A gas phase, two stage process for the production of polypropylene impact copolymer wherein fouling of a second stage recycle loop and heat exchange unit incorporated therein is reduced by the addition to substantially gaseous material passing through the loop of a small amount of an alkylene compound.
一种生产聚
丙烯抗冲共聚物的气相两级工艺,通过在通过循环回路的大部分气态物料中加入少量烯烃化合物,可减少第二级循环回路和其中热交换装置的堵塞。