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).

  • Membrane process for separation of organic liquids
    Patent number: 4960519
    Abstract: A mixture of alcohol, such as methanol, and organic oxygenate, such as dimethyl carbonate, is treated to recover product of decreased methanol content by pervaporation across a composite membrane of a polyvinyl alcohol and a polyacrylic acid on a polyacrylonitrile support layer.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: October 2, 1990
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Craig R. Bartels, John Reale, Jr., Vatsal M. Shah
  • Separations of oxygenates
    Patent number: 4952318
    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: January 7, 1988
    Date of Patent: August 28, 1990
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Tansukhlal G. Dorawala
  • Concentration of water-ketone compositions
    Patent number: 4935144
    Abstract: Water is separated from methyl isobutyl ketone by pervaporation across a polyvinyl alcohol membrane.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: June 19, 1990
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Craig R. Bartels, John Reale, Jr.
  • Treatment of compositions containing water and organic oxygenates
    Patent number: 4910344
    Abstract: Aqueous compositions containing organic oxygenates such as methyl isobutyl ketone are treated by pervaporation through a polyvinyl alcohol/polyacrylic acid membrane to yield retentate containing increased concentration of oxygenate.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: March 20, 1990
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Craig R. Bartels, John Reale, Jr.
  • Solvent dewaxing process
    Patent number: 4898674
    Abstract: Solvent dewaxing of charge lubricating oil stocks requiring different ratios of methyl ethyl ketone to toluene is effected by adjusting the ratio of components in the dewaxing solvent by a membrane.
    Type: Grant
    Filed: March 24, 1988
    Date of Patent: February 6, 1990
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Tansukhlal G. Dorawala
  • Membrane process for separating gases from gas-liquid charge streams
    Patent number: 4897091
    Abstract: Gases such as carbon dioxide may be separated from rich liquor (such as methanol containing carbon dioxide) by passage of gas through a membrane which is the reaction product of (i) a polyamine and (ii) a polyisocyanate or a poly (carbonyl chloride).
    Type: Grant
    Filed: April 4, 1988
    Date of Patent: January 30, 1990
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Richard F. Beaupre
  • Separation of organic liquids
    Patent number: 4877529
    Abstract: Mixtures containing methanol and dimethyl carbonate or methanol and methyl t-butyl ether may be treated by pervaporation to cover product containing decreased quantity of methanol.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: October 31, 1989
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Craig R. Bartels, John Reale, Jr.
  • Treatment of water
    Patent number: 4872991
    Abstract: Aqueous liquor containing immiscible hydrocarbon liquid, such as produced water from an offshore petroleum drilling platform, is treated by gravity separation, skimming, and nanofiltration.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: October 10, 1989
    Assignee: Texaco Inc.
    Inventors: Craig R. Bartels, Tansukhlal G. Dorawala, Michael T. Stephenson, Mordechai Pasternak, John Reale, Jr.
  • Method of treating dilute aqueous solutions
    Patent number: 4865745
    Abstract: A dilute aqueous solution of isopropanol is concentrated by reverse osmosis across a membrane of polyethyleneimine which has been cross-linked with 2,4-toluene diisocyanate.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: September 12, 1989
    Assignee: Texaco Inc.
    Inventor: Mordechai Pasternak
  • Separation of organic liquids
    Patent number: 4798674
    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: March 10, 1988
    Date of Patent: January 17, 1989
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Craig R. Bartels, John Reale, Jr.