Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1980-05-21
1981-10-20
Dees, Carl F.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252456, 252458, 252463, 252464, 252465, B01J 2320, B01J 2324, B01J 2100
Patent
active
042959993
ABSTRACT:
Polymerization catalysts are prepared by impregnation of a silica or aluminum support with a vanadium, titanium and/or chromium salt decomposable upon calcination to the oxide, calcining the impregnated support at about 500.degree.-700.degree. C., impregnating the calcined support with a solution of aluminum hydride and heating the resultant material to about 300.degree. C.-500.degree. C. in hydrogen. The catalyst is extremely active for the polymerization of lower molecule weight olefins such as ethylene and ethylene-propylene mixtures.
REFERENCES:
patent: 2731452 (1956-01-01), Field et al.
patent: 2912419 (1959-11-01), Peters et al.
patent: 3415759 (1968-12-01), Johnson
patent: 3526601 (1970-09-01), Fotis, Jr. et al.
patent: 3780011 (1973-12-01), Pullukat et al.
patent: 3897364 (1975-07-01), Colombo et al.
Dees Carl F.
Shell Oil Company
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