Catalyst comprising chromium on silica/phosphate support

Details Catalyst comprising chromium on silica/phosphate support Catalyst comprising chromium on silica/phosphate support

1980-12-31

1982-12-21

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252428, 252432, 252437, 526129, 526106, C08F 402, C08F 462

Patent

active

043648398

ABSTRACT:
In one embodiment of this invention, a chromium component is supported on a silica/aluminum orthophosphate combination and used with an organometal cocatalyst. In accordance with other embodiments of the invention, the silica/phosphate combination for a chromium catalyst support is produced by either impregnating a silica xerogel with aluminum phosphate or boron phosphate, precipitating aluminum phosphate in the presence of a silica hydrogel, or physically mixing silica and aluminum phosphate xerogels. The resulting catalysts are capable of producing high melt flow olefin polymers and exhibit high activity. The resulting polymers have many unusual and desirable characteristics, such as high density and good environmental stress crack resistance.

REFERENCES:
patent: 2840551 (1958-06-01), Field et al.
patent: 2938001 (1960-05-01), de Rosset
patent: 3211801 (1965-10-01), Holm et al.
patent: 3271299 (1966-09-01), Kearby
patent: 3342750 (1967-09-01), Kearby
patent: 3453219 (1969-07-01), O'Hara
patent: 3780011 (1973-12-01), Pullukat et al.
patent: 3907849 (1975-09-01), Meyer
patent: 3985676 (1976-10-01), Rekers et al.
patent: 4118340 (1978-10-01), Rekers
patent: 4192775 (1980-03-01), Rekers et al.
patent: 4248735 (1981-02-01), McDaniel et al.

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