Olefin polymerization over pi-olefin complex of chromium support

Details Olefin polymerization over pi-olefin complex of chromium support Olefin polymerization over pi-olefin complex of chromium support

1990-07-23

1993-02-02

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526134, 526154, 526160, 526352, 502102, 502117, 502118, 502132, 502152, 502154, C08F 469, C08F 4622

Patent

active

051838680

ABSTRACT:
Olefins are polymerized using, as a catalyst, a pi-olefin complex of a transition metal supported on aluminophosphate. The most effective complexes are cycloheptatrienyl-(1,3-cycloheptadiene)chromium(-1) compounds and alkyl-substituted derivatives thereof. A metal alkyl co-catalyst, such as triethylborane or triethylaluminum, can also be present. The catalyst is best suited for forming ethylene polymers and copolymers. Both the polymerization process using the described catalyst, and the catalyst system, per se, constitute different aspects of the invention.

REFERENCES:
patent: 4105844 (1978-08-01), McDaniel
patent: 4424139 (1984-01-01), McDaniel et al.
Chem. Ber. 105, 3346-3356 (1972) Muller Und. Mertschenk.

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