Polymn catalyst system - suitable for prodn of fibre-forming polyethylenes
Номер патента: FR2140496A1
Опубликовано: 19-01-1973
Автор(ы):
Принадлежит: Asahi Chemical Industry Co Ltd, Asahi Kasei Corp
Опубликовано: 19-01-1973
Автор(ы):
Принадлежит: Asahi Chemical Industry Co Ltd, Asahi Kasei Corp
Реферат: Ethylene is polymerised in a reaction medium in presence of a catalyst comprising a mixt. of (A) and (B) in molar ratio 10:1 to 1:100; (A) being a solid reaction product obtained by reacting TiCl4 with an organo-Al cpd R3'Al, R2"AlX or R'"AlX"X'" where R, R" and R'" are each 1-8C alkyl, and X', X" and X'" are each H, Cl, Br, I, phenoxy or alkoxy with 1-8C atoms or OSiR4R5R6 where R4, R5 and R6 are each H, phenoxy or 1-4C alkyl (the molar ratio TiCl4: organo-Al cpd. being 10:1 to 1:10) followed by sepn. of the resulting solid and reaction with O2 in ratio such that the molar ratio of the reacted O2: Ti is 1:1-100, and (B) an organo-Al cpd. R3'Al, R2"AlX', or R"'AlX"X"'. Minor amounts of 3-10C alpha-olefins may be present.
Supported dual transition metal catalyst systems
Номер патента: EP1399491A1. Автор: Keng-Yu Shih. Владелец: WR Grace and Co. Дата публикации: 2004-03-24.