| CLASSIFICATION | CommPat. Market |
| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 08.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Process for prepn of metallocene having 1 - 2 alkyls bonded to Group 4 metal (Metallocene II) from metallocene having 2 halo gen atoms bonded to Group 4 metal (Metallocene I) comprising (a) Mixing (i) Liquid aromatic hydrocarbon (ii) Crude impure pasty mixt. contg Metallocene I (> 50 %) & Li halide (10 %) to form anhydrous first mixt. (b) Mixing first mixt. (a) with (i) Soln of a organolithium compd in a anhydrous ether sol vent to form second mixt. (c) Separating solids from second mixt & recovering liquid por tion which consists of soln of Metallocene II (Claim 1) Claim 8: Claim 8 (a) Idem to Claim 1 (b) Idem. to Claim 1 (c) Idem. to claim 1 (d) Replacing all of original solvent of (c) with liquid paraffin hydrocarbon diluent to form a slurry (e) Recovering product solids Claim 22: Organolithium compd.: MeLi.nLiBr; n = 0 - 1 |
| PATENT PHOTOCOPY | Available on request |
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