Polymerization catalyst and method

Claim 1

A catalyst for polymerizing one or more 1-olefins to an ultralow molecular weight and exceptionally broad molecular weight distribution, prepared by (1) forming a substantially dry intimate mixture of a finely divided support selected from the group consisting of silica, alumina, zirconia, thoria and mixtures thereof and an alkyl ester of titanium containing about 1-7 carbon atoms in the alkyl group in an amount to give about 1-10% of titanium on said support, (2) calcining said mixture from (1) to and at a temperature between about 400°-1000° C., (3) adding to the resulting calcined mixture from (2) an organotinchromate essentially of the formula ##STR4## wherein each R is an individually selected hydrocarbon radical containing from 1-14 carbon atoms in an amount to give about 0.1-10% chromium in the final catalyst, and (4) activating the product from (3) by heating to and at a temperature between about 300°-500° C. in the presence of oxygen.

Claim 8

The method of making a catalyst for polymerizing one or more 1-olefins to an ultralow molecular weight and exceptionally broad molecular weight distribution, prepared by (1) forming a substantially dry intimate mixture of a finely divided support selected from the group consisting of silica, alumina, zirconia, thoria and mixtures thereof and an alkyl ester of titanium containing about 1-7 carbon atoms in the alkyl group in an amount to give about 1-10% of titanium on said support, (2) calcining said mixture from (1) to and at a temperature between about 400°-1000° C., (3) adding to the resulting calcined mixtured from (2) an organotinchromate essentially of the formula ##STR5## wherein each R is an individually selected hydrocarbon radical containing from 1-14 carbon atoms in an amount to give about 0.1 -10% chromium in the final catalyst, and (4) activating the product from (3) by heating to and at a temperature between about 300°-500° C. in the presence of oxygen.

Claim 9

The method of making a catalyst for polymerizing one or more 1-olefins to an ultralow molecular weight and exceptionally broad molecular weight distribution, prepared by (1) forming a substantially dry intimate mixture of a finely divided support selected from the group consisting of silica, alumina, zirconia, thoria and mixtures thereof and an alkyl ester of titanium containing about 1-7 carbon atoms in the alkyl group in an amount to give about 1-10% of titanium on said support, (2) calcining said mixture from (1) to and at a temperature between about 400°-1000° C., (3) adding to the resulting calcined mixtured from (2) an organotinchromate essentially of the formula ##STR5## wherein each R is an individually selected hydrocarbon radical containing from 1-14 carbon atoms in an amount to give about 0.1 -10% chromium in the final catalyst, and (4) activating the product from (3) by heating to and at a temperature between about 300°-500° C. in the presence of oxygen.

Claim 15

The method of making polymers of ultralow molecular weight and exceptionally broad molecular weight distribution from one or more polymerizable 1-olefins which comprises polymerizing said one or more polymerizable1-olefins under polymerizing conditions with a catalyst prepared by (1) forming a substantially dry intimate mixture of a finely divided support selected from the group consisting of silica, alumina, zirconia, thoria and mixtures thereof and an alkyl ester of titanium containing about 1-7 carbon atoms in the alkyl group in an amount to give about 1-10% titanium on said support, (2) calcining said mixture from (1) to and at a temperature between about 400°-1000° C., (3) adding to the resulting calcined mixture from (2) an organotinchromate essentially of the formula ##STR6## wherein each R is an individually selected hydrocarbon radical containing from 1-14 carbon atoms in an amount to give about 0.1-10% chromium in the final catalyst, and (4) activating the product from (3) by heating to and at a temperature between about 300°-500° C.in the presence of oxygen.

Claim 16

The method of making polymers of ultralow molecular weight and exceptionally broad molecular weight distribution from one or more polymerizable 1-olefins which comprises polymerizing said one or more polymerizable1-olefins under polymerizing conditions with a catalyst prepared by (1) forming a substantially dry intimate mixture of a finely divided support selected from the group consisting of silica, alumina, zirconia, thoria and mixtures thereof and an alkyl ester of titanium containing about 1-7 carbon atoms in the alkyl group in an amount to give about 1-10% titanium on said support, (2) calcining said mixture from (1) to and at a temperature between about 400°-1000° C., (3) adding to the resulting calcined mixture from (2) an organotinchromate essentially of the formula ##STR6## wherein each R is an individually selected hydrocarbon radical containing from 1-14 carbon atoms in an amount to give about 0.1-10% chromium in the final catalyst, and (4) activating the product from (3) by heating to and at a temperature between about 300°-500° C.in the presence of oxygen.