Catalysts for polyethylene production and use thereof

Details Catalysts for polyethylene production and use thereof Catalysts for polyethylene production and use thereof

1998-09-26

2000-08-01

Wood, Elizabeth D.

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

Catalyst or precursor therefor

Organic compound containing

502152, 502153, 502171, 502232, 502305, 502308, 502309, 502319, 502320, B01J 2104, B01J 2108, B01J 2326, B01J 3134

Patent

active

060966793

ABSTRACT:
A process for producing a chromium-based catalyst for the production of polyethylene, the process comprising the steps of providing a catalyst support selected from silica, silica-titania and silica-zirconia; reacting the support with one of an aluminium alkyl compound or a chromium salt compound selected from at least one of chromium (III) acetylacetonate, chromium (III) acetate, chromium (III) oxalate and chromium (III) stearate; and thereafter reacting the support with the other of the aluminium alkyl compound or the chromium salt to produce a chromium-impregnated catalyst having a silica-alumina support, the catalyst composition comprising from 0.4 to 1.5 wt % chromium, based on the weight of the chromium-based catalyst and the alumina in the silica-containing support comprising from 0.5 to 4 wt % aluminium in the chromium-based catalyst.

REFERENCES:
patent: 3755197 (1973-08-01), Hsieh
patent: 5079317 (1992-01-01), Tajima et al.
patent: 5723399 (1998-03-01), Takemoto et al.

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