Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Reexamination Certificate
2011-01-11
2011-01-11
Choi, Ling-Siu (Department: 1796)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
C502S103000, C502S113000, C502S104000, C502S125000, C526S144000, C526S124200, C526S124300, C526S352000
Reexamination Certificate
active
07867939
ABSTRACT:
The present invention relates to a catalyst for polymerization of ethylene, a process for preparing the same, and a method for controlling kinetic behavior of said catalyst in ethylene polymerization. Said catalyst contains a titanium-containing main catalyst component and a co-catalyst. The titanium-containing main catalyst component is prepared by reacting the following components: (1) a hydrocarbon solution of dialkylmagnesium compound of formula RMgR′.yEt3Al; (2) an alcohol compound of formula R1OH; (3) a silica support thermally activated at 200-800° C.; (4) an alkylaluminum compound of formula R2nAlCl3-n; (5) a linear halogenated alkane of formula R3X; and (6) a titanium compound of formula Ti(OR4)mCl4-m. The co-catalyst is an organoaluminum compound. Three different types of ethylene polymerization kinetic curves can be obtained by adjusting the temperature for thermally activating the silica support and the ratio of titanium to magnesium in the titanium-containing main catalyst component.
REFERENCES:
patent: 4330647 (1982-05-01), Sakurai et al.
patent: 4374753 (1983-02-01), Pullukat et al.
patent: 5589555 (1996-12-01), Zboril et al.
patent: 6723677 (2004-04-01), Estrada et al.
patent: 1235169 (1999-11-01), None
patent: 1297458 (2001-05-01), None
Xiao Mingwei
Ye Xiaofeng
Yu Shijiong
Birch & Stewart Kolasch & Birch, LLP
China Petroleum & Chemical Corporation
Choi Ling-Siu
Shanghai Research Institute of Chemical Industry
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