生产这种不饱和烃类最重要的路线是靠蒸汽裂解，主要以石油气体和石脑油作原料。
The most important route to produce these unsaturated hydrocarbons is by steam cracking, using principally petroleum gases or naphtha as feedstock.
文中列举了裂解原料与稀释蒸汽中主要杂质的允许值及其危害，并给出了具体的控制手段。
This paper illustrates the allowance and hazard of the main impurities in cracking feedstock and diluting steam, and provides specific control methods.
在裂解原料或稀释蒸汽中添加结焦抑制剂是目前延长装置运转周期较为有效的方法之一。
Adding coking inhibitor to the dilute steam or cracked raw materials is one of the effective methods to lengthen unit-operating cycle at present.
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