Patents by Inventor Stephen Andrew Flaherty

Stephen Andrew Flaherty has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11572327
    Abstract: The present invention provides a process for preparing 1,1,1,2,2-pentafluoropropane (245cb), the process comprising gas phase catalytic dehydrochlorination of a composition comprising 1,1,1-trifluoro-2,3-dichloropropane (243db) to produce an intermediate composition comprising 3,3,3-trifluoro-2-chloro-prop-1-ene (CF3CCI?CH2, 1233xf), hydrogen chloride (HCl) and, optionally, air; and gas phase catalytic fluorination with hydrogen fluoride (HF) of the intermediate composition to produce a reactor product composition comprising 245cb, HF, HCl and air; wherein the process is carried out with a co-feed of air.
    Type: Grant
    Filed: October 8, 2021
    Date of Patent: February 7, 2023
    Assignee: Mexichem Fluor S.A. de C.V.
    Inventors: Sheryl Louise Johnson, Stephen Andrew Flaherty, Clive Robert Giddis
  • Publication number: 20220098131
    Abstract: The present invention provides a process for preparing 1,1,1,2,2-pentafluoropropane (245cb), the process comprising gas phase catalytic dehydrochlorination of a composition comprising 1,1,1-trifluoro-2,3-dichloropropane (243db) to produce an intermediate composition comprising 3,3,3-trifluoro-2-chloro-prop-1-ene (CF3CCI?CH2, 1233xf), hydrogen chloride (HCl) and, optionally, air; and gas phase catalytic fluorination with hydrogen fluoride (HF) of the intermediate composition to produce a reactor product composition comprising 245cb, HF, HCl and air; wherein the process is carried out with a co-feed of air.
    Type: Application
    Filed: October 8, 2021
    Publication date: March 31, 2022
    Applicant: Mexichem Fluor S.A. de C.V.
    Inventors: Sheryl Louise Johnson, Stephen Andrew Flaherty, Clive Robert Giddis
  • Patent number: 11155506
    Abstract: The present invention provides a process for preparing 1,1,1,2,2-pentafluoropropane (245cb), the process comprising gas phase catalytic dehydrochlorination of a composition comprising 1,1,1-trifluoro-2,3-dichloropropane (243db) to produce an intermediate composition comprising 3,3,3-trifluoro-2-chloro-prop-1-ene (CF3CCl?CH2, 1233xf), hydrogen chloride (HCl) and, optionally, air; and gas phase catalytic fluorination with hydrogen fluoride (HF) of the intermediate composition to produce a reactor product composition comprising 245cb, HF, HCl and air; wherein the process is carried out with a co-feed of air.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: October 26, 2021
    Assignee: Mexichem Fluor S.A. de C.V.
    Inventors: Sheryl Louise Johnson, Stephen Andrew Flaherty, Clive Robert Giddis
  • Patent number: 10899686
    Abstract: The present invention provides an integrated process for preparing 2,3,3, 3-tetrafluoropropene (1234yf), the process comprising: (a) vapour phase catalytic fluorination of a first composition comprising 3,3,3-trifluoro-2-chloro-prop-1-ene (CF3C—CNCH2, 1233xf) with hydrogen fluoride (HF) in a fluorination reactor to produce a fluorination product stream comprising 1,1,2,2-pentafluoropropane (245cb), HF and HCI; (b) vapour phase catalytic dehydrofluorination composition comprising 245cb in a dehydrofluorination reactor to produce a dehydrofluorination product stream comprising 1234yf and HF; wherein the fluorination product stream and the dehydrofluorination product stream are combined and subjected to (c) purification to produce a composition comprising 245cb and a 1234yf product stream.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: January 26, 2021
    Assignee: MEXICHEM FLUOR S.A. DE C.V.
