Process for the polymerisation of ethylene mixtures of ethylene with other 1-olefines

Abstract

Abstract 1. A process for the polymerization of ethylene or mixtures of ethylene containing up to 8 % by weight of a 1-olefin of the formula R**1-CH=CH2 in which R**1 denotes a linear or branched alkyl radical having 1 to 12 carbon atoms in solution or in suspension at a temperature of 0 to 150 degrees C and a pressure of 1 to 50 bar, in the presence of a mixed catalyst composed of a transition metal component (component A) and an organo-alumina compound (component B), the component B having been obtained by reacting an inorganic material containing water, as the result of adsorption or absorption, with an alumina trialkyl, which comprises carrying out the polymerization in the presence of a mixed catalyst in which the component B has been prepared by reacting water with an aluminum trialkyl in a molar ratio of aluminum trialkyl to water of 4:1 to 0.25:1 in the presence of a finely divided solid based on silicon dioxide and/or aluminum oxide in a ratio by weight of water to slid of 3:1 to 1:3 at a temperature of -20to 100 degrees C, and the component A represents a transition metal compound of the formula (cyclopentadienyl)2 MeRHal in wich R is cyclopentadienyl, a C1 to C6 alkyl radical or halogen, Hal denotes halogen and Me is titanium or zirconium.

Inventors

• 👤 Ludwig Dr. Böhm

Bibliographic Details