Method for activating supported chromium oxide catalysts and ole

Details Method for activating supported chromium oxide catalysts and ole Method for activating supported chromium oxide catalysts and ole

1991-10-23

1993-04-06

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526352, C08F 424, C08F 1002

Patent

active

052004783

ABSTRACT:
A method for activating supported chromium oxide catalysts in which a chromium-containing catalyst on a silica-containing base is first heated in an oxidizing atmosphere at temperatures up to about 850.degree. C. and then cooled down. During the cooling step of the catalyst, the oxidizing atmosphere is replaced by a non oxidizing one, leading to an activated catalyst.
A process for the polymerization of alpha-olefins, especially ethylene, in which at least one alpha-olefin is contacted, under polymerization conditions, with the catalyst activated by the method described above.

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