EP 1115754 A1 20010718 - OFF-LINE PREACTIVATED CATALYSTS AND PREPOLYMERIZED CATALYSTS
Title (en)
OFF-LINE PREACTIVATED CATALYSTS AND PREPOLYMERIZED CATALYSTS
Title (de)
OFF-LINE VORAKTIVIERTE KATALYSATOREN UND VORPOLYMERISIERTE KATALYSATOREN
Title (fr)
CATALYSEURS PREALABLEMENT ACTIVES HORS CIRCUIT ET CATALYSEURS PREPOLYMERISES
Publication
Application
Priority
- US 9921078 W 19990913
- US 10020498 P 19980914
Abstract (en)
[origin: WO0015673A1] Catalysts that have been preactivated and/or prepolymerized are disclosed whereby a magnesium and titanium-containing procatalyst component is contacted with a co-catalyst and an external electron donor (and optionally with an olefin monomer to prepare a prepolymerized catalyst) prior to polymerization to form a preactivated and/or prepolymerized catalyst. The preactivated and/or prepolymerized catalyst then is separated from the mixture, and dried to form a solid preactivated and/or prepolymerized catalyst. This dried catalyst then can be stored and subsequently shipped to a polymerization site where it can be used in gas phase polymerization. The preactivated and/or prepolymerized catalyst can be used in gas phase polymerization as extremely high activity catalyst, and do not cause a rapid rise in reaction temperature causing overheating, undesirable formation of agglomerates, coagulation of polymer, and ultimately, reactor failure.
IPC 1-7
IPC 8 full level
C08F 4/654 (2006.01); C08F 4/646 (2006.01); C08F 10/00 (2006.01)
CPC (source: EP)
C08F 10/00 (2013.01)
Citation (search report)
See references of WO 0015673A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0015673 A1 20000323; AU 6247699 A 20000403; AU 762010 B2 20030619; BR 9913606 A 20011218; CA 2343930 A1 20000323; EP 1115754 A1 20010718; JP 2002524622 A 20020806
DOCDB simple family (application)
US 9921078 W 19990913; AU 6247699 A 19990913; BR 9913606 A 19990913; CA 2343930 A 19990913; EP 99949645 A 19990913; JP 2000570210 A 19990913