Catalyst – solid sorbent – or support therefor: product or process – Forming or treating a sphere – process only – Treating preformed sphere only
Patent
1989-02-22
1990-10-02
Garvin, Patrick P.
Catalyst, solid sorbent, or support therefor: product or process
Forming or treating a sphere, process only
Treating preformed sphere only
502 9, 502104, 502111, 502121, 502122, 502123, 502124, 502125, 502126, 502127, 526125, C08F 402, C08F 4649
Patent
active
049607413
ABSTRACT:
A process of the Ziegler-Natta type is prepared using a preactivated support containing (A) from 80 to 95 mol % of magnesium chloride and (B) 5 to 20 mol % of at least one electron donor compound which contains no labile hydrogen and no ester function; the preactivated support consisting of spherical particles having a mass average diameter, Dm of 10 to 100 microns and a particle size distribution Dm/Dn of less than 2. The catalyst is prepared by (i) treating the preactivated support with at least one electron donor compound containing labile hydrogen, (ii) treating the resulting activated support with at least one ester of an aromatic acid, (iii) impregnating the treated support with titanium tetrachloride and (iv) after washing the impregnated catalyst activating it with titanium tetrachloride. The catalyst has a high titanium content and a high activity when used to polymerize olefins.
REFERENCES:
patent: 4384984 (1983-05-01), Mink et al.
patent: 4399054 (1983-08-01), Ferraris et al.
patent: 4442224 (1984-04-01), Takitani et al.
Journal of Macromolecular Science--Reviews in Macromolecular Chemistry & Physics, vol. C24, No. 3, 1984, pp. 355-386. Marcel Dekker, Inc., New York, U.S., C. Dumas. Supported Propylene Polymerization Catalyst.
Bailly Jean-Claude A.
Sandis Stylianos
BP Chemicals Limited
Garvin Patrick P.
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