    Inventors: Sheryl Louise Johnson, Stephen Andrew Flaherty, James Henry Murray, Fiona Louise Smith, Jonathan Junhay Man, Clive Robert Giddis
  • Publication number: 20200247734
    Abstract: The present invention provides a process for preparing 1,1,1,2,2-pentafluoropropane (245cb), the process comprising gas phase catalytic dehydrochlorination of a composition comprising 1,1,1-trifluoro-2,3-dichloropropane (243db) to produce an intermediate composition comprising 3,3,3-trifluoro-2-chloro-prop-1-ene (CF3CCI?CH2, 1233xf), hydrogen chloride (HCl) and, optionally, air; and gas phase catalytic fluorination with hydrogen fluoride (HF) of the intermediate composition to produce a reactor product composition comprising 245c, HF, HCl and air; wherein the process is carried out with a co-feed of air.
    Type: Application
    Filed: April 22, 2020
    Publication date: August 6, 2020
    Applicant: MEXICHEM FLUOR S.A. DE C.V.
    Inventors: SHERYL LOUISE JOHNSON, STEPHEN ANDREW FLAHERTY, CLIVE ROBERT GIDDIS
  • Patent number: 10669219
    Abstract: The present invention provides a process for preparing 1,1,1,2,2-pentafluoropropane (245cb), the process comprising gas phase catalytic dehydrochlorination of a composition comprising 1,1,1-trifluoro-2,3-dichloropropane (243db) to produce an intermediate composition comprising 3,3,3-trifluoro-2-chloro-prop-1-ene (CF3CCI?CH2, 1233xf), hydrogen chloride (HCI) and, optionally, air; and gas phase catalytic fluorination with hydrogen fluoride (HF) of the intermediate composition to produce a reactor product composition comprising 245cb, HF, HCI and air; wherein the process is carried out with a co-feed of air.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: June 2, 2020
    Assignee: MEXICHEM FLUOR S.A. DE C.V.
    Inventors: Sheryl Louise Johnson, Stephen Andrew Flaherty, Clive Robert Giddis
  • Publication number: 20190330130
    Abstract: The present invention provides a process for preparing 1,1,1,2,2-pentafluoropropane (245cb), the process comprising gas phase catalytic dehydrochlorination of a composition comprising 1,1,1-trifluoro-2,3-dichloropropane (243db) to produce an intermediate composition comprising 3,3,3-trifluoro-2-chloro-prop-1-ene (CF3CCI=CH2, 1233xf), hydrogen chloride (HCI) and, optionally, air; and gas phase catalytic fluorination with hydrogen fluoride (HF) of the intermediate composition to produce a reactor product composition comprising 245cb, HF, HCI and air; wherein the process is carried out with a co-feed of air.
    Type: Application
    Filed: July 14, 2016
    Publication date: October 31, 2019
    Applicants: MEXICHEM FLUOR S.A. DE C.V., MEXICHEM UK LIMITED
    Inventors: SHERYL LOUISSE JOHNSON, STEPHEN ANDREW FLAHERTY, CLIVE ROBERT GIDDIS
  • Patent number: 7186869
    Abstract: A process for removing one or more unsaturated halocarbons from a halocarbon mixture comprising one or more unsaturated halocarbons and one or more saturated halocarbons, which process comprises contacting the halocarbon mixture with a mixture of a solid chemical oxidant and a solid support in the presence of water.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: March 6, 2007
    Assignee: Ineos Fluor Holdings Limited
    Inventors: Stephen Andrew Flaherty, Paul Hendry Stewart
  • Publication number: 20040133051
    Abstract: A process for removing one or more unsaturated halocarbons from a halocarbon mixture comprising one or more unsaturated halocarbons and one or more saturated halocarbons, which process comprises contacting the halocarbon mixture with a mixture of a solid chemical oxidant and a solid support in the presence of water.
    Type: Application
    Filed: February 5, 2004
    Publication date: July 8, 2004
    Inventors: Stephen Andrew Flaherty, Paul Hendry Stewart