Method for preparing metal cyanide catalysts using polymerizable complexing agents
AssigneeDow Global Technologies LLC
InventorRichard M. Wehmeyer
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Abstract
Complexes of a metal cyanide polymerization catalyst and certain monomer complexing agents provide a method whereby heterogeneous, active metal cyanide catalysts can be prepared. The catalysts are useful alkylene oxide polymerization catalysts that are easily separated from the polymerization product and recycled.
Claims39
A catalyst complex comprising a water insoluble metal cyanide catalyst that is complexed with a monomer complexing agent that has at least one polymerizable site of carbon-carbon unsaturation.
A polymer having dispersed therein a metal cyanide catalyst that is complexed with said polymer.
A method of making a polymerization catalyst, comprising
- a) treating a metal cyanide catalyst with a complexing agent having at least one site of polymerizable carbon-carbon unsaturation, and
- b) subjecting said treated catalyst to conditions sufficient to polymerize said complexing agent to form a polymer containing the metal cyanide catalyst dispersed within it.
Dependencies are inferred from the claim text.