Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in reactor of specified material – or in reactor...
Patent
1993-12-28
1996-07-30
Weber, Thomas R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymerizing in reactor of specified material, or in reactor...
526348, 526901, C08F 234
Patent
active
055412696
ABSTRACT:
In the polymerization of olefins using a catalyst comprising an organoaluminum compound and solid catalyst components containing titanium and/or vanadium; and magnesium 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):
REFERENCES:
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patent: 4326048 (1982-04-01), Stevens et al.
patent: 4532311 (1985-07-01), Fulks et al.
patent: 5077358 (1991-12-01), Durand et al.
Niwa Masahiro
Suga Shinjiro
Yamaguchi Yoshihisa
Yoshikawa Mamoru
Nippon Petrochemicals Company Limited
Weber Thomas R.
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