Verfahren zur Verbesserung der Effektivität eines vorpolymerisierten Katalysators.
摘要
The invention provides a process for pre-polymerizing olefin polymerization catalysts and a process for increasing the efficiency of pre-polymerized olefin polymerization catalysts. In one process of this invention an olefin monomer is added to a fluid carrier stream containing an olefin polymerization catalyst. The carrier stream containing the monomer and the catalyst is passed through an elongated tubular reactor at a flow rate sufficient to provide a residence time in the tubular reactor of less than 1 minute and under temperature conditions to pre-polymerize the catalyst within the tubular reactor without plugging of the reactor. In another process of this invention a pre-polymerized catalyst is contacted with a cocatalyst or a mixture of cocatalyst and an electron donor prior to introducing the catalyst into a polymerization reaction zone.
申请公布号
DE3789500(D1)
申请公布日期
1994.05.05
申请号
DE19873789500
申请日期
1987.09.21
申请人
FINA TECHNOLOGY, INC., DALLAS, TEX., US
发明人
EWEN, JOHN A., HOUSTON TEXAS 77058, US;BITZER, ALAN H., HOUSTON TEXAS 77062, US;GRESSETT, DAVID L., GALENA PARK TEXAS 77547, US;HUMMEL, HERBERT G., PASADENA TEXAS 77503, US