Process for producing polyolefins

Details Process for producing polyolefins Process for producing polyolefins

1995-07-14

1997-07-15

Wu, David W.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526106, 526118, 526119, 5263482, 5263484, 5263485, 5263486, 526351, 526352, 502113, C08F 424

Patent

active

056484399

ABSTRACT:
A process is provided to produce polyolefins having a multimodal molecular weight distribution at the molecular level by contacting at least one mono-1-olefin in a polymerization zone, under polymerization conditions, with two different types of supported chromium catalyst systems. The first catalyst system comprises a chromium oxide catalyst system which comprises chromium oxide supported on an inorganic oxide. The second catalyst system comprises a chromocene catalyst system which comprises chromocene supported on an inorganic oxide. The resultant, recovered polymer has a multimodal, or at least a bimodal, molecular weight distribution.

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