Composition of the Ethylene-Polymerization Catalyst Obtained on Reaction of bis(Triphenylsiloxyl) Chromite with Silica-Gel Full article
Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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Output data | Year: 1979, Volume: 20, Number: 6, Pages: 1265-1271 Pages count : 7 | ||
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Abstract:
The composition of the catalyst (A) obtained by deposition of (Ph3SiO)2CrO2 (I) on silica gel was detected by chemical analysis and IR spectroscopy, and the effect was investigated of various methods of activation of A (treatment with Et3Al , heating at 400° in vacuo or in air) on its composition and activity in polymerisation of ethylene. I was adsorbed on silica gel forming H-bonded complexes with isolated OH groups, rather than undergoing protolysis producing covalently bonded complexes. Heating of A at 400° decreased the oxidation state of Cr and deactivated the catalyst, apparently with products of thermal decomposition of I. Heating of A in air followed by vacuum treatment (400°, 10-3 torr) removed all Ph group of the complex, destroyed the H-bonds, fully regenerated the OH groups, and reduced Cr. Et3Al reacted with free and complexed OH groups of A; this resulted in covalent bonding of Cr compds. with the support and reduction of the former to lower oxidation states.
Cite:
Lesnikova N.P.
, Zakharov V.A.
, Paukshtis E.A.
, Yurchenko E.N.
, Demin E.A.
, Ermakov Y.I.
Composition of the Ethylene-Polymerization Catalyst Obtained on Reaction of bis(Triphenylsiloxyl) Chromite with Silica-Gel
Kinetics and Catalysis. 1979. V.20. N6. P.1265-1271. WOS РИНЦ
Composition of the Ethylene-Polymerization Catalyst Obtained on Reaction of bis(Triphenylsiloxyl) Chromite with Silica-Gel
Kinetics and Catalysis. 1979. V.20. N6. P.1265-1271. WOS РИНЦ
Original:
Лесникова Н.П.
, Захаров В.А.
, Паукштис Е.А.
, Юрченко Э.Н.
, Демин Э.А.
, Ермаков Ю.И.
Исследование состава катализатора полимеризации этилена, получаемого при взаимодействии бис-трифенилсилилхромата с силикагелем
Кинетика и катализ. 1979. Т.20. №6. С.1533-1540. РИНЦ
Исследование состава катализатора полимеризации этилена, получаемого при взаимодействии бис-трифенилсилилхромата с силикагелем
Кинетика и катализ. 1979. Т.20. №6. С.1533-1540. РИНЦ
Identifiers:
Web of science | WOS:A1979KD14500008 |
Elibrary | 30632257 |
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