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    • 2. 发明授权
    • Process for the gas-phase homo- or copolymerization of alpha-olefin with
a pretreated catalyst system
    • α-烯烃与预处理催化剂体系气相均聚或共聚的方法
    • US5179180A
    • 1993-01-12
    • US429025
    • 1989-10-30
    • Antero AhvenainenHannu SalminenJari TervonenTarja Soderberg
    • Antero AhvenainenHannu SalminenJari TervonenTarja Soderberg
    • C08F4/62C08F2/34C08F4/60C08F4/646C08F4/654C08F10/00C08F10/04C08F110/06C08F110/08
    • C08F10/04C08F10/00C08F110/06C08F110/08Y10S526/901Y10S526/904Y10S526/907
    • The polymerization of certain alpha-olefins in a gas phase involves the problem of agglomeration of the product into particles disadvantageous from the viewpoint of its handling. In the present invention this problem has been solved by means of a new type of process for the homo- or copolymerization of alpha-olefins. In the process the catalyst system is pretreated by contacting and reacting a transition-metal compound which is solid or on a solid carrier with an organoaluminum compound, and possibly an electron donor, in a liquid medium, and by drying the thus formed reaction product to produce a solid catalyst system. The thus pretreated solid and active catalyst system is then fed together with an alpha-olefin in the gaseous state into a gas-phase reactor, and polymerization is carried out by contacting them with each other. By feeding a dry and active catalyst system into the gas-phase reactor, it is possible to avoid the agglomeration of the product which occurs in conventional processes in which an organoaluminum compound and possibly an electron donor are fed in a liquid medium into the reactor.
    • 在气相中某些α-烯烃的聚合涉及从其处理的观点来看,不利于产物聚集成颗粒的问题。 在本发明中,这个问题已经通过用于α-烯烃均聚或共聚的新型方法来解决。 在该方法中,催化剂体系通过在液体介质中使固体或固体载体上的过渡金属化合物与有机铝化合物和可能的电子给体接触并使其反应,并将由此形成的反应产物干燥 产生固体催化剂体系。 然后将如此预处理的固体和活性催化剂体系与气态的α-烯烃一起进料到气相反应器中,并通过使它们彼此接触进行聚合。 通过将干燥和活性的催化剂体系进料到气相反应器中,可以避免在有机铝化合物和可能的电子给体在液体介质中进料到反应器中的常规方法中发生的产物的聚集。