乙酰丙酮配体对SnCl2/AC催化乙炔氢氯化反应的影响

Effects of Acetylacetone Ligand on Catalytic Performance of SnCl2/AC in Acetylene Hydrochlorination

周维 张健 乔文强 孙玺 秦玉才 宋丽娟

Wei Zhou Jian Zhang Wenqiang Qiao Xi Sun Yucai Qin Lijuan Song

辽宁石油化工大学 辽宁省石油化工催化科学与技术重点实验室，辽宁 抚顺 113001 兰州大学 化学与化工学院，甘肃 兰州 730000

Key Laboratory of Petrochemical Catalytic Science of Liaoning Province，Liaoning Petrochemical University，Fushun Liaoning 113001，China College of Chemistry and Chemical Engineering，Lanzhou University，Lanzhou Gansu 730000，China

负载型SnCl2是一种无汞乙炔氢氯化催化剂，为了增强SnCl2催化剂的乙炔氢氯化反应性能，通过引入乙酰丙酮配体(acetylacetone)制备了5.0%Sn(acac)2Cl2/AC催化剂，并对催化剂的物化性能进行了分析。结果表明，在乙炔体积空速为90 h-1、乙炔与HCl物质的量比为1∶1.1、反应温度为170 ℃的条件下，5.0%Sn(acac)2Cl2/AC催化剂的乙炔转化率达到96%，高于5.0%SnCl2/AC催化剂的乙炔转化率；结合反应前后催化剂的性能表征，证实引入乙酰丙酮配体可增强SnCl2催化剂的乙炔吸附能力，同时还可起到抑制反应过程中锡流失的作用，有效地提高了SnCl2催化剂的反应活性和稳定性。

Supported SnCl2 is a mercury?ree catalyst for acetylene hydrochlorination.5.0%Sn(acac)2Cl2/AC catalyst was prepared by introducing acetylacetone ligand to enhance the catalytic performance of SnCl2 in acetylene hydrochlorination.The results show that the acetylene conversion of 5.0%Sn(acac)2Cl2/AC catalyst is up to 96% under the conditions of acetylene?to?hydrogen chloride molar ratio of 1∶1.1,170 ℃ and GHSV(C2H2) of 90 h-1, which is higher than that of the 5.0%SnCl2/AC catalyst. The physical and chemical properties of the catalysts before and after the reaction also proved that the introduction of acetylacetone ligand can enhance the acetylene adsorption capacity of the SnCl2 catalyst and inhibit Sn loss during the reaction.Therefore,the activity and stability of the SnCl2 catalyst were effectively improved.

国家自然科学基金资助项目(U1662135)

10.3969/j.issn.1006-396X.2022.02.006