Abstract: Selective hydrogenation for acetylene removal holds the key to preparation of polymer-graded ethylene. LY-C2 -02 catalyst is used in the ethylene plant of sequential separation process in the petrochemical industry. C2 fraction from deethanate column is fed into the hydrogenation unit after measured hydro-treatment. Acetylene is hydrogenated under action of the catalyst to be turned into ethylene, thus removing acetylene completely from C2 fraction. Prevention of ethylene hydrogenation is the key link in the C2 selective hydrogenation process, because ethylene from hydrogenation of acetylene is likely to be turned into acetylene again after hydrogenation. LY-C2 -02 catalyst is an integration of various technologies and adopts a multi-stage distributed pore structure with the characteristics of high activity and good selectivity. Selectivity of LY-C2 -02 catalyst is improved by 20 percent as compared to the traditional catalysts. The general performance reaches the world advanced level, with the indexes of selectivity leading the catalysts of the same kind. It has been used in the ethylene plants of post hydrotreating process at Lanzhou Petrochemical Company, Liaoyang Petrochemical Company and Daqing Petrochemical Company and achieved remarkable economic results with a great application value.

Key words: ethylene, acetylene, selective hydrogenation, selectivity, catalyst

摘要： 选择性加氢脱除乙炔, 是制备聚合级乙烯的关键。LY-C2 -02 催化剂应用于石油化工领域采用顺序分离流 程的乙烯装置。来自脱乙烷塔顶的C2 馏分, 经过计量配氢后, 进入C2 加氢反应器, 乙炔在催化剂的作用下加氢生成 乙烯, 从而完全脱除C2 馏分中的乙炔。由于乙炔加氢后生成的乙烯有可能再次加氢生成乙烷, 因此避免乙烯的加氢成 为C2 选择性加氢过程的关键环节。LY-C2 -02 催化剂集成多项专利技术, 采用多级分布的孔结构, 活性中心合金化程 度高, 具有活性高、选择性优异等特点, 与传统催化剂相比选择性提高了20%, 总体性能达到国际先进水平, 其中选 择性指标领先于同类催化剂。在兰州石化、辽阳石化、大庆石化等公司后加氢流程的乙烯装置使用后产生显著经济效 益, 具有突出的推广应用价值。

关键词: 乙烯; 乙炔; 选择加氢; 选择性; 催化剂