Patents by Inventor Birgit Driessen

Birgit Driessen 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).

  • Polymerization of CO/olefin with nickel compound mercapto carboxylic acid reaction product catalyst
    Patent number: 5214126
    Abstract: A process for preparing polyketones (alternating polymers of carbon monoxide and one or more olefins) is provided. The process is characterized by using the nickel catalyst obtained by reacting a nickel compound, e.g. nickel acetate, nickel carbonyl or bis(cyclooctadiene) nickel(O), with a thiol-substituted carboxylic acid of formula HS--R--CO.sub.2 H (R is a divalent organic radical). Preferred thiol-substituted carboxylic acids include 2-mercaptobenzoic acid, 4-mercaptobenzoic acid, 2 mercaptonicotinic acid and compounds of formula HS--CHR.sup.2 --CO.sub.2 H where R.sup.2 is selected from hydrogen, --CH.sub.3 and --CH.sub.2 CO.sub.2 H.
    Type: Grant
    Filed: August 1, 1991
    Date of Patent: May 25, 1993
    Assignee: The British Petroleum Company, p.l.c.
    Inventors: Birgit Driessen, Michael J. Green, Wilhelm Keim