Patents by Inventor Mordechai Pasternak

Mordechai Pasternak 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).

  • Polymer treating process
    Patent number: 5391438
    Abstract: The surface of a polymer such as polypropylene, may be treated by contact with an amine donor such as ethylene diamine followed by irradiation with ultraviolet light of wave length of about 1800.ANG.-2800.ANG. to improve surface wettability.
    Type: Grant
    Filed: October 1, 1993
    Date of Patent: February 21, 1995
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Photooxidation of hydrocarbons
    Patent number: 5326440
    Abstract: Photooxidation of cyclohexene or tetralin is effected preferably in the presence of a photosensitizer such as an aliphatic ketone by light of wave length of about 2000 .ANG.-7000 .ANG. to form hydroperoxide, alcohol, and ketone products in good photoconversion yield and selectivity.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: July 5, 1994
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Abraham Morduchowitz
  • Membrane process for separating a mixture containing dewaxed oil and dewaxing solvent
    Patent number: 5240591
    Abstract: A charge containing dewaxed oil/dewaxing solvent may be treated to effect separation of components by a thermally cross-linked hydrocarbon-derived elastomer membrane, typified by polybutadiene.
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: August 31, 1993
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Membrane process for separating a mixture containing dewaxed oil and dewaxing solvent
    Patent number: 5238567
    Abstract: A charge containing dewaxed oil/dewaxing solvent may be treated to effect separation of components by a thermally cross-linked hydrocarbon-derived elastomer membrane, typified by polybutadiene.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: August 24, 1993
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Separation of organic liquids
    Patent number: 5238573
    Abstract: Mixtures containing methanol and dimethyl carbonate or methanol and methyl t-butyl ether may be treated by pervaporation to recover product containing decreased quantity of methanol.
    Type: Grant
    Filed: April 9, 1992
    Date of Patent: August 24, 1993
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Membrane process for treating a charge containing dewaxing solvent and dewaxed oil
    Patent number: 5234579
    Abstract: Dewaxed oil containing dewaxing solvent from solvent dewaxing is treated by contact with a separating elastomer membrane to yield a retentate containing increased content of dewaxed oil and decreased content of dewaxing solvent and a permeate which contains increased content of dewaxing solvent and decreased content of dewaxed oil--the membrane including a barrier layer of an adduct of maleic acid anhydride and a poly(aliphatic terpene) which has been thermally cross-linked.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: August 10, 1993
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Dewatering of concentrated aqueous solutions by pervaporation
    Patent number: 5182022
    Abstract: Charge aqueous solution containing 85 w % ethylene glycol is concentrated by pervaporation across a sulfonated polyethylene membrane to yield retentate containing 95 w % ethylene glycol.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: January 26, 1993
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, John Reale, Jr.
  • Membrane and method of separation
    Patent number: 5171449
    Abstract: Charge compositions containing aqueous mixtures of organic nitrogen compounds may be separated by pervaporation through a membrane assembly containing a porous ceramic support bearing as separating layer, polyvinyl alcohol which has been cross-linked as with glutaraldehyde.
    Type: Grant
    Filed: January 6, 1992
    Date of Patent: December 15, 1992
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Uygur Kokturk
  • Membrane separation process
    Patent number: 5160046
    Abstract: Aqueous solutions of organic oxygenates, typified by concentrated aqueous solutions of ethanol or isopropanol, are dewatered by pervaporation through a polyimine membrane which has been interfacially cross-linked with a polyisocyanate or a poly(carbonyl chloride).
