherein X is Cl, Br, or I; one of Y and Z is H, and the other is F, Cl, Br, or I, with at least one catalyst selected from the group consisting of chromium oxides, fluorinated chromium oxides, and iron fluorides in a gas phase. According to the process of the invention, 2,3,3,3-tetrafluoropropene can be easily produced under economically advantageous conditions.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: January 1, 2013
    Assignee: Daikin Industries, Ltd.
    Inventors: Masatoshi Nose, Daisuke Karube, Akinari Sugiyama, Takashi Shibanuma, Takehiro Chaki
  • Patent number: 8318992
    Abstract: A process is disclosed for making CF3CF2CH3, CF3CF?CH2 and/or CF3CCl?CH2. The process involves reacting at least one starting material selected from the group consisting of halopropanes of the formula CX3CH2CH2X, halopropenes of the formula CX3CH?CH2 and halopropenes of the formula CX2?CHCH2X, wherein each X is independently F or Cl, with HF and Cl2 in a reaction zone to produce a product mixture comprising HF, HCl, CF3CF2CH3, CF3CF?CH2, and CF3CCl?CH2; and recovering the CF3CF2CH3, CF3CF?CH2 and/or CF3CCl?CH2 from the product mixture. Also disclosed is a process for making CF3CH2CHF2, CF3CH?CHF, and/or CF3CH?CHCl.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: November 27, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Velliyur Nott Mallikarjuna Rao, Allen Capron Sievert
  • Patent number: 8309774
    Abstract: The invention is directed to a process for preparing 2,2,2,3-tetrafluoropropene (1234yf), comprising: (i) contacting 1,1,2,3-tetrachloropropene (1230xa) with hydrogen fluoride HF in gas phase in the presence of a fluorination catalyst under conditions sufficient to produce a reaction mixture; (ii) separating the reaction mixture into a first stream comprising HCl, 2,2,2,3-tetrafluoropropene (1234yf) and a second stream comprising HF, 2-chloro-3,3,3-trifluoro-1-propene (1233xf) and 1,1,1,2,2-pentafluoropropane (245cb); (iii) recycling at least a part of the second stream at least in part back to step (i).
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: November 13, 2012
    Assignee: Arkema France
    Inventors: Anne Pigamo, Dominique Deur-Bert, Laurent Wendlinger
  • Patent number: 8207383
    Abstract: The present invention provides a process for preparing 1234yf, comprising: (i) contacting 1233xf with hydrogen fluoride HF in gas phase in the presence of a fluorination catalyst under conditions sufficient to produce a reaction mixture; (ii) separating the reaction mixture into a first stream comprising HCl, 1234yf and a second stream comprising HF, unreacted 1233xf and 245cb; (iii) recycling at least a part of the second stream at least in part back to step (i).
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: June 26, 2012
    Assignee: Arkema France
    Inventors: Dominique Deur-Bert, Laurent Wendlinger, Anne Pigamo
  • Patent number: 8207384
    Abstract: The invention provides a process for preparing 1234yf, comprising: (i) contacting 243db with hydrogen fluoride HF in gas phase in the presence of a fluorination catalyst under conditions sufficient to produce a reaction mixture; (ii) separating the reaction mixture into a first stream comprising HCl, 1234yf and a second stream comprising HF, 1233xf and 245cb; (iii) recycling at least a part of the second stream at least in part back to step (i).
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: June 26, 2012
    Assignee: Arkema France
    Inventors: Laurent Wendlinger, Anne Pigamo, Dominique Deur-Bert
  • Patent number: 8158836
    Abstract: The invention is directed to a process for preparing 2,3,3,3-tetrafluoropropene (1234yf), comprising: (i) contacting 1,1,2,3-tetrachloropropene (1230xa) with hydrogen fluoride HF in gas phase in the presence of a fluorination catalyst under conditions sufficient to produce a reaction mixture; (ii) separating the reaction mixture into a first stream comprising HCl, 2,3,3,3-tetrafluoropropene (1234yf) and a second stream comprising HF, 2-chloro-3,3,3-trifluoro-1-propene (1233xf) and 1,1,1,2,2-pentafluoropropane (245cb); (iii) recycling at least a part of the second stream at least in part back to step (i).
