Polymerization of carbon monoxide/olefin with P ligand having polar aryl group
AssigneeShell Oil Company
InventorsJohannes A. M. Van Broekhoven, Richard L. Wife
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Abstract
A polymerization process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon employs a catalyst composition formed from a palladium compound, the anion of certain non-hydrohalogenic acids and certain bidentate ligands having ortho polar substitution within at least one monovalent phosphorus substituent and optionally a quinone. The polymer product is obtained in the form of globules.
Claims10
In the process of producing linear alternating polymers by contacting under polymerization conditions carbon monoxide and at least one ethylenically unsaturated hydrocarbon in the presence of a catalyst composition formed from a palladium compound, an anion of a non-hydrohalogenic acid having a pKa less than 2 and bidentate phosphorus ligand, the improvement wherein the bidentate phosphorus ligand has the formula R.sup.1 R.sup.2 -P-R-P-R.sup.3 R.sup.4 wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently are aryl groups of from 6 to 20 carbon atoms inclusive and R is a divalent bridging group of from 1 to 20 carbon atoms inclusive and of from 2 to 4 carbon atoms inclusive in the phosphorus-phosphorus bridge, with the provision that at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is substituted with a polar group in a position ortho to the phosphorus.
In the process of producing linear alternating polymers by contacting under polymerization conditions carbon monoxide and at least one ethylenically unsaturated hydrocarbon in the presence of a catalyst composition formed from a palladium compound, an anion of non-hydrohalogenic acid having a pKa less than 2 and a bidentate phosphorus ligand, the improvement wherein the bidentate phosphorus ligand has the formula R.sup.1 R.sup.2 -P-R-P-R.sup.3 R.sup.4 wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently are aryl groups of from 6 to 20 carbon atoms inclusive and R is a divalent bridging group of up to 20 carbon atoms inclusive and from 2 to 4 carbon atoms inclusive in the phosphorus-phosphorus bridge, with the proviso that at least one of the R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is substituted with a polar group in a position ortho to the phosphorus, and recovering the linear alternating polymer as globular particles of from about 0.05 mm to about 5 mm in diameter.
Dependencies are inferred from the claim text.