Process for preparing a Ziegler-type spherical catalyst for alph

Details Process for preparing a Ziegler-type spherical catalyst for alph Process for preparing a Ziegler-type spherical catalyst for alph

1997-11-18

1998-09-22

Wu, David W.

Catalyst, solid sorbent, or support therefor: product or process

Forming or treating a sphere, process only

Forming other than by liquid immersion

4234202, 423422, 423628, 423630, 502351, 502355, 502415, 526352, B01J 3508

Patent

active

058113622

ABSTRACT:
A proces for preparing a spherical support for the polymerization of alpha-olefins from an ammonium dawsonite which is spray-dryed and formed into spherical particles which are then calcined and impregnated with titanium to produce a spherical catalyst of good mechanical strength is described. Also described is the polymerization process which, in the presence of the spherical catalyst, yields polyolefin particles which preserve the spherical characteristics of the support, with low flow angle and good bulk density, as well as the product polyethylene obtained from the process.

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