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: April 17, 2012
    Assignee: Arkema France
    Inventors: Anne Pigamo, Dominique Deur-Bert, Laurent Wendlinger
  • Patent number: 8110713
    Abstract: The present invention relates to a process for producing pentafluoroethane. More particularly, the subject of the invention is a continuous process for producing pentafluoroethane comprising (i) a step of fluorinating perchloroethylene (PER) with hydrofluoric acid, in the gas phase, in the presence of a catalyst, (ii) a step of separating the products issuing from step (i) in order to give a fraction of light products and a fraction of heavy products, comprising hydrofluoric acid, unreacted perchloroethylene and under-fluorinated products, and (iii) a step of pretreating the fraction of heavy products before recycling to step (i).
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: February 7, 2012
    Assignee: Arkema France
    Inventors: Béatrice Boussand, Sylvain Perdrieux
  • Publication number: 20120016165
    Abstract: A process for the production of dichlorotrifluoroethane is described. The process comprises reacting perchloroethylene with hydrogen fluoride in the vapour phase at elevated temperature in at least one reactor in the presence of a fluorination catalyst to produce a composition comprising dichlorotrifluoroethane, hydrogen chloride, unreacted perchloroethylene and unreacted hydrogen fluoride. The composition that is produced is subjected to a separation step to recover a first fraction comprising dichlorotrifluoroethane and a second fraction comprising perchloroethylene and hydrogen fluoride. The second fraction is further separated into a hydrogen fluoride-rich fraction and a perchloroethylene-containing, organic-rich fraction which are then recycled. The dichlorotrifluoroethane that is recovered may be used to prepare pentafluoroethane.
    Type: Application
    Filed: September 23, 2011
    Publication date: January 19, 2012
    Applicant: Mexichem Amanco S.A. de C.V.
    Inventors: CLIVE ROBERT GIDDIS, PAUL HENDRY STEWERT
  • Publication number: 20120016166
    Abstract: A process for the production of dichlorotrifluoroethane is described. The process comprises reacting perchloroethylene with hydrogen fluoride (HF) at elevated temperature in the vapour phase in at least one reactor in the presence of a fluorination catalyst. The process is operated so that 30 weight % or more of the perchloroethylene reactant that is fed to the at least one reactor remains unreacted having passed through the or each reactor. The dichlorotrifluoroethane may be purified and then used as it is or used to prepare pentafluoroethane.
    Type: Application
    Filed: September 23, 2011
    Publication date: January 19, 2012
    Applicant: Mexichem Amanco S.A. de C.V.
    Inventors: Clive Robert GIDDIS, Paul Hendry Stewert
  • Patent number: 8058487
    Abstract: The present invention relates to a continuous process for the fluorination of perchloroethylene (PER) in the gas phase in a single stage with hydrofluoric acid (HF) in the presence of a catalyst to give, as major product, pentafluoroethane. The process is characterized in that it is carried out at a temperature of between 280 and 430° C. and with an HF/PER molar ratio of greater than or equal to 20.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: November 15, 2011
    Assignee: Arkema France
    Inventors: Beatrice Boussand, Michel Devic
  • Patent number: 8058485
    Abstract: A process for the production of dichlorotrifluoroethane is described. The process comprises reacting perchloroethylene with hydrogen fluoride in the vapor phase at elevated temperature in at least one reactor in the presence of a fluorination catalyst to produce a composition comprising dichlorotrifluoroethane, hydrogen chloride, unreacted perchloroethylene and unreacted hydrogen fluoride. The composition that is produced is subjected to a separation step to recover a first fraction comprising dichlorotrifluoroethane and a second fraction comprising perchloroethylene and hydrogen fluoride. The second fraction is further separated into a hydrogen fluoride-rich fraction and a perchloroethylene-containing, organic-rich fraction which are then recycled. The dichlorotrifluoroethane that is recovered may be used to prepare pentafluoroethane.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: November 15, 2011
    Assignee: Mexichem Amanco S.A. de C.V.
