Supported chromium oxide catalyst

Details Supported chromium oxide catalyst Supported chromium oxide catalyst

1989-11-14

1992-11-17

Schofer, Joseph L.

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

Catalyst or precursor therefor

Phosphorus or compound containing same

502256, 502320, 526100, 526106, 526101, 526129, 526156, B01J 218, B01J 2326, B01J 27188, C08F 412, C08F 418, C08F 424

Patent

active

051643537

ABSTRACT:
A supported catalyst for ethene polymerization by Phillips catalysis is disclosed. The supported catalyst is prepared by (1) mixing a porous silicate in an inert, organic liquid to produce a silicate suspension, (2) providing an ester of phosphoric acid or phosphorous acid, (3) mixing an organic liquid, a chromium compound, and a trialkylaluminum compound to produce a chromium compound/aluminum compound and combining the silicate suspension, the phosphorus compound and the chromium compound/aluminum compound suspension. This resulting suspension is evaporated to dryness to form a catalyst intermediate. The catalyst intermediate is heated in nitrogen, then heated in an oxygen-containing atmosphere, and then heated again in nitrogen to produce an activated catalyst. The activated catalyst is suspended in an organic liquid and treated with an alkyl boron compound to produce the desired supported catalyst.

REFERENCES:
patent: 3242150 (1966-03-01), Scoggin
patent: 4007321 (1977-02-01), Scholz et al.
patent: 4146695 (1979-03-01), Van de Leemput
patent: 4496699 (1985-01-01), Rekers et al.
patent: 4547479 (1985-10-01), Johnson et al.
patent: 4640964 (1987-02-01), Johnson et al.

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