Polymerization of CO/olefin with nickel compound mercapto carboxylic acid reaction product catalyst
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United States of America Patent
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May 25, 1993
Grant Date -
N/A
app pub date -
Aug 1, 1991
filing date -
Aug 9, 1990
priority date (Note) -
Expired
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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.
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