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    • 4. 发明申请
    • CONTINUOUS GAS FLUIDIZED BED POLYMERIZATION PROCESS
    • 连续气体流化床聚合工艺
    • WO2016151097A1
    • 2016-09-29
    • PCT/EP2016/056604
    • 2016-03-24
    • SABIC GLOBAL TECHNOLOGIES B.V.
    • ALTHUKAIR, MohammedASHRI, Abdulrahman
    • C08F2/34C08F2/01B01J8/20B01J19/18
    • B01J8/0015B01J8/1827B01J8/1836B01J8/20B01J19/18B01J2208/00274B01J2208/003B01J2219/00006C08F2/01C08F2/34C08F10/02C08F10/00C08F210/16C08F210/08C08F2500/12
    • The invention relates to a process for the preparation of a polyolefin in a reaction system from one or more α-olefin monomers of which at least one is ethylene or propylene, 5 wherein the reaction system comprises a reactor, a product purge bin, a granular feed bin, wherein the granular feed bin is located downstream of the product purge bin, a recovery unit and an extrusion unit directly coupled to the granular fed bin, wherein the reactor comprises a fluidized bed, an expanded section located at or near the top of the reactor, a distribution plate located at the lower part of the reactor and an 10 inlet for a recycle stream located under the distribution plate, wherein the process comprises a) feeding a polymerization catalyst to the fluidized bed in the area above the distribution plate, b) feeding the one or more α-olefin monomers to the reactor, 15 c) circulating fluids from the top of the reactor to the bottom of the reactor, wherein the circulating fluids are cooled using a heat exchanger, resulting in a cooled recycle stream comprising liquid, and wherein the cooled recycle stream is introduced into the reactor using the inlet for the recycle stream, d) withdrawing a stream comprising the polyolefin and fluids from the reactor and 20 passing said stream into the product purge bin, e) purging the product purge bin with a purge stream comprising a first inert gas, preferably nitrogen and steam such that a stream comprising a purged polyolefin and a stream comprising fluids, wherein the stream comprising the fluids is substantially free of steam, is obtained, 25 f) introducing at least part of the stream comprising the fluids back into the reactor via the recovery unit, g) introducing the stream comprising the purged polyolefin into the granular feed bin and h) contacting a deactivating stream comprising steam with the purged polyolefin in the 30 granular feed bin to obtain a polyolefin that is substantially free of active polymerization catalyst.
    • 本发明涉及一种在反应体系中由一种或多种α-烯烃单体制备聚烯烃的方法,其中至少一种是乙烯或丙烯,其中反应体系包括反应器,产物吹扫槽,颗粒状 进料仓,其中所述颗粒进料仓位于所述产品吹扫箱的下游,回收单元和直接耦合到所述颗粒进料仓的挤出单元,其中所述反应器包括流化床,位于或接近 反应器,位于反应器下部的分配板和位于分配板下方的再循环料流的10个入口,其中该方法包括a)将聚合催化剂供给到分配板上方的流化床中, b)将一种或多种α-烯烃单体进料到反应器中,15c)将反应器顶部的流体循环到反应器的底部,其中循环流体使用 导致包含液体的冷却循环流,并且其中将冷却的再循环流引入反应器中,使用再循环流的入口,d)将包含聚烯烃的流和反应器中的流体排出,并将20通过所述流 产品净化箱,e)用包括第一惰性气体,优选氮气和蒸汽的吹扫流吹扫产物吹扫槽,使得包含吹扫的聚烯烃和包含流体的流的流,其中包含流体的流基本上不含 25 f)将包含流体的至少一部分流体经由回收单元引入反应器,g)将包含被吹扫的聚烯烃的流引入到颗粒进料仓中,并且h)使包含蒸汽的去活化流 将清洗的聚烯烃在30粒料进料仓中,得到基本上不含活性聚合催化​​剂的聚烯烃。