Patents by Inventor Maher Y. Elsheikh

Maher Y. Elsheikh 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).

  • Publication number: 20100105789
    Abstract: The present invention relates to blowing agent compositions comprising (1) at least one hydrofluoroolefin (HFO) and (2) at least one hydrochlorofluoroolefin (HCFO) used in the preparation of foamable thermoplastic compositions. The HFOs of component (1) include, but are not limited too, 3,3,3-trifluoropropene (HFO-1243zf), 1,2,3,3,3-pentafluoropropene (HFO-1225ye), cis- and/or trans-1,3,3,3-tetrafluoropropene (HFO-1234ze), and 2,3,3,3-tetrafluoropropene (HFO 1234yf), and mixtures thereof. The HCFOs of component (2) include, but are not limited to, 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd), 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf) and mixtures thereof. The blowing agent compositions are useful in the production of low density insulating foams with improved k-factor.
    Type: Application
    Filed: March 28, 2008
    Publication date: April 29, 2010
    Applicant: Arkema Inc.
    Inventors: Brett L. Van Horn, Maher Y. Elsheikh, Benjamin Bin Chen, Philippe Bonnet
  • Publication number: 20100087557
    Abstract: A blowing agent for thermosetting foams is disclosed. The blowing agent is the hydrofluoropropene HFO-1243zf in combination with a hydrochlorofluoroolefin (HCFO) selected from HCFO-1233zd, HCFO-1233xf and HCFO-1223. The blowing agent is effective as a blowing agent in the manufacture of thermosetting foams.
    Type: Application
    Filed: March 28, 2008
    Publication date: April 8, 2010
    Applicant: Arkema Inc
    Inventors: Benjamin Bin Chen, Joseph S. Costa, Brett L. Van Horn, Maher Y. Elsheikh, Philippe Bonnet
  • Publication number: 20100056657
    Abstract: A blowing agent for thermosetting foams is disclosed. The blowing agent is a hydrofluoroolefin (HCFO), preferably HFCO-1234ze in combination with a hydrochlorofluoroolefin (HCFO) preferably one selected from HCFO-1233zd, HCFO-1223, HCFO-1233xf and mixtures thereof. The blowing agent is effective as a blowing agent in the manufacture of thermosetting foams.
    Type: Application
    Filed: March 28, 2008
    Publication date: March 4, 2010
    Applicant: ARKEMA INC.
    Inventors: Benjamin Bin Chen, Joseph S. Costa, Philippe Bonnet, Maher Y. Elsheikh, Brett L. Van Horn
  • Patent number: 7485598
    Abstract: A process for the activation of a fluorination catalyst in which a catalyst precursor compound, supported or unsupported is first dried and thereafter activated by exposure to an activating agent at a pressure greater that about 100 psig and a temperature grater than about 100° C. The process is particularly suited to the activation of chromium (III) compounds, such as Cr2O3. The resulted dry, high-pressure activated catalyst was found to provide increase fluorination conversion, with higher selectivity of the desired product.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: February 3, 2009
    Assignee: Arkema Inc.
    Inventors: Maher Y. Elsheikh, Beatrice Boussand
  • Patent number: 7442321
    Abstract: Provided are azeotrope-like compositions comprising 1,1,1-trifluoro-3-chloropropene (HCFO-1233zd) and trans-1,2-dichloroethylene (TDCE) and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, solvent, and aerosol propellants.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: October 28, 2008
    Assignee: Arkema Inc.
    Inventors: Benjamin Bin Chen, Philippe Bonnet, Brett Van Horn, Maher Y. Elsheikh
  • Publication number: 20070299286
    Abstract: A process for the activation of a fluorination catalyst in which a catalyst precursor compound, supported or unsupported is first dried and thereafter activated by exposure to an activating agent at a pressure greater that about 100 psig and a temperature grater than about 100° C. The process is particularly suited to the activation of chromium (III) compounds, such as Cr2O3. The resulted dry, high-pressure activated catalyst was found to provide increase fluorination conversion, with higher selectivity of the desired product.
    Type: Application
    Filed: June 21, 2006
    Publication date: December 27, 2007
    Inventor: Maher Y. Elsheikh
  • Patent number: 6528691
    Abstract: A gas phase process for the preparation of 245fa is provided, wherein 1233zd is contacted with HF in the presence of a supported antimony catalyst.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: March 4, 2003
    Assignee: Atofina Chemicals, Inc.
    Inventors: Maher Y. Elsheikh, Bin Chen
  • Publication number: 20020183569
    Abstract: A process for the preparation of 142 is provided, wherein 140 is fluorinated in the gas phase with HF in the presence of a fluorination catalyst. 142 is a known foam blowing agent.
    Type: Application
    Filed: July 26, 2002
    Publication date: December 5, 2002
    Inventors: Michael S. Bolmer, Bin Chen, Maher Y. Elsheikh
  • Patent number: 6479718
    Abstract: An improved liquid phase process is provided for the fluorination of perchloroethylene to 1,1-dichloro-2,2,2-trifluoroethane in the presence of an antimony catalyst.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: November 12, 2002
    Assignee: Atofina Chemicals, Inc.
