DE2630262

• Main Authors: CORNILS, BOY. DR., 4220 DINSLAKEN, DE, BIRNKRAUT, HANS-WALTER. DR., 4200 OBERHAUSEN, DE, LUTZE, SIEGFRIED. DR., 4650 GELSENKIRCHEN, DE, FALBE, JUERGEN. DR., 4220 DINSLAKEN, DE, FOERSTER, INGRID, 4330 MUELHEIM, DE, PAYER, WOLFGANG. DR., 4230 WESEL, DE, SCHNELLER, PETER. DR., 4200 OBERHAUSEN, DE, OTTERBEIN, KARL., 4200 OBERHAUSEN, DE
• Format: Patent
• Language: English
• Published: 03.01.1985
• Edition: 3
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

An improvement in a process for the preparation of an ethylene homopolymer or a copolymer of ethylene with an alpha -olefin containing 3 to 15 carbon atoms by contacting the monomer or mixture of monomers in solution, suspension or in gas phase at 20 DEG to 250 DEG C. at a pressure of 1 to 50 bar with a mixed catalyst comprising a chlorine containing titanium (III) compound and an organoaluminum compound in the presence of hydrogen, the improvement residing in employing as the organoaluminum compound a trialkylaluminum compound in an amount of 0.1 to 20 mol per mol titanium (III) compound and including in the polymerization mixture oxygen at a concentration of 0.001 to 0.1 volume percent based upon the amount of ethylene. By carrying out the polymerization by including oxygen in the polymerization reaction mixture and employing trialkylaluminum compound as the organoaluminum compound the mean molecular weight of the polymer can be regulated while obtaining a desired molecular weight distribution.