Реферат: 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.

Библиографическая ссылка: 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

Оригинальная: 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 CAPlusCA

Идентификаторы БД:

Web of science:	WOS:A1979KD14500008
РИНЦ:	30632257

Цитирование в БД: Пока нет цитирований