应用微反应器合成碳酸丙烯酯的工艺与模拟  

Synthesis process and simulation of propylene carbonate in microreactor

作　　者：贺同强 李明燃 蒋宾伟 任伟民 HE Tongqiang;LI Mingran;JIANG Binwei;REN Weimin(CNOOC Petrochemical Engineering Co.,Ltd.,Jinan 250000,Shandong,China;School of Chemical Engineering,Dalian University of Technology,Dalian 116023,Liaoning,China)

机构地区：[1]中海油石化工程有限公司,山东济南250000 [2]大连理工大学化工学院,辽宁大连116023

出　　处：《精细化工》2023年第2期441-447,共7页Fine Chemicals

基　　金：中央高校基本科研业务费资助(DUT20TD111)。

摘　　要：应用分子内双功能催化剂,设计了利用环氧丙烷和CO_(2)偶合反应合成碳酸丙烯酯(PC)的连续微通道工艺。考察了催化剂用量、反应温度、反应压力、CO_(2)与环氧丙烷物质的量比对PC收率的影响,通过Fluent软件模拟微通道中气液混合情况,研究了不同工况对环氧丙烷与CO_(2)混合效果的影响。结果显示,即使在较温和条件(120℃、1.5 MPa)和催化剂用量为0.5‰(以环氧丙烷物质的量为基准,下同)下,环氧丙烷仍可高效地转化为PC,反应30 s环氧丙烷转化率可达78%。在相同条件下,微通道反应工艺转化速率是传统釜式反应工艺的1.8倍,表明所设计的微通道反应工艺对反应过程中气液混合传质具有显著强化作用,影响气液混合的关键因素为气体扰动。A continuous microreactor process for propylene carbonate(PC)synthesis via coupling reaction of propylene oxide and CO_(2)was designed using an intramolecular bifunctional catalyst.The effects of catalyst dosage,reaction temperature,reaction pressure,and molar ratio of CO_(2)to propylene oxide on PC yield were then investigated.Moreover,the influence of different working conditions on the mixing effect of propylene oxide and CO_(2)were analyzed based on Fluent simulation of the gas-liquid mixing in the microchannel.The results showed that propylene oxide could be efficiently converted to corresponding PC even at mild conditions(120℃,1.5 MPa),lower catalyst dosage 0.5‰(based on the amount of substance propylene oxide,the same below)with a conversion rate of 78%within 30 s.Under the same conditions,the conversion rate of the microchannel reaction process was 1.8-fold that of the traditional kettle reaction process,indicating significant enhancement of gas-liquid mass transfer in the designed microchannel reaction process.The gas disturbance played a key role in gas-liquid mixing.

关 键 词：微反应器 CO_(2) 环状碳酸酯 气液混合 Fluent模拟 精细化工中间体 

分 类 号：TQ225.5[化学工程—有机化工]