NaA分子筛膜反应器内乙基叔丁基醚的合成  

Synthesis of ethyl tert-butyl ether in a NaA membrane reactor

作　　者：曹悦[1,2] 李宇璇 马晓华 许振良[1] CAO Yue;LI Yu-xuan;MA Xiao-hua;XU Zhen-liang(State Key Laboratory of Chemical Engineering,Membrane Science and Engineering R&D Laboratory,Chemical Engineering Research Center,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;College of Food Science and Technology,North West University,Xi’an 710069,China)

机构地区：[1]化学工程联合国家重点实验室,华东理工大学化学工程研究所膜科学与工程研发中心,上海200237 [2]西北大学食品科学与工程学院,陕西西安710069

出　　处：《高校化学工程学报》2021年第4期649-656,共8页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(21176067);陕西省自然科学基金重点研发计划(2020NY-123)。

摘　　要：针对乙醇和叔丁醇反应制备乙基叔丁基醚(ETBE)时产物水的阻碍效应所造成的ETBE收率不高的问题,提出以中空纤维NaA分子筛膜为核心元件,构建渗透汽化膜反应器(PVMR),使反应生成的水能够通过渗透汽化作用高效地在线脱除。通过与普通反应器的对比实验发现,料液初始醇比的升高可以抑制副反应的进行,提高ETBE的最终收率,但同时乙醇的稀释作用会导致PVMR脱水效率的下降。此外,无论是增加初始料液中乙醇的用量,还是采用具有过程强化作用的PVMR,对该醚化反应过程的促进作用均体现在主反应选择性的提高,而对叔丁醇转化率的影响则相对较小。结果表明,通过反应条件的优化,ETBE的收率由最低时的9%提高到25%。In order to solve the problem of low ethyl tert-butyl ether(ETBE)yield caused by water produced during the reaction of ethanol and tert-butanol,a hollow fiber NaA zeolite membrane was apply as a core component for preparing a pervaporation membrane reactor(PVMR),where water could be efficiently removed by pervaporation.Comparing with none-membrane reactors,the results show that increasing of ethanol in initial feed solution could suppress side reaction and improve ETBE yield,but the dilution effect also results in a decrease of PVMR dehydration efficiency.In addition,both increasing ethanol amount and applying PVMR can strengthen the process,and the promotion was mainly reflected in the improvement of main reaction selectivity,while the change in conversion was limited.The results show that the yield of ETBE can be increased from 9%to 25%by optimizing the reaction conditions.

关 键 词：NAA分子筛膜 渗透汽化 膜反应器 乙基叔丁基醚 醚化反应 

分 类 号：TQ031.2[化学工程]