C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 17/00 (2006.01)
Patent
CA 2328728
Group 4 metallocenes are separated from hydrocarbonaceous tarry material typically formed during their synthesis. This is done by mixing polar organic solvent and non-polar organic solvent with the impure mixture, these solvents being substantially incompatible with each other (e.g., acetonitrile and hexanes), so that after the mixing there are formed at least two separate phases comprising (i) a polar phase comprising mostly metallocene and the polar solvent, and (ii) a non-polar phase comprising mostly non-polar organic solvent and hydrocarbonaceous tarry material, and some metallocene. After separating these phases the non-polar phase is extracted with fresh polar organic solvent to form another polar phase comprising mainly metallocene and polar organic solvent. The metallocene can then be recovered from the polar phases, for example by distillation.
L'invention concerne la séparation entre des alliages organométalliques du groupe 4 et les matériaux goudronneux hydrocarbonés qui se forment généralement durant la synthèse de ces produits. Pour cela, on combine solvant organique polaire ainsi que solvant organique non polaire avec le mélange impur - les solvants en question étant sensiblement incompatibles entre eux (par exemple, acétonitrile et hexanes) - de manière à obtenir après combinaison au moins deux phases séparées, à savoir (i) une phase polaire principalement à alliage organométallique et solvant polaire, et (ii) une phase non polaire principalement à solvant organique non polaire et matériau goudronneux hydrocarboné, avec une certaine part d'alliage organométallique. Après séparation desdites phases, on extrait la phase non polaire via un solvant organique polaire frais, pour constituer une autre phase polaire principalement à alliage organométallique et solvant polaire. L'alliage organométallique peut ensuite être récupéré à partir des phases polaires, par exemple aux fins de distillation.
Hamlin Joseph L.
Jones Karl R.
Lambert Jules A.
Lee John Y.
Albemarle Corporation
Macrae & Co.
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