Patents by Inventor Murray R. Silk

Murray R. Silk 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).

  • Manufacture of hydrocracked low pour lubricating oils
    Patent number: 4283272
    Abstract: Hydrocracked, low pour lubricating oils of good stability are manufactured by passing a suitable hydrocarbon feed and hydrogen sequentially through a hydrocracking zone, a catalytic dewaxing zone, and a hydrotreating zone, all at high pressure and in that order, with purification of the hydrogen gas prior to passage to the dewaxing zone. By maintaining all zones at high pressure, the efficiency of the process is augmented.
    Type: Grant
    Filed: June 12, 1980
    Date of Patent: August 11, 1981
    Assignee: Mobil Oil Corporation
    Inventors: William E. Garwood, Murray R. Silk
  • Manufacture of hydrocracked low pour lubricating oils
    Patent number: 4283271
    Abstract: Hydrocracked, low pour lubricating oils of good stability are manufactured by passing a suitable hydrocarbon feed sequentially through a hydrocracking zone, a catalytic dewaxing zone, and a hydrotreating zone, all at high pressure and in that order, and with separation of hydrocrackate from recycle hydrogen prior to dewaxing. Only clean makeup hydrogen is fed to the dewaxer, passed through the hydrotreater, and then on to the hydrocracker, thereby providing an exceptionally efficient process.
    Type: Grant
    Filed: June 12, 1980
    Date of Patent: August 11, 1981
    Assignee: Mobil Oil Corporation
    Inventors: William E. Garwood, Murray R. Silk
  • Reclaiming wax contaminated lubricating oils
    Patent number: 4269695
    Abstract: Dewaxed lube base stock oil which forms a wax haze on storage at a temperature above its cloud point is treated by contacting the oil and hydrogen with a zeolite catalyst such as ZSM-5 to eliminate the wax-haze formation. The method may be used to reclaim wax-contaminated lube base stock oils and other wax-contaminated hydrocarbon oils.
    Type: Grant
    Filed: August 1, 1979
    Date of Patent: May 26, 1981
    Assignee: Mobil Oil Corporation
    Inventors: Murray R. Silk, Richard T. Cleveland