Title:
PRODUCTION OF POLYOLEFIN
Document Type and Number:
Japanese Patent JP3189340
Kind Code:
B2
Abstract:
PURPOSE: To produce a polyolefin having a predetermined density by polymerizing an olefin with a comonomer in a polymerization zone in the presence of a catalyst and hydrogen.
CONSTITUTION: The density of a polyolefin obtained by polymerization is measured. The found value and operating condition data K1 to K11 which govern the reaction conditions are inputted into a computer 30, which arithmetically processes all these data to estimate the state of the reaction. Based on the estimate, a change in the density of the polyolefin to be produced in the polymerization vessel is estimated. The amounts in which the operating conditions should be changed are calculated based on a comparison between the estimated density and the desired one, and the operating conditions are changed according to the calculation results (S1 to S4) to thereby produce a polyolefin having a predetermined density. Thus, a polyolefin having a desired density according to a molding method or application therefor can be stably produced without fail.
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Inventors:
Bunnao Watanabe
Morimasa Ogawa
Morinaga Koji
Morimasa Ogawa
Morinaga Koji
Application Number:
JP33060991A
Publication Date:
July 16, 2001
Filing Date:
December 13, 1991
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
C08F2/00; C08F2/01; C08F10/00; (IPC1-7): C08F2/00; C08F2/01; C08F10/00
Attorney, Agent or Firm:
Takeshi Shigeno