Process for preparing metallocenes

Details Process for preparing metallocenes Process for preparing metallocenes

C - Chemistry, Metallurgy

07

F

C07F 17/00 (2006.01) C07F 7/00 (2006.01)

Patent

CA 2100383

PROCESS FOR PREPARING METALLOCENES Abstract of the Disclosure A process is provided for preparing a transition metal compound of the formula: (RC5H4)2MX2, where R is hydrocarbyl or silahydrocarbyl of 1 to 10 carbon atoms, M is titanium or zirconium and X is halogen. The process comprises the steps of: (a) reacting Na(C5H5) with RX, where R and X are as defined above, in an organic solvent so as to form a reaction product mixture which includes RC5H4 and C5H5; (b) vacuum stripping the product mixture at ambient temperatures so as to remove substantially all of said C5H5 from said product mixture; (c) deprotonating the RC5H4; and (d) adding MX4, where M and X are as defined above, to the product mixture so as to react the RC5H4 and the MX4 and form said transition metal compound, the transition metal compound being substantially free of C5H5 containing impurities.

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