Patents Represented by Attorney P. C. Bawden

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  • Sulphonic acids and sulphonates
    Patent number: 4618458
    Abstract: Purification of sulphuric acid rich sulphonic acids particularly those prepared by oleum sulphonation, by water washing, treatment with an olefine and final heat treatment.
    Type: Grant
    Filed: November 3, 1980
    Date of Patent: October 21, 1986
    Assignee: Exxon Research & Engineering Co.
    Inventors: Marcel Prillieux, Robert M. Laurent, Robert Tirtiaux