    Inventors: Maher Y. Elsheikh, Jonathan M. Tracy, John A. Wismer
  • Patent number: 6235161
    Abstract: Inhibition of the formation of unsaturated carbon compounds during the heating of 141b involving the addition of various inhibitors such as butylene oxide and/or the use of a vessel made of a nickel alloy.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: May 22, 2001
    Assignee: Atofina Chemicals, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh, Anthony D. Kelton, Morris P. Walker, Danny W. Wright
  • Patent number: 6211421
    Abstract: An uncatalyzed liquid phase process is provided for producing 1,1,1-trifluoropropene via the fluorination of 1,1,3-trichloro-1-propene.
    Type: Grant
    Filed: September 26, 2000
    Date of Patent: April 3, 2001
    Assignee: Atofina Chemicals, Inc.
    Inventors: Maher Y. Elsheikh, Bin Chen
  • Patent number: 6166274
    Abstract: A liquid phase process is provided for the preparation of 1233zd with reduced oligomer formation via the fluorination of 1230za with HF in the presence of a catalyst selected from TFA and triflic acid. The 1233zd is a known intermediate useful for preparing 245fa.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: December 26, 2000
    Assignee: ATOFINA Chemicals, Inc.
    Inventors: Bin Chen, Michael S. Bolmer, Maher Y. Elsheikh
  • Patent number: 6159346
    Abstract: Inhibition of the formation of unsaturated carbon compounds during the heating of 141b involving the addition of various inhibitors such as dialkylhydroxylamine and/or the use of a vessel made of a nickel alloy.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: December 12, 2000
    Assignee: Elf Atochem North America, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh, Anthony D. Kelton, Morris P. Walker, Danny W. Wright
  • Patent number: 6124510
    Abstract: Preparation of cis/trans 1234ze monomer is provided, by dehydrofluorination of 245fa using an alkaline solution or using a gas phase catalyzed process.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: September 26, 2000
    Assignee: Elf Atochem North America, Inc.
    Inventors: Maher Y. Elsheikh, Paul D. Fellenger
  • Patent number: 6074985
    Abstract: A supported Lewis acid catalyst such as antimony V on a fluorine-treated moisture-free activated carbon support is provided, as are fluorination processes using such a catalyst.
    Type: Grant
    Filed: August 3, 1999
    Date of Patent: June 13, 2000
    Assignee: Elf Atochem North America, Inc.
    Inventors: Maher Y. Elsheikh, Bin Chen
  • Patent number: 6059933
    Abstract: Inhibition of the formation of unsaturated carbon compounds during the heating of 141b involving the addition of various inhibitors such as butylene oxide and/or the use of a vessel made of a nickel alloy.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: May 9, 2000
    Assignee: ELF Atochem North America, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh, Anthony D. Kelton, Morris P. Walker, Danny W. Wright
  • Patent number: 5895825
    Abstract: A process for the preparation of 245fa is provided, wherein 1233zd is first fluorinated to 1234ze, followed by fluorination of 1234ze to 245fa. 245fa is a known foam blowing agent and refrigerant.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: April 20, 1999
    Assignee: Elf Atochem North America, Inc.
    Inventors: Maher Y. Elsheikh, Michael S. Bolmer, Bin Chen
  • Patent number: 5877359
    Abstract: An uncatalyzed liquid phase process is provided for the preparation of oligomer free 1233zd via the fluorination of 1230za with a high molar excess of HF. The 1233zd is a known intermediate useful for preparing 245fa.
    Type: Grant
    Filed: January 27, 1998
    Date of Patent: March 2, 1999
    Assignee: Elf Atochem North America, Inc.
    Inventor: Maher Y. Elsheikh
  • Patent number: 5811603
    Abstract: A process for the fluorination of 1230za is provided, wherein 1230za is contacted with HF in the gas phase in the presence of an aluminum fluoride or chromium-based fluorination catalyst under conditions sufficient to produce a reaction mixture containing 1233zd, 1234ze and 245fa. 245fa is a known foam blowing agent and refrigerant, while 1233zd and 1234ze are known intermediates useful for preparing 245fa.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: September 22, 1998
    Assignee: Elf Atochem North America, Inc.
    Inventor: Maher Y. Elsheikh
  • Patent number: 5600038
    Abstract: Process for adiabatically hydrofluorinating hydrochlorocarbons and hydrochlorofluorocarbons in the gaseous phase in the presence of a catalyst that is active at the initial reaction temperature and remains highly selective at the maximum reaction temperature, e.g., a Cr catalyst. The molar ratio of HF to starting compound is at least about 2.5:1. The initial reaction temperature is selected such that the HF in the feed is partially associated but not completely (HF).sub.6. The catalyst may be unsupported or supported.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: February 4, 1997
    Assignee: Elf Atochem North America, Inc.
    Inventors: John A. Wismer, Maher Y. Elsheikh, Michael S. Bolmer, Jean P. Schirmann