C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/613
C08F 4/68 (2006.01) C08F 10/00 (2006.01) C08F 10/02 (2006.01) C08F 110/02 (2006.01)
Patent
CA 1263996
71285-8 Abstract of the Disclosure Process of polymerizing a monomer charge including ethylene by (1) drying an inorganic oxide having surface hydroxyl groups to form a support that is substantially free of adsorbed water, (2) reacting the surface hydroxyl groups of the support with at least a substantially stoichiometric amount of at least one organometallic compound corresponding to the formula RxM'yR''z, wherein M is a metal of Group III of the periodic table, R is all alkyl group containing 1 to 12 carbon atoms, R' and R" are independently selected from the group consisting of H, Cl, and alkyl and alkoxy groups containing 1 to 12 carbon atoms, x has a value of 1 to 3, and y and z both represent values of 0 to 2, the sum of which is not greater than 3-x, (3) reacting the thus-treated support with at least about 0.001 mol, per mol of organometallic compound, of at least one vanadium compound corresponding to a formula selected from (RO)nVOX3-n and (RO)mVX4-m, in which formulas R represents a C1-C18 monovalent hydrocarbon radical that is free of aliphatic unsaturation, X is Cl or Br, n has a value of 0 to 3, and m has a value of 0 to 4, (4) reacting the product of step 3 with at least about 0.1 mol, per mol of organometallic compound, of an alcohol containing 1 to 18 carbon atoms, (5) feeding the product into a gas-phase reaction zone, (6) feeding a trialkylaluminum into the gas-phase reaction zone in order to form a bed comprising the product and the trialkylaluminum, (7) fluidizing the bed with a gas mixture including ethylene, hydrogen and chloroform, (8) removing particulate polymerized substantially ethylene particles from the reaction zone, and (9) recycling unreacted gas mixture from the top of the reaction zone to the bottom of the reaction zone.
504612
Hsieh John T.t.
Pennington B. Timothy
Roling Paul V.
Hsieh John T.t.
Pennington B. Timothy
Roling Paul V.
Smart & Biggar
U.s.i. Chemical Co. Inc.
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