SnCl_4/强酸性离子交换树脂催化合成乙酸甲酯研究  

Synthesis of methyl acetate catalyzed by SnCl_4 supported on strong acid ion exchange resin

作　　者：仝海娟[1] 左卫元[1] 史兵方[1] 段艳[1] 陈盛余[1] 

机构地区：[1]百色学院化学与环境工程学院,广西百色533000

出　　处：《天然气化工—C1化学与化工》2016年第4期33-37,共5页Natural Gas Chemical Industry

基　　金：国家自然科学基金项目(41163007);广西高校科学技术研究项目(KY2015LX387;KY015YB278);广西高校重点学科立项建设项目-材料物理与化学重点学科;百色学院院级项目(2012KB09)

摘　　要：分别用硫酸锌、硫酸锰、氯化锡对几种强酸性离子交换树脂进行改性并评价其催化乙酸和甲醇合成乙酸甲酯的活性,确定Sn^(4+)负载的D072型强酸性阳离子交换树脂活性最佳。以其为催化剂,在单因子实验基础上,通过正交试验法对反应温度、催化剂投加量、酸醇物质的量比、反应温度等影响合成乙酸甲酯的因素进行了优化,并考察了催化剂的的稳定性。结果表明:在催化剂用量为乙酸质量的5%,反应时间2.5h,酸醇物质的量比1:3,反应温度70℃的工艺条件下,乙酸转化率为79.2%,且催化剂的稳定性良好,可循环使用6次。Several strong acid ion exchange resins were modified using zinc sulfate, manganese sulfate or tin tetrachloride, respectively, and the their catalytic activities for synthesis of methyl acetate were evaluated. The Sn4~ supported D072 type resin exihihited the best activity. Over it, the conditions for synthezing methyl acetate, including reaction time, temperature, molar ratio of acetic acid to methanol and catalyst dosage were optimized by the single factor experiments and the further orthogonal tests, and the stability of catalyst was also investigated. The optimum conditions for synthesis of methyl acetate were determined as follows： acetic acid/methanol molar ratio of 1：3, reaction time of 2.5h, reaction temperature of 70℃ and catalyst/acetic acid mass ratio of 5%. Under above conditions, the conversion of acetic acid was 79.2%, and the catalytic performance maintain stable after being used 6 times. Keywords： methyl acetate; synthesis; catalyt; tin tetrachloride; strong acid ion exchange resin

关 键 词：乙酸甲酯 合成 催化剂 氯化锡 强酸性阳离子交换树脂 

分 类 号：TQ225.241[化学工程—有机化工] TQ426