液体脱硫醇催化剂的性能评价

以氯磺酸与酞菁钴为原料合成多磺化酞菁钴,制得活性组分含量为23.8%(w)的液体脱硫醇催化剂(Cat.A)。采用硫含量、动态光散射及电位滴定等方法考察了Cat.A的结构、粒径分布及催化氧化性能,并与进口和国产液体脱硫醇催化剂进行比较。实验结果表明,Cat.A的磺化酞菁钴中平均磺酸取代基个数为3.4;Cat.A在碱液中具有较好的分散性、溶解性和较高的稳定性;在Cat.A质量浓度为100μg/g、Cat.A用量3 mL、汽油(混合硫醇硫含量为255μg/g)体积30 mL、反应温度30℃、反应时间30 min的条件下,Cat.A对汽油中硫醇的脱除率达90%,其脱硫醇活性与进口液体脱硫醇催化剂的活性相当。

Performance Evaluation of Liquid Catalysts for Removal of Mercaptan

Multi-sulfonated cobalt phthalocyanine was synthesized by the reaction of cobalt phthalocynine with chlorosulfonic acid,and then a liquid catalyst(Cat.A) with 23.8%(w) of the multi-sulfonated cobalt phthalocyanine as the active component for the removal of mercaptans from gasoline was prepared by dissolving the active component in sodium hydroxide solution with a stabilizer and an antifreezer.Cat.A was characterized by sulfur content analysis,dynamic light scattering analysis and potentiometric titration to investigate its structure,size distribution and catalytic activity,and compared with imported and domestic liquid desulfurization catalysts.The experimental results show that the average sulfonic group number in the every multi-sulfonated cobalt phthalocyanine molecule in Cat.A is 3.4.The active component in the alkali solution has good dispersity,solubility and stability.The removal rate of the mercaptans in gasoline could reach 90% using Cat.A under the conditions of the catalyst mass concentration 100 μg/g,the catalyst dosage 3 mL,gasoline with 255 μg/g of mercaptan sulfur mass concentration 30 mL,reaction temperature 30 ℃ and reaction time 30 min.