然而，聚乙烯的现代气相聚合工艺则表现出相反的趋势。
However, the modern gas-phase process for polyethylene appears to represent an opposite trend.
本发明还涉及基于铬的催化剂在乙烯的气相聚合中的用途。
The invention also relates to the use of a chromium-based catalyst in a gas-phase polymerisation of ethylene.
本文对卧式双轴气相聚合搅拌床反应器的混合特性进行了实验研究。
The study on mixing characteristics in a horizontal stirred bed reactor with double parallel axes was carried out.
比较了经预聚合与不经预聚合催化剂气相聚合与淤浆聚合动力学行为及聚合反应结果。
The kinetic behaviors and the polymerization results of the gas - phase and slurry polymerization of ethylene with the prepolymerized catalyst and original catalyst have been compared.
汽油分馏塔设计中的主要难题是如何从工艺及结构上解决气相聚合物和焦化物对填料和气液分布器的堵塞问题。
The main problem in design of gasoline fractionator is how to prevent blocking of gas phase polymer and coke pellets in packing and gas distributor.
汽油分馏塔设计中的主要难题是如何从工艺及结构上解决气相聚合物和焦化物对填料和气液分布器的堵塞问题。
The main problem in design of gasoline fractionator is how to prevent blocking of gas phase polymer and coke pellets in packing and gas distributor.
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