铜锌催化剂的制备及炔醛化反应合成1,4-丁炔二醇  

Preparation of Cu-Zn catalysts for ethynylation of formaldehyde to 1,4-butynediol

作　　者：杨林雪 杨桂花[1,2] 王吉德 李天翼[1] YANG Linxue;YANG Guihua;WANG Jide;LI Tianyi(Key Laboratory of Oil and Gas Fine Chemicals,Ministry of Education and Xinjiang Uyghur Autonomous Region,College of Chemical Engineering,Xinjiang University,Urumqi 830017,China;State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]新疆大学化工学院,石油天然气精细化工教育部暨自治区重点实验室,新疆乌鲁木齐830017 [2]大连理工大学精细化工国家重点实验室,辽宁大连116024

出　　处：《高校化学工程学报》2023年第6期936-942,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：新疆维吾尔自治区自然科学基金(2023D01C08);大连理工大学精细化工国家重点实验室开放课题基金(KF 2103);新疆大学2022年校级大学生创新训练计划(XJU-SRT-22019)。

摘　　要：为探究铜锌催化剂结构对炔醛化反应合成1,4-丁炔二醇的影响,采用共沉淀法制备一系列铜锌催化剂,考察铜锌催化剂的焙烧温度、铜锌物质的量比、制备过程中沉淀剂的滴加方式等对催化剂结构及其对炔醛化反应的影响。结果表明,当铜锌物质的量比为2:1、采取沉淀剂正加方式、焙烧温度为450℃时制备的铜锌催化剂,体现最好的炔醛化反应活性。添加锌助剂后,铜锌催化剂中CuO颗粒尺寸减小、分散性增加,铜锌之间存在电子协同作用和氧空位是铜锌催化剂炔醛化活性与稳定性较高的主要原因。而铜化合物被过度还原为金属铜,影响催化剂活性与稳定性。A series of Cu-Zn catalysts were prepared by a co-precipitation method to study the effect of Cu-Zn catalysts structure on ethynylation performance in 1,4-butynediol synthesis.The influences of Cu/Zn molar ratio,addition mode of precipitator and calcination temperature in the preparation process of Cu-Zn catalysts on the performance of the catalysts were investigated.The results showed that Cu-Zn catalyst prepared at a copper to zinc molar ratio of 2:1,addition of precipitator into salt solution,and a calcination temperature of 450℃exhibited the best catalytic activity.Furthermore,after the addition of Zn species,CuO particle size decreased and dispersion increased,the electronic synergy between Cu and Zn and oxygen vacancy was the main reasons for improving the ethynylation performances.The excessive reduction of Cu2+in Cu-Zn catalysts to Cu affected the activity and stability of catalysts.

关 键 词：炔醛化反应 铜锌催化剂 焙烧温度 氧空位 

分 类 号：TQ203.2[化学工程—有机化工]