A decade ago most ethylene in North America was made using naphtha, an oil derivative: it is this process that has propylene as its by-product.
十年前，北美的大多数乙烯是石油脑(一种石油衍生物)所制：其生产过程所产生的副产物正是丙烯。
Ethanolamines are commonly made by the method of reacting aqueous ammonia and ethylene oxide. Product profile, product quality and energy consumption are three key factors in ethanolamine process.
环氧乙烷氨解法是目前生产乙醇胺的主要方法，产品比例、产品质量及能耗是乙醇胺生产中的三个关键因素。
Dicyclopentadiene (DCPD) mostly comes from the C5 fraction of by-product which is produced in the process of preparation of ethylene by petroleum cracking and by-product of the coal-coking process.
双环戊二烯主要来自石油裂解制乙烯副产物的C5馏分和煤炭焦化副产物。
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