Method for polymerizing ethylene by means of a novel titanium containing catalyst
AssigneeUbe Industries, Ltd.
InventorsHaruo Ueno, Takefumi Yano, Michimasa Shimizu, Masanori Tamura, Sakae Yuasa
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Abstract
An ethylene polymer is produced with an excellent yield by bringing a feed containing ethylene into contact with a catalyst which comprises (A) a solid catalytic ingredient prepared (a) by reacting a Grignard compound with an aluminium halide-tetraalkoxysilane reaction product and (b) bringing the resultant reaction product into contact with titanium tetrahalide and; (B) another catalytic ingredient consisting of a trialkyl aluminium.
Claims15
A method for polymerizing ethylene which comprises bringing a feed containing ethylene into contact with a catalyst comprising (A) a solid catalytic ingredient formed by reacting (a) an aluminum halide with a tetraalkoxysilane of the formula Si(OR.sup.1).sub.4 wherein R.sup.1 is an alkyl radical having 1 to 8 carbon atoms, and the ratio of aluminum halide to tetraalkoxysilane is from 0.25:1 to 10:1;
- (b) reacting at a temperature of from -50.degree. to 100.degree. C., the reaction product of step (a) with a compound of the formula R.sup.2 MgX wherein R.sup.2 is an alkyl radical having 1-8 carbon atoms and X is a halogen atom wherein the R.sup.2 MgX compound is used in a mole ratio of 0.05:1 to 4:1 per mole of the tetraalkoxysilane used in step (a) to form a solid reaction product;
- (c) contacting at a temperature of from about 20.degree. C. to 200.degree. C., the reaction product of step (b) with at least 1 mole of titanium tetrahalide per mole of the compound of the formula R.sup.2 MgX used in step (b), and (B) a catalytic ingredient consisting essentially of at least one trialkyl aluminum compound.
Dependencies are inferred from the claim text.