METHOD OF MAKING ZIEGLER-NATTA TYPE CATALYSTS

摘要

A process for making a Ziegler-Natta-type catalyst precursor including contacting a Group 4 metal compound with one or more Titanium compounds selected from the group of TiCl 3 (Al-activated or hydrogen-reduced), and Ti(OR) 4 where R is ethyl, isopropyl or butyl in the presence of an alcohol solution having at least one C 2- C 4 alcohol and at least one of MgCl 2 and magnesium compounds which form MgCl 2 in the presence of the alcohol solution to form a catalyst precursor solution is provided. Also provided are catalysts made from the precursors produced by the process. Also provided are polymers made using the catalysts.