Dry polymerization of olefins in reaction vessels arranged in se

Details Dry polymerization of olefins in reaction vessels arranged in se Dry polymerization of olefins in reaction vessels arranged in se

1976-05-24

1977-09-13

Holler, Alan

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

Synthetic resins

Polymerizing in two or more physically distinct zones

260878B, 526 66, 526 67, 526 68, C08F 234, C08F 1000, C08F29708

Patent

active

040484122

ABSTRACT:
The dry polymerization of olefins to produce polymers having a molecular weight above 50,000 in the presence of a catalyst system formed of a compound of a transition metal and a co-catalyst of an organo-metallic compound of a metal of Groups II or III of the periodic table, in which the polymerization reaction is carried out in a series of reaction vessels wherein the formed polymer is transferred from one to the other and in which additional co-catalyst is added to reaction vessels beyond the first, the gaseous effluent from each reaction vessel is recycled back to the reaction vessel and in which the co-catalyst is introduced into the first reaction vessel in an amount such that the atomic ratio of the metal of the co-catalyst to the transition metal is within the range of 0.1 to 10, and in which the co-catalyst is introduced into vessels other than the first in an amount such that the atomic ratio of metal of the co-catalyst to the transition metal is within the range of 0.1 to 20.

REFERENCES:
patent: 2889314 (1959-06-01), Fritz
patent: 3338986 (1967-08-01), Leibson et al.
patent: 3341622 (1967-09-01), Leibson et al.
patent: 3345431 (1967-10-01), Harban
patent: 3514501 (1970-05-01), Leibson et al.
patent: 3770714 (1973-11-01), Dorschner et al.
patent: 3776979 (1973-12-01), Hill
patent: 3922322 (1975-11-01), Dormenval et al.
patent: 3931134 (1976-01-01), Hartmann et al.
patent: 3954909 (1976-05-01), Havas et al.

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