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Title:
CATALYST FOR POLYMERIZATION OF OLEFIN AND ITS PREPARATION
Document Type and Number:
Japanese Patent JPH0625349
Kind Code:
A
Abstract:

PURPOSE: To obtain the captioned catalyst having a particle size distribution narrower than that of the catalyst component and of preventing the formation of fine polymer particles by prepolymerizing ethylene or the like in a gas phase or the like using a specified catalyst in the presence of filler powder and, then, removing the filler after the formation of a prepolymer.

CONSTITUTION: The intended catalyst is obtained by, first, prepolymerizing ethylene alone or a mixture of ethylene and 3-8C α-olefins in gas phase or in suspended state in the presence of filler powder such as of polyethylene using a catalyst system comprising a catalyst component consisting of titanium, magnesium, chlorine and, if necessary, an electron donor or an electron acceptor, and a co-catalyst until equal to or less than 20 g of a (co)polymer per 1 g of the catalyst component is produced and, then, removing at least a part of the filler powder after the formation of the prepolymer.


Inventors:
KUROODO BURIYUN
MISHIERU ABUARO
Application Number:
JP1993000093715
Publication Date:
February 01, 1994
Filing Date:
March 29, 1993
Export Citation:
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Assignee:
ATOCHEM ELF SA
International Classes:
C08F4/648; C08F4/60; C08F4/64; C08F10/00; (IPC1-7): C08F10/00; C08F4/648
Domestic Patent References:
JPS52139184A1977-11-19
JPS5964611A1984-04-12
JPS6395208A1988-04-26
JPS5586805A1980-07-01
JPS598706A1984-01-18
JPH01118504A1989-05-11
Attorney, Agent or Firm:
越場 隆



 
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