Abstract: The development of conventional ethylene recovery technology is briefly discussed. Little advancement has been made in the Front-end Demethanizer Technology since binary and ternary refrigeration are commercialized. As the advanced recovery technology and low energy consumption technology are utilized，the Front-end Depropanizer Technology has made great progress. Nearly no progress in the process of the Front-end Deethanizer technology is reported. The domestic development of ethylene recovery technologies in China is also presented. New technologies，such as 800 kt/a ethylene plant based on the Front-end Depropanizer Technology and 1000 kt/a ethylene plant based on both senquencing separation and progressive separation are successfully developed after 30 years of hard work and research. The general performance of such technologies is reviewed and analyzed. Domestic manufacture and scale-up of major pieces of equipment，such as three compressors and cold box are realized. These pieces of heavy equipment are now running smoothly in 1000 kt/a ethylene plants and reach the advanced standards of imported equipment.

Key words: ethylene, recovery, technology development, major equipments, localization

摘要： 简要介绍乙烯装置经典的分离工艺技术进展，对近年推广应用的新工艺进行了简要分析，结果表明，顺序分离技术主流程变化不大，制冷技术先后推出了二元制冷和三元制冷；前脱丙烷分离技术主流程变化较大，先后推出了先进的回收技术、适用于低压激冷低压脱甲烷工艺的全新流程组合和低能耗乙烯技术；前脱乙烷流程主流程变化不大，也没有太多的新技术推出。然后回顾了乙烯分离工艺技术国产化研究开发的思路及历程，通过近三十年的探索与攻关，先后成功开发了基于前脱丙烷的80万吨/年低能耗乙烯技术和基于顺序“渐近”的100万吨/年先进的乙烯回收工艺技术，分析评价了国产化技术的整体水平，总体技术水平已经达到国际领先水平。最后介绍了乙烯装置分离重大装备国产化的历程及业绩，通过攻关，先后实现了“三机”的生产制造国产化及大型化，冷箱的生产制造也实现了国产化并逐步大型化，配置国产化“三机”和冷箱的百万吨级乙烯装置在正常运行，技术指标达到引进装备先进水平。

关键词: 乙烯, 分离, 技术开发, 重大装备, 国产化