Due to the limitation of the traditional pickling process, the sulfur content of coking benzene is high, and its market competitiveness is difficult to match that of petroleum benzene.

由于传统酸洗精制工艺的限制，焦化纯苯的含硫量高，其市场竞争力难以与石油苯相匹敌。

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The removal of petroleum coke from equipment such as coking drums. Hydraulic decoking uses high-velocity water stream as the cutting means.

从像焦化塔那样的设备中除去石油焦。液压除焦用高速水流作为切削手段。

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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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