Producing polyolefin products
AssigneeUnivation Technologies, LLC
InventorsFrancis C. Rix, Alexander D. Todd, C. Jeff Harlan
Life of this patent
Estimating the term…
Abstract
Catalyst systems and methods for making and using the same. A method of methylating a catalyst composition while substantially normalizing the entiomeric distribution is provided. The method includes slurrying the organometallic compound in dimethoxyethane (DME), and adding a solution of RMgBr in DME, wherein R is a methyl group or a benzyl group, and wherein the RMgBr is greater than about 2.3 equivalents relative to the organometallic compound. After the addition of the RMgBr, the slurry is mixed for at least about four hours. An alkylated organometallic is isolated, wherein the methylated species has a meso/rac ratio that is between about 0.9 and about 1.2.
Claims1
A method of alkylating an organometallic compound while substantially normalizing stereochemical configuration, comprising:
- slurrying the organometallic compound in ether;
- adding a solution of RLi in ether, wherein R is a methyl group or a benzyl group, and wherein the RLi is greater than about 2.3 equivalents relative to the organometallic compound;
- mixing for at least about four hours to form an alkylated organometallic compound;
- and
- isolating the alkylated organometallic, wherein the alkylated species has a meso/rac ratio that is between about 0.9 and about 1.2.
Dependencies are inferred from the claim text.