Process for polymerizing a monomer charge

Details Process for polymerizing a monomer charge Process for polymerizing a monomer charge

1985-03-21

1987-05-12

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 87, 526 88, 526124, 526129, 526142, 526144, 526901, C08F 234, C08F 1002

Patent

active

046651381

ABSTRACT:
Process of polymerizing a monomer charge including ethylene by (1) drying an inorganic oxide having surface hydroxyl groups, e.g. silica, alumina, magnesia, etc. to remove adsorbed water (2) reacting the surface hydroxyl groups with at least a stoichiometric amount of an organometallic compound having at least one alkyl group attached to a Group III metal, e.g., a trialkylaluminum, (3) reacting the thus-treated inorganic oxide with a vanadium halide, such as (a) VOCl.sub.3, VOBr.sub.3, and/or mono-, di-, and/or trihydrocarbyloxy derivatives thereof and/or (b) VCl.sub.4, VBr.sub.4, and/or mono-, di-, tri-, and/or tetrahydrocarbyloxy derivatives thereof, (4) reacting that reaction product with at least about 0.1 mol, per mol of organometallic compound, of an ether-alcohol corresponding to the formula R"[OCHR'(CH.sub.2).sub.n CHR].sub.m OH, wherein R and R' are independently selected from the group consisting of hydrogen and alkyl groups containing 1 to 18 carbon atoms, R" is a hydrocarbyl group, n has a value of 0 to 16, and m has a value of at least 1, (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 of ethylene, hydrogen and chloroform, (8) removing polymerized 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.

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