PROCESS FOR THE POLYMERISATION OR COPOLYMERISATION OF ETHYLENE WITH THE USE OF A CATALYST ORTED BY A CARRIER

摘要

1,189,038. Ethylene polymerization. MITSUI PETROCHEMICAL INDUSTRIES Ltd. 12 Nov., 1968 [11 Sept., 1968], No. 53652/68. Heading C3P. Ethylene is polymerized in an inert solvent using a catalyst comprising an organoaluminium and or dialkyl zinc compound, and a compound containing a halogen and titanium or vanadium, said compound being chemically bonded to magnesium hydroxide particles of an average diameter of 1Á to 70Á and a specific surface area of 20 to 100 m.2/g. The magnesium hydroxide particles may be subjected to a heat treatment at 100 to 1000‹ C. The chemical bonding may take place by mixing the transition metal halide and magnesium hydroxide, in the absence of water and oxygen. In the examples, ethylene is homopolymerized, or copolymerized with propylene or butene, in an inert solvent, in the presence of hydrogen and in the presence of a catalyst comprising (a) magnesium hydroxide chemically bonded to titanium tetrachloride, tetrabromide, ethoxytrichloride, di-(n-butoxy) di-chloride, tri-(isoproproxy) chloride, vanadium tetrachloride or oxytrichloride and (b) triethyl-, tri-isobutyl-aluminium, diethyl aluminium chloride, diethyl aluminium ethoxide, diisobutyl aluminium hydride, ethylaluminium sesquichloride or diethyl zinc. The polymer is extruded and dried, and subjected to pelletizing, spinning and shaping tests.