Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1995-08-10
1997-07-15
Caldarola, Glenn A.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502119, 502120, 502 24, 502515, C08F 464, B01J 3138
Patent
active
056483082
ABSTRACT:
Inorganic and organic impurities are removed from a metallocene catalyst compound comprising the steps of (a) separating inorganic impurities from said compound by forming a solution of said compound in an organic solvent medium which is substantially a non-solvent for said inorganic impurities, (b) treating the solution of said compound with a particulate absorbing material so as to absorb and remove organic impurities from said solution, and (c) separating the solid material, including said particulate absorbing material, from said solution. Optionally, water can be removed by adding a drying agent.
REFERENCES:
patent: 4892851 (1990-01-01), Ewen et al.
patent: 5075467 (1991-12-01), Desobry
patent: 5268495 (1993-12-01), Riepl et al.
patent: 5340701 (1994-08-01), Desobry
patent: 5349100 (1994-09-01), Mintz
patent: 5455366 (1995-10-01), Rohrmann et al.
Grossman, R. B., et al., "Syntheses of [Ethylene-1,2-bis( .eta..sup.6 -4,5,6,7,-tetrahydro-1-indenyl)]zirconium and -hafnium Hydride Complexes. Improved Syntheses of the Corresponding Dichlorides, Organometallics", vol. 10, No. 5, pp. 1501-1505, (1991).
Bajgur, et al., "Synthesis, Structural Characterization, and Electrochemistry of [1]Metallocenophane Complexes, [Si(alkyl).sub.2 (C.sub.5 H.sub.4).sub.2 ]MCI.sub.2, M=Ti, Zr", Inorg. Chem., vol. 24, No. 16, pp. 2539-2546, (1985).
Wild, et al., "Synthesis and Molecular Structures of Chiral ansa-Titanocene Derivatives with Bridged Tetrahydroindenyl Ligands", J. Organometallic Chemistry, 232, pp. 233-247, (1982).
Summers, et al., Diaryl Bis-(cyclopentadienyl)-titanium Compounds.sup.1, JACS, vol. 77, pp. 3604-3606, (1955).
Diefenbach Steven P.
Lee John Y.
Albemarle Corporation
Caldarola Glenn A.
Pippenger Philip M.
Yildlrim Bekir L.
LandOfFree
Process for upgrading metallocene catalysts does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for upgrading metallocene catalysts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for upgrading metallocene catalysts will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1492204