Activation of supported chromium oxide catalysts

Details Activation of supported chromium oxide catalysts Activation of supported chromium oxide catalysts

1979-05-03

1981-01-27

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

526106, B01J 2108, B01J 2326

Patent

active

042474213

ABSTRACT:
A method for activating supported chromium oxide catalysts in which a dry catalyst of inorganic or organic chromium compound dispersed on a silica-containing substrate (1) is contacted with a normally liquid organic aliphatic hydroxy compound, preferably at or above the boiling point of the hydroxy compound and (2) is reduced in a carbon monoxide containing environment and the reduced composition is reoxidized in an oxygen-containing environment to produce an activated catalyst. Steps (1) and (2) may take place in the opposite order, but both are necessary. A method for producing polymers of ethylene in which ethylene monomer, and suitable comonomer when used, are contacted at polymerization conditions in the presence of a catalyst activated by the method described above.

REFERENCES:
patent: 2951816 (1960-09-01), Hogan et al.
patent: 3239498 (1966-03-01), Witt
patent: 3882096 (1975-05-01), Shida et al.
patent: 3890249 (1975-06-01), Dietz et al.
patent: 4151122 (1979-04-01), McDaniel et al.
patent: 4169926 (1979-10-01), McDaniel

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