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；
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