Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1988-08-23
1990-05-01
Garvin, Patrick P.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502103, 502108, 502109, 502117, 502120, C08F 464
Patent
active
049218255
DESCRIPTION:
BRIEF SUMMARY
TECHNOLOGICAL FIELD
This invention relates to a solid catalyst for polymerization of olefins, and processes for its production. More specifically, it relates to a solid catalyst for polymerization of olefins comprising a particulate carrier, a compound of a transition metal of Group IVB of the periodic table and an aluminoxane as catalyst components, and processes for its production.
BACKGROUND TECHNOLOGY
For production of an alpha-olefin polymer, especially an ethylene homopolymer or an ethylene/alphaolefin copolymer, a method has heretofore been known to polymerize ethylene or copolymerizing ethylene with an alpha-olefin in the presence of a titanium-containing catalyst comprising a titanium compound and an organoaluminum compound or a vanadium-containing catalyst comprising a vanadium compound and an organoaluminum compound.
Catalyst comprising zirconium compounds and aluminoxanes have recently been proposed as a new Zieglertype olefin polymerization catalyst.
Japanese Laid-Open Patent Publication No. 19309/1983 describes a process for polymerizing ethylene and at least one C.sub.3 -C.sub.12 alpha-olefin in the presence of a catalyst composed of a transition metal-containing compound represented by the following formula transition metal and Hal is halogen, and a linear aluminoxane represented by the following formula aluminoxane represented by the following formula ##STR1## in which R and n are as defined above, at a temperature of -50.degree. C. to 200.degree. C.
Japanese Laid-Open Patent Publication No. 95292/1984 describes an invention relating to a process for producing a linear aluminoxane represented by the following formula ##STR2## in which n is 2 to 40, and R is C.sub.1 -C.sub.6, and a cyclic aluminoxane represented by the following formula ##STR3## in which n and R are as defined. This patent publication discloses a specific example in which methylaluminoxane, for example, produced by the process of this patent publication is mixed with a bis(cyclopentadienyl) compound of titanium or zirconium, and an olefin is polymerized in the presence of the mixture.
Japanese Laid-Open Patent Publication No. 35005/1985 discloses a process for producing an olefin polymerization catalyst, which comprises reacting an aluminoxane represented by the following formula ##STR4## in which R is C.sub.1 -C.sub.10 alkyl, and R.sup.o is R.sup.1 or is bonded to represent --O--, with a magnesium compound, chlorinating the reaction product, and treating the chlorinated product with a compound of Ti, V, Zr or Cr. This patent publication describes that the above catalyst is especially suitable for copolymerization of a mixture of ethylene with a C.sub.3 -C.sub.12 alpha-olefin.
Japanese Laid-Open Patent Publication No. 35006/1985 discloses a combination of (a) a mono-, di- or tri-cyclopentadienyl compound of two or more different transition metals or its derivative and (b) an alumoxane (aluminoxane) as a catalyst system for production of a reactor blended polymer.
Japanese Laid-Open Patent Publication No. 35007/1985 describes a process for polymerizing ethylene alone or together with an alpha-olefin having at least 3 carbon atoms in the presence of a catalyst system comprising a metallocene and a cyclic aluminoxane represented by the following formula ##STR5## in which R is an alkyl group having 1 to 5 carbon atoms, and n is an integer of 1 to about 20, or a linear alumoxane represented by the following formula ##STR6## in which R and n are as defined above.
Japanese Laid-Open Patent Publication No. 35008/1985 discloses that by using a catalyst system containing at least two metallocenes and an alumoxane, polyethylene or an ethylene/C.sub.3 -C.sub.10 alpha-olefin copolymer having a broad molecular weight distribution is produced.
The catalysts formed from transition metal compounds and aluminoxanes as proposed in these prior art references have much higher polymerization activity than catalyst systems formed from transition metal compounds and organoaluminum compounds known heretofore. But these catalyst systems are solu
REFERENCES:
patent: 4530914 (1985-07-01), Ewen et al.
patent: 4701432 (1987-10-01), Welborn
patent: 4752597 (1988-06-01), Turner
patent: 4794096 (1988-12-01), Ewen
patent: 4808561 (1989-02-01), Welborn
Kashiwa Norio
Kioka Mamoru
Garvin Patrick P.
Mitsui Petrochemical Industries Ltd.
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