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    • 89. 发明申请
    • MULTISTAGE PROCESS FOR THE POLYMERIZATION OF OLEFINS
    • 烯烃聚合的多步法
    • WO2014184152A2
    • 2014-11-20
    • PCT/EP2014/059680
    • 2014-05-13
    • BASELL POLYOLEFINE GMBH
    • PENZO, GiuseppeMEI, GabrieleMEIER, GerhardusSCHUELLER, UlfCIARROCCHI, Antonio
    • C08F210/00
    • C08F110/02B01J8/0025B01J8/1863B01J8/1872B01J8/26B01J19/245B01J2208/00274B01J2208/00292B01J2208/00557B01J2208/00752B01J2208/00761B01J2208/00769B01J2208/00991B01J2219/24C08F10/00C08F2/001C08F2/34C08F2/01C08F2500/12C08F2500/07C08F2500/24C08F2500/18
    • A process for polymerizing olefins at temperatures of from 30°C to 140°C and pressures of from 1.0 MPa to 10 MPa in the presence of a polymerization catalyst in a multistage polymerization of olefins in at least two serially connected gas-phase polymerization reactors, the process for transferring polyolefin particles from a first gas-phase polymerization reactor to a second gas-phase polymerization reactor comprising the steps of a) discharging polyolefin particles from the first gas-phase polymerization reactor into a separation chamber in which the polyolefin particles are separated from concomitantly discharged reaction gas, the separation chamber being at a lower pressure than the pressure in the first gas-phase polymerization reactor; b) transferring the polyolefin particles within the separation chamber into a lower part of the separation chamber which contains a bed of polyolefin particles which moves from top to bottom of this part of the separation chamber and into which a fluid is introduced in an amount that an upward stream of the fluid in the bed of polyolefin particles above the fluid introduction point is induced, c) withdrawing polyolefin particles from the lower end of said lower part and transferring them to one of at least two lock hoppers working intermittently in parallel; and d) simultaneously pressurizing another of the at least two lock hoppers working intermittently by means of a gas comprising reaction gas coming from the second gas-phase polymerization reactor, and apparatus for the multistage polymerization of olefins, comprising at least two serially connected gas-phase polymerization reactors and a device for transferring polyolefin particles from an up-stream gas-phase polymerization reactor to a downstream gas-phase polymerization reactor, the transferring device comprising - a gas/solid separation chamber placed downstream of the upstream gas-phase polymerization which gas/solid separation chamber is equipped at a lower part with an inlet for introducing a fluid, and - connected to the gas/solid separation chamber at least two lock hoppers, placed in a parallel arrangement, each connected to the downstream gas-phase polymerization reactor.
    • 在聚合催化剂的存在下,在烯烃的多级聚合中,在30℃至140℃的温度和1.0MPa至10MPa的压力下,烯烃在至少两个 串联连接的气相聚合反应器中,将聚烯烃颗粒从第一气相聚合反应器转移到第二气相聚合反应器的方法包括以下步骤:a)将聚烯烃颗粒从第一气相聚合反应器排出到分离器 其中聚烯烃颗粒与同时排出的反应气体分离,分离室的压力低于第一气相聚合反应器中的压力; b)将分离室内的聚烯烃颗粒转移到分离室的下部,该分离室包含聚烯烃颗粒床,所述聚烯烃颗粒床从该分离室的该部分的顶部移动到底部并且以这样的量引入流体, 诱导在流体引入点之上的聚烯烃颗粒床中的流体的向上流,c)从所述下部的下端抽出聚烯烃颗粒,并将它们传送到并行间歇工作的至少两个闭锁料斗中的一个; 和d)同时通过包含来自第二气相聚合反应器的反应气体的气体对间歇工作的至少两个闭锁料斗中的另一个进行加压,以及用于烯烃多级聚合的设备,其包括至少两个串联连接的气 - 以及用于将聚烯烃颗粒从上游气相聚合反应器转移到下游气相聚合反应器的装置,所述转移装置包括: - 位于上游气相聚合反应器下游的气/固分离室,其中 气体/固体分离室在下部装备有用于引入流体的入口,并且 - 与气体/固体分离室连接至少两个平行布置的锁定料斗,每个锁定料斗均连接到下游气相聚合 反应器中。