摘要
乙烯基乙炔作为乙炔的下游产品,是生产氯丁橡胶和胶黏剂的重要原料,传统生产方法是由乙炔在纽兰德(Nieuwland)催化剂下发生二聚反应制得,反应器为鼓泡床反应器为主,但由于其气液传质传热效率相对较低,该反应中乙炔单程转化率和乙烯基乙炔的选择性较低。基于此,本文研究将高剪切反应器应用于乙炔二聚气液反应,结果表明:在传统的Nieuwland催化剂和鼓泡床反应器条件下,乙炔的单程转化率为25.5%,乙烯基乙炔的选择性为76.1%;而在高剪切反应器条件下,由于其高剪切速率,使得催化剂溶液和反应气充分接触,乙炔的单程转化率显著提高,达到43.2%,而乙烯基乙炔的选择性相对保持不变。对于配体改性的Nieuwland催化剂,高剪切反应器对乙炔单程转化率的提升幅度小一些,但乙炔单程转化率也分别达到45.7%(L1-NC)和50.9%(L2-NC),同样,对乙烯基乙炔的选择性影响不大。
As a downstream product of acetylene,monovinyl acetylene(MVA) is an important raw material for the production of chloroprene and adhesive.The traditional catalyst for acetylene dimerization is the Nieuwland catalyst,and the reaction is generally performed in a bubble column reactor.However,because of low gas-liquid mass transfer,the drawbacks of this catalytic system include low acetylene conversion rates and low MVA selectivity.In this paper,high-speed shear reactor was implied to gas-liquid acetylene dimerization reaction.The results show that under the conditions of the traditional Nieuwland catalyst and bubble column reactor,the acetylene conversion is 25.5% with 76.1% yield of MVAselectivity.To our delight,under the condition of high shear reactor that the catalyst solution and reaction gas are fully contacted due to its high shear rate,the one-way conversion rate of acetylene is significantly increased to 43.2%,and the selectivity of MVA remains relatively unchanged.For ligand-modified Nieuwland catalyst,the conversation of acetylene increased slightly with the yield of 45.7%(L1-NC) and 50.9%(L2-NC),respectively.Similarly,the effect of the MVA selectivity is not obvious.
作者
张启霞
游延贺
谢建伟
代斌
张金利
Zhang Qixia;You Yanhe;Xie Jianwei;Dai Bin;Zhang Jinli(School of Chemistry and Chemical Engineering,Shihezi University,Shihezi,Xinjiang 832003 China;School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China)
出处
《石河子大学学报（自然科学版）》
CAS
北大核心
2019年第1期67-72,共6页
Journal of Shihezi University(Natural Science)
基金
国家自然科学基金项目(21463021,21776179)
关键词
高剪切反应器
乙炔二聚
乙烯基乙炔
鼓泡床反应器
high-speed shear reactor
acetylene dimerization
monovinyl acetylene
bubble column reactor
