摘要
环氧氯丙烷是一种用途广泛的化工原料,工业上由二氯丙醇在塔式反应器中经皂化环合反应生产。为了简化反应系统的连续控制、提高装备生产率,选择了一种具有脉冲混合结构的微通道反应器,设计了连续合成环氧氯丙烷的新工艺。研究了物料摩尔配比、反应温度、停留时间、碱液浓度等工艺参数的影响。结果表明,当n(NaOH):n(二氯丙醇)为1.1:1,反应温度为60℃,停留时间为10 s,NaOH原料浓度为20%(wt)时,二氯丙醇的转化率达到99.6%,环氧氯丙烷的收率达到98.5%。与传统塔式反应工艺相比,微通道反应工艺提高了环氧氯丙烷的收率,缩短了反应时间。微通道结构对反应也存在影响,脉冲混合式微通道连续反应工艺的原料消耗较低,装置效率较高,产品收率较高。
Epichlorohydrin is usually produced via the alkalic cyclization of dichloropropanol in towerreacting systems. In order to improve the continuous control and productivity of the reaction system, a newcontinuous process was designed by using a micro-channel reactor with pulse mixing structure.Dichloropropanol was used as the starting material, and the influences of different factors including reactantsratio, reacting temperature, residence time and alkali liquor concentration were investigated. Experimentalresults show that when an optimized condition, i.e. n（NaOH）： n（Dichloropropanol） = 1.1：1, reacting temperatureof 60~C, residence time of 10s, NaOH concentration of 20%（wt） is used, the conversion of dichloropropanol canreach to 99.6% with a yield of 98.5%. Compared with traditional tower reacting processes, the yield is higherwith less reacting time in the new micro-channel reacting process. The results show that the structure of themicro-channel has observable effects on the cyclization reaction. Less raw material consumption, higher productyield and superior reactor productivity are achieved in the continuous process with the pulse mixing channelreacting system.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2014年第2期352-357,共6页
Journal of Chemical Engineering of Chinese Universities
关键词
微通道反应器
二氯丙醇
环合
环氧氯丙烷
Micro-channel reactor
Dichloropropanol
Cyclization
Epichlorohydrin
