Process for polymerisation of ethylene

摘要

The present invention is directed to a process for the production of high density polyethylene by polymerisation of ethylene in the presence of a supported chromium oxide based catalyst which is modified with an organic compound comprising oxygen and a nitrogen atom which is selected from the group consisting of saturated heterocyclic organic compounds with a five or six membered ring, amino esters and amino alcohols. Such organic compounds allow manufacturing of HDPE with increases molecular weight distribution and increased molecular weight.

主权项

1. A process for the production of high density polyethylene by polymerizing ethylene in the presence of a supported chromium oxide-based catalyst that is modified with an organic compound comprising an oxygen and a nitrogen atom, wherein the organic compound is an amino alcohol,
wherein the amino alcohol has the formula: wherein each R, independently the same or different, is a C1-C8 alkyl group, a C6-C10 aryl group, a C1-C8 cycloalkyl group, or a trifluoromethyl group, and R1 is a C1-C8 alkyl group, a C3-C8 cycloalkyl group, a C6-C10 aryl group or a C4-C16 alkyl substituted cycloalkyl group.