管式反应器液相循环反应制备二甘醇乙烯基醚  

Preparation of diethylene glycol vinyl ether by liquid phase cyclic reaction in tubular reactor

作　　者：黄心权 黎四芳[1] HUANG Xinquan;LI Sifang(College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China)

机构地区：[1]厦门大学化学化工学院,福建厦门361005

出　　处：《化工进展》2018年第A01期187-192,共6页Chemical Industry and Engineering Progress

摘　　要：以乙炔和二甘醇为原料,二甘醇钾为催化剂,采用管式反应器液相循环反应制备二甘醇乙烯基醚。研究了催化剂用量、反应温度、反应压力和停留时间等因素对乙炔转化率的影响,得到较为适宜的反应条件为:催化剂二甘醇钾用量为二甘醇质量的4%、反应温度175℃、反应压力6MPa、停留时间175s。在该条件下进行了液相连续循环反应,反应达到稳态时,二甘醇的转化率为76.03%,二甘醇单乙烯基醚收率为59.03%,二甘醇双乙烯基醚的收率为15.10%,合计二甘醇乙烯基醚总收率为74.13%。单位反应体积二甘醇乙烯基醚的产率为143.2g/(h·mL)。二甘醇与乙炔反应符合一级反应动力学方程,反应的指前因子k_0=1.20×10~8s^(–1),反应的活化能E=86.86kJ/mol。管式反应器中无气相乙炔,克服了高温高压下气相乙炔易燃易爆的危险。Using potassium diethylene glycolate as catalyst,diethylene glycol vinyl ether was synthesized from acetylene and diethylene glycol by liquid phase cyclic reaction in a tubular reactor.The effects of catalyst dosage,reaction temperature,reaction pressure and residence time on acetylene conversion were studied.The appropriate reaction conditions are as following:the dosage of potassium diethylene glycolate is 4%based on diethylene glycol mass,the reaction temperature is 175℃,the reaction pressure is 6MPa and the residence time is 175s.Under these conditions,continuous production of diethylene glycol were conducted.At steady state,the conversion of diethylene glycol reached 76.03%,the yield of diethylene glycol monovinyl ether was 59.03%,the yield of diethylene glycol divinyl ether was 15.10% and the total yield of diethylene glycol vinyl ether was up to 74.13%.The reaction of diethylene glycol and acetylene was in good agreement with the first order reaction kinetics.The pre-exponential factor k0 is 1.20×10^8s^–1,and the reaction activation energy E is 86.86kJ/mol.Because of no existence of gas-phase acetylene in the tubular reactor,the danger of flammable and explosive acetylene in the gas phase under high temperature and high pressure has been overcome.

关 键 词：反应器 二甘醇乙烯基醚 乙炔 反应动力学 制备 

分 类 号：TQ223.2[化学工程—有机化工]