Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1992-04-13
1995-02-07
Pal, Asok
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502117, 502118, 502122, 502152, 502155, 502103, B01J 3100
Patent
active
053875680
ABSTRACT:
This invention uses a new method of producing ionic metallocene compounds. These compounds are useful as catalysts for polymerization of olefins, primarily propylene. This method uses an ionizing agent which ionizes the neutral metallocene compound. The ionizing ionic compound does not contain an active proton and contains a carbonium, oxonium or sulfonium cation. The anion of the ionizing ionic compound is not coordinated or is only loosely coordinated to the metallocene cation and is chemically unreactive with the metallocene cation. Examples of such compounds are triphenylcarbenium tetrakis(pentafluorophenyl)boronate, triphenylcarbenium tris(pentafluorophenyl)phenyl boronate and triphenylcarbeniumtris(pentafluorophenyl)4-trimethylsilyl-2,3,5,6-tetraflu orophenylboronate.
The process of making catalysts with this invention produces catalysts having high activity and does not produce by-products which can inhibit catalyst activity. This new synthesis is a clean reaction which does not produce a Lewis base. The process generates active catalysts by removing a methyl anion from a group IVB metallocene derivative.
REFERENCES:
patent: 4701432 (1987-10-01), Welborn
patent: 4752597 (1988-06-01), Turner
patent: 4794096 (1988-12-01), Ewen
patent: 4799180 (1988-12-01), Turner
patent: 4808561 (1989-02-01), Welborn
patent: 4841004 (1989-06-01), Kaminsky
patent: 4849487 (1989-07-01), Kaminsky
patent: 4871705 (1989-10-01), Hoel
patent: 4892851 (1990-01-01), Ewen
patent: 5036034 (1991-07-01), Ewen
patent: 5198401 (1993-03-01), Turner et al.
Synthesis and Insertion Reactions of Cationic Alkyl bis(cyclopentadienyl) titanium Complexes-Bochman et al, J. Chem. Soc. Chem. Commun. pp. 1610-1611 (1986).
Cationic Alkyl bis(cyclopentadienyl) titanium Complexes. Synthesis, Reactions with CO and t-BuNC and the structure of [Cp.sub.2 TI(n.sup.2 -C(Me)N-t-Bu) (CN-t-Bu)BPh.sub.4 MeCN Bochman et al, Organometallics: pp. 2556-2563 (1987).
Ionic, Base-Free Zirconium Catalysts for Ethylene Polymerization-Hlatky et al J. Am. Chem. Soc. Vol. III, pp. 2728-2729 (1989).
Ethylene Polymerization by a Cationic Dicyclopentadienylzirconium (IV) Alkyl Complex-Jordan et al, J. Am. Chem. Soc., vol. 108, pp. 7410-7411 (1986).
Reactive Cationic Dicyclopentadienylzirconium (IV) Complexes-Jordan et al J. Am. Chem. Soc., vol. 108, pp. 1718-1719 (1986).
Elder Michael J.
Ewen John A.
Cheairs M. Norwood
Fina Technology, Inc.
Pal Asok
Wheelington Jim D.
LandOfFree
Preparation of metallocene catalysts for polymerization of olefi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Preparation of metallocene catalysts for polymerization of olefi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of metallocene catalysts for polymerization of olefi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1110310