Patents Represented by Attorney A. D. Litt

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  • Preparation of high V.I. lube oils
    Patent number: 3974060
    Abstract: High boiling hydrocarbon feeds are converted to high V.I. lube oils in high yields by hydrotreating in a first stage over a hydrogenation catalyst and then hydrocracking in a second stage over a faujasite-base catalyst, such as Pd on H-faujasite, under conditions such that less than 15 wt.% conversion, based on feed to the second stage, to products boiling below 650.degree.F. occurs.
    Type: Grant
    Filed: December 29, 1971
    Date of Patent: August 10, 1976
    Assignee: Exxon Research and Engineering Company
    Inventors: Alexis Voorhies, Jr., Glen P. Hamner