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: November 3, 1992
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Process for treating a mixture containing dewaxed oil and dewaxing solvent
    Patent number: 5146038
    Abstract: Charge containing dewaxed oil and dewaxing solvent (typically methyl ethyl ketone and toluene) is treated to separate dewaxing solvent by use of a separating membrane barrier of a polyurea.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: September 8, 1992
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Novel membrane and method of separation
    Patent number: 5141649
    Abstract: Charge compositions containing aqueous mixtures of organic oxygenates may be separated by pervaporation through a membrane assembly containing a porous ceramic support bearing as separating layer, a membrane of cured polyvinyl alcohol which has been cross-linked as with glutaraldehyde.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: August 25, 1992
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Uygur Kokturk, Mitri S. Najjar, Raymond D. Malouf
  • Membrane separation method
    Patent number: 5139677
    Abstract: A solution of isopropanol or ethanol is concentrated by pervaporation across a membrane of polyurea polymer or polyamide polymer prepared by interfacial polymerization of (i) an amine monomer containing at least two primary or secondary amine nitrogens and (ii) an isocyanate monomer containing at least two --NCO groups or a carbonyl chloride monomer containing at least two --COCl groups.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: August 18, 1992
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Membrane process for treating a mixture containing dewaxed oil and dewaxing solvent
    Patent number: 5102551
    Abstract: Charge containing dewaxed oil and dewaxing solvent (typically methyl ethyl ketone and toluene) is treated to separate dewaxing solvent by use of a separating elastomer membrane barrier of a polysiloxane which has been cross-linked as with toluene diisocyanate, adipoyl dichloride, a dialkoxy silane, or a diacetoxy silane.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: April 7, 1992
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Membrane process for treating a mixture containing dewaxed oil and dewaxing solvent
    Patent number: 5093002
    Abstract: Charge containing dewaxed oil and dewaxing solvent (typically methyl ethyl ketone and toluene) is treated to separate dewaxing solvent by use of a separating elastomer membrane barrier of a polysiloxane which has been cross-linked as with toluene diisocyanate, adipoyl dichloride, a dialkoxy silane, or a diacetoxy silane.
    Type: Grant
    Filed: July 5, 1991
    Date of Patent: March 3, 1992
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Desalination of water
    Patent number: 5037555
    Abstract: Desalination of water is effected by use of a polyimine membrane which has been cross-linked with a combination of aliphatic and aromatic polyisocyanate or with a polycarbonyl chloride cross-linking agent.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: August 6, 1991
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Abraham Morduchowitz
  • Membrane separation of N-methyl pyrrolidone/middle distillate streams
    Patent number: 5037556
    Abstract: An N-methyl pyrrolidone-containing middle distillate stream is separated by use of a polyethyleneimine membrane which has been cross-linked with a polyisocyanate or a poly(carbonyl chloride) cross-linking agent.
    Type: Grant
    Filed: December 31, 1990
    Date of Patent: August 6, 1991
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Ion exchange membrane
    Patent number: 5006576
    Abstract: A dilute solution of methyl ethyl ketone is concentrated by pervaporation through a fluorinated ion exchange membrane which has been exchanged with a quaternary ammonium cation.
    Type: Grant
    Filed: February 16, 1989
    Date of Patent: April 9, 1991
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Tansukhlal G. Dorawala
  • Process for pervaporization using membrane separating means
    Patent number: 5004861
    Abstract: Water is separated from an MEK toluene dewaxing solvent by pervaporation through a polyvinyl alcohol membrane (optionally containing polyacrylic acid) mounted on a polyacrylonitrile support layer.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: April 2, 1991
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Craig R. Bartels, John Reale, Jr.
  • Process for treating a charge containing dewaxing solvent and dewaxed oil
    Patent number: 4985138
    Abstract: Dewaxed oil containing dewaxing solvent from solvent dewaxing is treated by contact with a separating membrane to yield a retentate containing increased content of dewaxed oil and decreased content of dewaxing solvent and a permeate which contains increased content of dewaxing solvent and decreased content of dewaxing oil--the membrane including a polyimine layer which has been cross-linked with polyisocyanate or poly(carbonyl chloride).
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: January 15, 1991
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Separation of furfural/middle distillate streams
    Patent number: 4982051
    Abstract: A furfural-containing middle distillate stream is separated by use of a polyethyleneimine membrane which has been cross-linked with a polyisocyanate or a poly(carbonyl chloride) cross-linking agent.
    Type: Grant
    Filed: January 18, 1990
    Date of Patent: January 1, 1991
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, John Reale, Jr.