Abstract: Alkylated gasoline feed of C4 mixture is the excellent gasoline blending component because it is characterized for high octane number, low sulfur and low olefins. The pre-hydrogenation unit of alkylation feedstock is the key part for alkylation process to remove some trace butadiene from the feedstock while mono-olefins are basically prevented from any losses. The Pd-based pre-hydrogenation catalysts for alkylation feedstock developed by PetroChina Lanzhou Petrochemical Research Center have a number of characteristics, such as high hydrogenation activity, high selectivity and high hydrogenation stability. LY-DBiso-03 catalyst is suitable for two-bed hydrogenation process with the hydrogenation rate of butadiene exceeding 99 percent. The 1-butene isomerization is more than 80 percent of the 2-butene isomerization rate. The yield of butene exceeds 99 percent. PDB-02 catalyst is suitable for single-bed hydrogenation process. The butadiene content in hydrogenation products is equal to or lower than 50μg/ g while the mono-olefin yield is equal to or higher than 100 percent.

Key words: butadiene, selective hydrogenation, Pd-based, two-bed, single-bed, LY-DBiso-03, PDB-02

摘要： C4 烷基化汽油具有高辛烷值、低硫、低烯烃的特点, 是理想的汽油调和组分。C4 烷基化原料预加氢装置 是烷基化工艺的关键单元, 其主要作用是脱除原料中的微量杂质丁二烯, 并要求单烯烃基本不损失。中国石油兰州化 工研究中心成功开发的烷基化原料预加氢催化剂以Pd 为活性组分, 具有加氢活性、选择性高、加氢稳定性好的特点。 LY-DBiso -03 催化剂适用于两段床加氢工艺, 丁二烯加氢率超过99%, 1—丁烯异构化为2—丁烯的异构化率80%以上, 丁烯收率99%以上; PDB-02 催化剂适用于单段床加氢工艺, 加氢产品中丁二烯含量≤50μg/ g, 单烯烃收率≥100%。

关键词: 丁二烯; 选择加氢; 钯基; 两段床; 单段床; LY-DBiso -03; PDB-02