LOW ALUMINUM AND MAGNESIUM Z-N SOLUTION CATALYSTS, PROCESS FOR POLYMERIZATION OF OLEFINS IN A SOLVENT AND PROCESS THEREFOR

摘要

1. A catalyst consisting essentially of: (i) a mixture of an alkyi aluminum compound of the formula (R1)3AI and (R2)2Mg, wherein R1 is a C1-10 alkyl radical and R2 is a C1-10 alkyl radical in a molar ratio of Mg to Al from 4.0:1 to 5.5:1; (ii) a halide of the formula R3X, wherein R3 is a C1-8 alkyl radical and x is a halide selected from the group consisting of chlorine and bromine; (iii) titanium tetrachloride; and (iv) an alkyl aluminum alkoxide compound of the formula (R4)2AlOR, wherein R4 and R5 are independently selected from the group consisting of C1-10 alkyl radicals to provide: a molar ratio of Mg:Ti from 4:1 to 5.5:1; a molar ratio of aluminum alkyl to titanium tetrachloride from 1:1 to 1.5:1; a molar ratio of hafide to Mg from 1.9:1 to 2.5:1; and a molar ratio of alkyl aluminum alkoxide to titanium from 1.2:1 to 2:1. 2. The catalyst according to claim 1, wherein R1, R3, R4, and R5 are independently selected from the group consisting of C1-4 alkyl radicals. 3. The catalyst according to claim 2, wherein R2 is a C2-6 alkyl radical. 4. A process for the polymerization of a mixture consisting of at least 40 weight % of ethylene and up to 60 weight % of one or more C3-12 oletins comprising contacting said monomer mixture in a hydrocarbon solvent at a temperature from 105 degree C to 320 degree C and a pressure from 4 to 20 mPa with a catalyst consisting essentially of: (i) a mixture of an alkyi aluminum compound of the formula (R1)3AI and (R2)2Mg, wherein R1 is a C1-10 alkyl radical and R2 is a C1-10 alkyl radical in a molar ratio of Mg to Al from 4.0:1 to 5.5:1; (ii) a halide of the formula R3X, wherein R3 is a C1-8 alkyl radical and x is a halide selected from the group consisting of chlorine and bromine; (iii) titanium tetrachloride; and (iv) an alkyl aluminum alkoxide compound of the formula (R4)2AlOR, wherein R4 and R5 are independently selected from the group consisting of C1-10 alkyl radicals to provide: a molar ratio of Mg:Ti from 4:1 to 5.5:1; a molar ratio of aluminum alkyl to titanium tetrachloride from 1:1 to 1.5:1; a molar ratio of hafide to Mg from 1.9:1 to 2.5:1; and a molar ratio of alkyl aluminum alkoxide to titanium from 1.2:1 to 2:1. 5. The process according to claim 4, R1, R3, R4, and R5 are independently selected from the group consisting of C1-4 alkyl radicals. 6. The process according to claim 5, wherein R2is a butyl radical. 7. The process according to claim 6, wherein said monomer mixture comprises at least 50 weight % of ethylene and up to 50 weight % of one or more monomers selected from the group consisting of C3-12 olefins. 8. The process according to claim 7 wherein the pressure is from 8 to 20 mPa.