Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing
Patent
1997-12-24
1999-08-10
Nazario-Gonzalez, Porfirio
Organic compounds -- part of the class 532-570 series
Organic compounds
Heavy metal containing
556 53, 556 56, 526160, 526943, 502103, 502117, C07F 1700, C07F 700
Patent
active
059361085
ABSTRACT:
A metallocene having one or two hydrocarbyl groups bonded to a Group 4 metal are produced from a crude impure pasty or non-wet mixture containing at least 50% by weight of a metallocene having two halogen atoms bonded to a Group 4 metal atom, by (a) mixing liquid aromatic hydrocarbon with the crude impure pasty or non-wet mixture; (b) mixing a solution of an organolithium compound in a suitable anhydrous ether or paraffinic hydrocarbon solvent or a mixture thereof, with the mixture from (a) and agitating the resulting mixture so that lithium halide solids are formed; and (c) separating the solids and recovering the resultant liquid portion which is mainly a solution of the metallocene having one or two hydrocarbyl groups bonded to a Group 4 metal. Additional optional steps include (d) replacing the original solvent from the solution from (c) with a liquid paraffinic hydrocarbon diluent to form a slurry of product solids; and (e) recovering the product metallocene solids. Preferred organolithium compounds have the formula, RLI.nLiX, where R is tert-alkyl, aryl, alkaryl, benzyl, or alkyl-substituted benzyl, or most preferably, methyl, and X is Br or I.
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Balhoff John F.
Berris Bruce C.
DeSoto Troy E.
Lin Ronny W.
Power John M.
Albemarle Corporation
Nazario-Gonzalez Porfirio
Pippenger Philip M.
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