    Inventors: Clive Robert Giddis, Paul Hendry Stewert
  • Patent number: 8053611
    Abstract: A process is disclosed for the manufacture of 1,1,1,3,3,3-hexafluoropropane and 1,1,1,2,3,3-hexafluoropropane, hexafluoropropene and/or 1,1,1,2,3,3,3-heptafluoropropane. The process involves (a) reacting HF, Cl2, and at least one halopropene of the formula CX3CCl?CClX (where each X is independently F or Cl) to produce a product comprising CF3CCl2CF3 and CF3CClFCClF2; (b) reacting CF3CCl2CF3 and CF3CClFCClF2 produced in (a) with hydrogen, optionally in the presence of HF, to produce a product comprising CF3CH2CF3 and at least one of CHF2CHFCF3, CF3CF?CF2 and CF3CFHCF3; and (c) recovering from the product produced in (b), CF3CH2CF3 and at least one of CHF2CHFCF3, CF3CF?CF2 and CF3CFHCF3. In (a), the CF3CCl2CF3 and CF3CClFCClF2 are produced in the presence of a chlorofluorination catalyst including (i) a crystalline alpha-chromium oxide where at least 0.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: November 8, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Velliyur Nott Mallikarjuna Rao, H. David Rosenfeld, Allen Capron Sievert, Shekhar Subramoney
  • Patent number: 8049045
    Abstract: A process for the production of dichlorotrifluoroethane is described. The process comprises reacting perchloroethylene with hydrogen fluoride (HP) at elevated temperature in the vapor phase in at least one reactor in the presence of a fluorination catalyst. The process is operated so that 30 weight % or more of the perchloroethylene reactant that is fed to the at least one reactor remains unreacted having passed through the or each reactor. The dichlorotrifluoroethane may be purified and then used as it is or used to prepare pentafluoroethane.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: November 1, 2011
    Assignee: Mexichem Amanco S.A. de C.V.
    Inventors: Clive Robert Giddis, Paul Hendry Stewert
  • Publication number: 20110237846
    Abstract: To provide processes for efficiently and economically producing 2-chloro-1,1,1,2-tetrafluoropropane (R244bb) and 2,3,3,3-tetrafluoropropene (R1234yf) in an industrially practical manner. A process for producing 2-chloro-1,1,1,2-tetrafluoropropane, which comprises a chlorination step of reacting 1,2-dichloro-2-fluoropropane and chlorine in the presence of a solvent under irradiation with light to obtain 1,1,1,2-tetrachloro-2-fluoropropane, and a fluorination step of reacting the 1,1,1,2-tetrachloro-2-fluoropropane obtained in the chlorination step and hydrogen fluoride in the presence of a catalyst to obtain 2-chloro-1,1,1,2-tetrafluoropropane, and a process for producing 2,3,3,3-tetrafluoropropene, which comprises dehydrochlorinating it in the presence of a catalyst.
    Type: Application
    Filed: June 10, 2011
    Publication date: September 29, 2011
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Satoshi KAWAGUCHI, Takashi OKAZOE, Hidekazu OKAMOTO
  • Publication number: 20110224466
    Abstract: A new chromium-containing fluorination catalyst is described. The catalyst comprises an amount of zinc that promotes activity and from 0.1 to 8.0% by weight of the chromium in the catalyst based on the total weight of the chromium is present as chromium (VI). The use of the zinc-promoted, chromium-containing catalyst in a fluorination process in which a hydrocarbon or halogenated hydrocarbon is reacted with hydrogen fluoride in the vapour-phase at elevated temperatures is also described.
