Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing
Patent
1995-12-11
1997-10-21
Shaver, Paul F.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heavy metal containing
556 43, 556143, 534 11, 534 15, C07F 708, C07F 1700, C07F 1702
Patent
active
056798148
ABSTRACT:
Metallocenes, such as silicon bridged ansa-metallocenes, are purified by heating a slurry of the metallocene at elevated temperature in an aprotic, polar solvent so as to extract impurities from the metallocene into the solvent and then separating the impurity containing solvent from the metallocene.
REFERENCES:
patent: 4528408 (1985-07-01), Plummer
patent: 4794096 (1988-12-01), Ewen
patent: 4892851 (1990-01-01), Ewen et al.
patent: 4931417 (1990-06-01), Miya et al.
patent: 5017714 (1991-05-01), Welborn, Jr.
patent: 5036034 (1991-07-01), Ewen
patent: 5075467 (1991-12-01), Desobry
patent: 5103030 (1992-04-01), Rohrmann et al.
patent: 5120867 (1992-06-01), Welborn, Jr.
patent: 5145819 (1992-09-01), Winter et al.
patent: 5276208 (1994-01-01), Winter et al.
patent: 5296434 (1994-03-01), Karl et al.
patent: 5314973 (1994-05-01), Welborn, Jr.
patent: 5324800 (1994-06-01), Welborn, Jr. et al.
patent: 5329033 (1994-07-01), Spaleck et al.
patent: 5340701 (1994-08-01), Desobry
patent: 5441920 (1995-08-01), Welborn, Jr.
patent: 5455365 (1995-10-01), Winter et al.
patent: 5455366 (1995-10-01), Rohrmann et al.
patent: 5512693 (1996-04-01), Rosen et al.
patent: 5523435 (1996-06-01), Lisowsky
patent: 5532396 (1996-07-01), Winter
patent: 5541350 (1996-07-01), Murata et al.
patent: 5556997 (1996-09-01), Strickler et al.
patent: 5569746 (1996-10-01), Lee et al.
patent: 5585508 (1996-12-01), Kuber et al.
Ray and Westland: "The Infrared Spectra of Some Compounds of Zirconium(IV) and Hafnium(IV) Tetrahalides and Ligands Containing Group V Donor Atoms"; inorganic Chemistry, vol. 4, No. 10, Oct. 1965, pp. 1501-1504.
Spaleck, et al., The Influence of Aromatic Substituents on the Polymerization Behavior of Bridged Zirconocene Catalysts; Organometallics, vol. 13, No. 3, 1994, pp. 954-963.
Spaleck, et al., "High Molecular Weight Polypropylene through Specifically Designed Zirconocene Catalysts"; Angew Chem. Int. Ed. Engl, 1992, vol. 31, No. 10, pp. 1347-1350.
Jordan, et al., "Synthesis and Structures of Neutral and Cationic rac-(Ethylenebis(tetrahydroindenyl)) zirconium(IV) Benzyl Complexes"; Organometallics, vol. 9, No. 5, 1990, pp. 1539-1545.
Samuel et al; ".pi.-Cyclopentadienyl and .pi.-Indenyl Compounds of Titanium, Zirconium, and Hafnium Containing .sigma.-Bonded Organic Substituents"; Journal of the American Chemical Society, 1973, 95:19; pp. 6263-6267.
The Metallocene Monitor, Special Feature; Exxon, Hoechst, and BASF All Have Parts of Metallocene-Catalyzed Isotactic PP; pp. 4-10; (undated).
Stehling, et al., "ansa-Zirconocene Polymerization Catalysts with Annelated Ring Ligands-Effects on Catalytic Activity and Polymer Chain Length" Organometallics, 1994 vol. 13, No. 3, pp. 964-970.
Power John M.
Strickler Jamie R.
Albemarle Corporation
Pippenger Philip M.
Shaver Paul F.
LandOfFree
Purification of metallocenes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Purification of metallocenes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Purification of metallocenes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1007849