Process for reducing the concentration of by-products in product

Details Process for reducing the concentration of by-products in product Process for reducing the concentration of by-products in product

1996-12-18

1998-06-23

Nazario-Gonzalez, Porfirio

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

556 12, 556 43, 556 47, 556 53, 526160, 526943, 502103, C07F 1700, C07F 702

Patent

active

057707529

ABSTRACT:
The present invention relates to a process for reducing the concentration of organometallic and/or inorganic by-products in product mixtures formed in the synthesis of metallocenes, which comprises treating a mixture comprising one or more metallocenes and one or more organometallic and/or inorganic by-products with a polar extractant.

REFERENCES:
patent: 4752597 (1988-06-01), Turner
patent: 5017714 (1991-05-01), Welborn, Jr.
patent: 5103030 (1992-04-01), Rohrmann et al.
patent: 5278264 (1994-01-01), Spaleck et al.
patent: 5324800 (1994-06-01), Welborn, Jr. et al.
patent: 5455366 (1995-10-01), Rohrmann et al.
patent: 5556997 (1996-09-01), Strickler et al.
Hans-Herbert Brintzinger et al, "Stereospezifische Olefinpolymerisation mit chirlan Metallcocenkatalysatoren", Angew. Chem, 1995, 107, pp. 1255-1283.
Hans H. Brintzinger et al, "Stereospecific Olefin Polymerization with Chiral Metallocene Catalysts", Angew. Chem. Int. Ed. Engl., 34 (1995) pp. 1143-1170.
H. G. Alt et al, "Verbruckte Bis(fluorenyl)komplexe des Zirconiums und Hafniums . . . ", J. Organomet. Chem., 472 (1994), pp. 113-118.

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