    Type: Application
    Filed: September 4, 2009
    Publication date: September 15, 2011
    Inventor: Andrew P. Sharratt
  • Patent number: 7947856
    Abstract: A telomerisation process is described whereby haloalkanes like tetrachloromethane are added to halogenated olefins like 2-chloroprop-1-ene in the presence of an iron catalyst and a phosphite. The reaction products, e.g. 1,1,1,3,3-pentachlorobutane, can be fluorinated.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: May 24, 2011
    Assignee: SOLVAY (Societe Anonyme)
    Inventors: Veronique Mathieu, Francine Janssens
  • Publication number: 20110118514
    Abstract: A process is disclosed for the manufacture of 1,1,1,3,3,3-hexafluoropropane and 1,1,1,2,3,3-hexafluoropropane, hexafluoropropene and/or 1,1,1,2,3,3,3-heptafluoropropane. The process involves (a) reacting HF, Cl2, and at least one halopropene of the formula CX3CCI?CCIX (where each X is independently F or CI) to produce a product comprising CF3CCI2CF3 and CF3CCIFCCIF2; (b) reacting CF3CCI2CF3 and CF3CCIFCCIF2 produced in (a) with hydrogen, optionally in the presence of HF, to produce a product comprising CF3CH2CF3 and at least one of CHF2CHFCF3, CF3CF?CF2 and CF3CFHCF3; and (c) recovering from the product produced in (b), CF3CH2CF3 and at least one of CHF2CHFCF3, CF3CF?CF2 and CF3CFHCF3. In (a), the CF3CCI2CF3 and CF3CCIFCCIF2 are produced in the presence of a chlorofluorination catalyst including (i) a crystalline alpha-chromium oxide where at least 0.
    Type: Application
    Filed: August 4, 2006
    Publication date: May 19, 2011
    Inventors: Velliyur Nott Mallikarjuna Rao, H. David Rosenfeld, Allen Capron Sievert, Shekhar Subramoney
  • Publication number: 20110112340
    Abstract: The invention provides a process for the preparation of 2,3,3,3-tetrafluoropropene (1234yf) comprising (a) contacting 1,1,1-trifluoro-2,3-difluoropropane (243db) with hydrogen fluoride (HF) in the presence of a zinc/chromia catalyst to produce a compound having the formula CF3CHFCH2X, wherein X is Cl or F, and (b) dehydrohalogenating the compound of formula CF3CHFCH2X to produce 1234yf.
    Type: Application
    Filed: April 9, 2009
    Publication date: May 12, 2011
    Inventors: John W. Smith, Claire Mcguiness, Andrew P. Sharratt
  • Publication number: 20110060171
    Abstract: The present invention relates to a process for the manufacture of pentafluoroethane. It more particularly relates to a process for the manufacture of pentafluoroethane by gas-phase fluorination of perchloroethylene (PER) in the presence of a catalyst, characterized in that (i) the reaction of the PER with HF is carried out with an HF/PER molar ratio of greater than or equal to 20 and a pressure of greater than 5 bar absolute, and that (ii) the stream leaving this reaction step is recycled directly to the reaction step after separation of pentafluoroethane and of HCl.
    Type: Application
    Filed: October 10, 2007
    Publication date: March 10, 2011
    Applicant: Arkema France
    Inventors: Béatrice Boussand, Emmanuel Guiraud
  • Publication number: 20100331583
    Abstract: The invention provides an improved process to manufacture 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb) by reacting 2-chloro-3,3,3,-trifluoropropene (HCFO-1233xf) with hydrogen fluoride, in the presence of a fluorination catalyst, where by using 2-chloro-3,3,3,-trifluoropropene (HCFO-1233xf) of high purity, the need to add an oxidizing agent (typically chlorine) to keep the catalyst active can be avoided. The HCFC-244bb is then used as an intermediate in the production of 2,3,3,3-tetrafluoropropene-1 (HFO-1234yf).
    Type: Application
    Filed: June 28, 2010
    Publication date: December 30, 2010
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Robert C. Johnson, Daniel C. Merkel
  • Publication number: 20100286456
    Abstract: The process for recovering pentafluoroethane of the invention includes bringing a mixed gas containing pentafluoroethane and a non-condensable gas into contact with a chlorinated solvent, and allowing the chlorinated solvent to absorb pentafluoroethane contained in the mixed gas. The process for the production of pentafluoroethane of the invention uses the recovering process.
    Type: Application
    Filed: July 27, 2006
    Publication date: November 11, 2010
    Applicant: SHOWA DENKO K.K.
    Inventor: Kazunari KAGA