Catalyst – solid sorbent – or support therefor: product or process – Forming or treating a sphere – process only – Forming other than by liquid immersion
Patent
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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Da Silva Jaime Correia
De Figueiredo Cecilia Maria Ooelho
Petroleo Brasileiro S.A.--Petrobras
Wu David W.
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