Ethylene polymerization process

Details Ethylene polymerization process Ethylene polymerization process

1978-08-01

1981-11-03

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526114, 526116, 526119, 526121, 526128, 526142, 526155, 526902, C08F 202, C08F 206, C08F 1002

Patent

active

042987172

ABSTRACT:
A process for polymerizing ethylene under high pressure and temperature in at least one reactor having at least one reaction zone. A catalyst system is used that comprises (a) an activator selected from trialkylaluminums, hologenodialkylaluminums, and alkylsiloxalanes, (b) a halogen compound of a transition metal of groups IV to VI A, and (c) a complexing agent that is injected into the reactor in such a manner that its concentration in the reactor may be adjusted independently from the concentration of (b). The complexing agent may be selected from silicone oils and from compounds having the formula X(OR).sub.n, wherein X is hydrogen or a metal, n is the valence of X, and R is an alkyl radical of up to 20 carbon atoms.

REFERENCES:
patent: 2956993 (1960-10-01), Nowlin et al.
patent: 3058972 (1962-10-01), Fourcad et al.
patent: 3061602 (1962-10-01), Duck et al.
patent: 3629212 (1971-12-01), Benedikter et al.
patent: 3929754 (1975-12-01), Gloriod et al.
patent: 4133944 (1979-01-01), Cooper et al.

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