C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 2/34 (2006.01) C08F 10/00 (2006.01)
Patent
CA 2112507
ABSTRACT OF THE DISCLOSURE In the polymerization of olefins using a catalyst comprising an organoaluminum compound and a solid catalyst components containing titanium and/or vanadium; and magnesi- ?m in a vapor phase fluidized bed, the formation of sheet- like polymer and other abnormal conditions in the initial stage of the polymerization are avoided by means of previous drying of the reactor by feeding an organoaluminum compound prior to the feeding of seed polymer, the quantity of said organoaluminum compound being calculated by the following equation (I): A=k'V2/3 ......... (I) wherein A is the feed quantity (mol) of the organoaluminum compound, k is a coefficient (mol/m2) in the range from 0.15 to 4, and V is the volume (m3) of the whole system including gas circulation pipings.
Niwa Masahiro
Suga Shinjiro
Yamaguchi Yoshihisa
Yoshikawa Mamoru
Gowling Lafleur Henderson Llp
Nippon Petrochemicals Company Limited
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