A large amount of C5 fraction is generated in the ethylene production process with petroleum hydrocarbon cracking.
在石油烃类裂解制取乙烯的过程中，有大量的C5馏分产生。
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。
The new catalyst for producing more diesel as well as the new process of component-selective cracking with staged feeding developed by Research Institute of Petroleum Processing were introduced.
介绍了石油化工科学研究院新近开发的增产柴油催化剂及分段进料的组分选择性裂化的新工艺；
A new process for producing roofing asphalt from petroleum residua by steam cracking and condensation has been studied in the laboratory.
在实验室中研究了一种从石油残渣油制取建筑沥青的新工艺——水蒸汽裂解缩合。
The double lift pipe catalytic cracking process and apparatus for modifying inferior petrol in petroleum processing aims at reducing the olefin content and sulfur content in petrol greatly.
本发明公开了石油加工过程的一种改质劣质汽油的双提升管催化裂化方法 及装置，主要用于解决采用现有技术所生产的汽油烯烃含量或硫含量下降幅度 不大的问题。
The double lift pipe catalytic cracking process and apparatus for modifying inferior petrol in petroleum processing aims at reducing the olefin content and sulfur content in petrol greatly.
本发明公开了石油加工过程的一种改质劣质汽油的双提升管催化裂化方法 及装置，主要用于解决采用现有技术所生产的汽油烯烃含量或硫含量下降幅度 不大的问题。
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