Abstract:
The invention provides a process for homopolymerizing or copolymerizing ethylene in the presence of mixed catalysts comprising as component A the reaction products of specific tetravalent titanium compounds with chlorine-containing magnesium compounds containing at least 1.5 moles of OH groups per gramatom of magnesium and as component B an organo-aluminum compound. Under a pressure below 20 atmospheres the yields are so high per unit of catalyst that the residues thereof need not be removed from the polymer. It is possible to produce polymers having a very narrow distribution of molecular weight and very good color and corrosion values.
Abstract:
PROCESS FOR HOMO- AND COPOLYMERIZING OLEFINS IN THE PRESENCE OF A MIXED CATALYST COMPRISING, AS COMPONENT A, A REACTION PRODUCT OF MAGNESIUM ALCOHOLATES WITH TETRAVALENT HALOGENATED TITANIUM COMPOUNDS AND, AS COMPONENT B, ORGANO-ALUMINUM COMPOUNDS. ALREADY UNDER A PRESSURE OF LESS THAN 20 ATMOSPHERES THE YIELDS PER CATALYST OBTAINED ARE SO HIGH THAT THE REMAINDERS OF CATALYST NEED NOT BE REMOVED FROM THE POLYMER. OPTIONALLY, PRODUCTS CAN ALSO BE PREPARED WHICH HAVE A VERY NARROW MOLECULAR WEIGHT DISTRIBUTION AND VERY GOOD COLOR AND CORROSION VALUES.
Abstract:
THE PRSENT INVENTION RELATES TO A PROCESS FOR THE POLYMERIZATION OF ETHYLENE OR MIXTURES OF ETHYLENE WITH UP TO 10% BY WEIGHT OF HIGHER A-OLEFINS IN THE PRESENCE OF A MIXED CATALYST COMPOSED OF A TRIVALENT CHLORINE-CONTAINING TITANIUM COMPOUND AND AN ALUMINIUM-ORGANIC COMPONENT OBTAINED BY REACTING ACETYLENES WITH ALUMINUM HYDROCARBONS.
Abstract:
The invention provides a process for homopolymerizing or copolymerizing ethylene in the presence of mixed catalysts comprising as component A the reaction products of specific tetravalent titanium compounds with halogen-free magnesium compounds containing 0.1 to 2 moles of OH groups per gram-atom of magnesium and as component B an organo-aluminum compound. Under a pressure below 20 atmospheres the yields are so high per unit of catalyst that the residues thereof need not be removed from the polymer. It is possible to produce polymers having a very narrow distribution of molecular weight and very good color and corrosion values.
Abstract:
1275142 Supported olefin polymerization catalyst FARBWERKE HOECHST AG 21 Aug 1969 [21 Aug 1968 6 June 1969] 41828/69 Heading C3P Olefins are polymerized in the presence of (a) the reaction product of a magnesium alcoholate, mainly acting as a carrier, and a tetravalent halogen-containing titanium compound and (b) an organo-aluminium compound. The titanium compound may be prepared in situ for reaction with the magnesium compound. The magnesium alcoholate may include halogen, sulphate, carboxylate or hydroxy groups. The alcoholate may be reacted with other inert inorganic compounds, particularly magnesium compounds containing hydroxy groups, prior to reaction with the titanium compound. The mixture of magnesium compounds may be obtained by directly mixing or by partial hydrolysis of the magnesium alcoholate. In examples, Mg(OCH 3 ) 2 , Mg(OC 2 H 5 ) 2 or mixtures thereof with Mg(OH) 2 are reacted with TiCl 4 , TiCl 4 / Ti(O - i - C 3 H 7 ) 4 mixture, TiCl 4 /Ti(O - i- C 4 H 9 ) 4 mixture, or TiCl 2 (O-i-C 3 H 7 ) 2 and then mixed with Al(i-C 4 H 9 ) 3 , Al(C 2 H 5 ) 3 , Al(C 2 H 5 ) 2 H, or Al 2 Cl 3 (C 2 H 5 ) 3 and the catalysts used to polymerize ethylene or an ethylene/butene mixture.