Patent ID: 9376518
Filing Date: 2016-06-28
CPC Classification: C08F

Claim Text:
1. A process comprising: 1) contacting a deprotonated bridged bis(indenyl) compound with a rac-directing metallation reagent to form a product mixture comprising at least 51 mol % of racemic isomer of a bridged bis(indenyl)metallocene transition metal compound based on the total amount of racemic isomer and meso isomer formed, wherein the rac-directing metallation reagent is represented by the formula: the deprotonated bridged bis(indenyl) compound is represented by the formula: wherein each of R wherein the bis(indenyl)metallocene transition metal compound is represented by the formula: wherein d is the coordination number of the metal, M, and is 4, 5 or 6, e is 2, 3, 4 or 5, f is 1, 2, 3 or 4 and g is 0, 1 or 2; wherein M is a Group 4, 5, or 6 metal of the periodic table of the elements; wherein A is a divalent radical represented by the formula: where R wherein each X is a halogen, a triflate or pseudohalogen; wherein each of Y, Y wherein each of R wherein each Z is, independently, a leaving group comprising a monovalent C where e+f=d; 2) supporting the bridged bis(indenyl)metallocene transition metal compound on a support material; 3) contacting the bridged bis(indenyl)metallocene transition metal compound with an activator to form a catalyst system, where the activator comprises alumoxane and the alumoxane is present at a ratio of 1 mole aluminum or more per mole of bridged bis(indenyl)metallocene transition metal compound; and 4) contacting one or more olefins with the catalyst system at polymerization conditions to produce a polyolefin.