Process for the manufacture of a support for olefin polymerizati

Details Process for the manufacture of a support for olefin polymerizati Process for the manufacture of a support for olefin polymerizati

1996-07-19

1999-07-20

Wu, David W.

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

Catalyst or precursor therefor

Phosphorus or compound containing same

502232, 502344, 502407, 502414, 526104, 526126, 526135, B01J 2714

Patent

active

059255897

ABSTRACT:
Process for the manufacture of a support for olefin polymerization catalysts comprising silica, aluminium phosphate and optionally alumina, according to which a source of silica, chosen from alkaline aqueous silica sols and alkaline aqueous solutions of inorganic silicate, is added, in a first step, to an aqueous solution of a source of phosphate ions which has a pH of less than 5, the pH of the medium being maintained below 5 throughout the first step, an aluminium compound is added, in a second step, to the medium obtained from the first step and a precipitate is formed, in a third step, by adding a precipitation agent to the medium obtained from the second step, the pH of the precipitation medium being maintained above or equal to 5.

REFERENCES:
patent: 3609099 (1971-09-01), Mickeolson
patent: 3650783 (1972-03-01), Yates
patent: 4397761 (1983-08-01), McDaniel et al.

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