Patents by Inventor Craig R. Bartels

Craig R. Bartels 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).

  • Dehydration of organic oxygenates
    Patent number: 4961855
    Abstract: Concentration of aqueous solutions of isopropanol may be effected by a composite membrane including a glutaraldehyde cross-linked polyvinyl alcohol bonded to a porous layer of polysulfone on a polyester backing.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: October 9, 1990
    Assignee: Texaco Inc.
    Inventors: John Reale, Jr., Craig R. Bartels
  • 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
  • Dehydration of glycols
    Patent number: 4941976
    Abstract: Concentration of aqueous solutions of ethylene glycol may be effected by a composite membrane including a glutaraldehyde-crosslinked polyvinyl alcohol bonded to a porous layer of polysulfone on a polyester backing.
    Type: Grant
    Filed: August 23, 1988
    Date of Patent: July 17, 1990
    Assignee: Texaco Inc.
    Inventors: Craig R. Bartels, John Reale, Jr.
  • 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.
  • 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.
  • Dehydration of glycols
    Patent number: 4802988
    Abstract: Concentration of aqueous solutions of ethylene glycol may be effected by a composite membrane including a glutaraldehyde--crosslined polyvinyl alcohol bonded to a porous layer of polysulfone on a polyester backing.
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: February 7, 1989
    Assignee: Texaco Inc.
    Inventors: Craig R. Bartels, John Reale, Jr.
  • 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.