Verfahren zum Trocknen eines Dampfphasenreaktionsystem

In the polymerization of olefins using a catalyst comprising an organoaluminum compound and a 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 pol...

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Main Authors YAMAGUCHI, YOSHIHISA, KAWASAKI-SHI, KANAGAWA 211, JP, YOSHIKAWA, MAMORU, KAWASAKI-SHI, KANAGAWA 210, JP, NIWA, MASAHIRO, YOKOHAMA-SHI, KANAGAWA 233, JP, SUGA, SHINJIRO, KAWASAKI-SHI, KANAGAWA 211, JP
Format Patent
LanguageGerman
Published 19.11.1998
Edition6
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:In the polymerization of olefins using a catalyst comprising an organoaluminum compound and a 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): A=k.V<2/3> (I> wherein A is the feed quantity (mol) of the organoaluminum compound, k is a coefficient (mol/m ) in the range from 0.15 to 4, and V is the volume (m ) of the whole system including gas circulation pipings.
Bibliography:Application Number: DE19936017388T