摘要
乙炔二聚制备乙烯基乙炔(MVA)是乙炔法生产氯丁橡胶过程中的关键反应,该反应存在乙炔转化率低、目标产物乙烯基乙炔选择性差等问题。文章以聚乙二醇(PEG)为配体添加到传统的Nieuwland催化剂(氯化亚铜-氯化铵-盐酸-水体系)中以解决上述问题,对影响该反应的可能因素,如PEG用量、反应温度以及乙炔空速等条件进行了系列优化。实验结果表明:PEG的加入,能有效改善传统Nieuwland催化剂催化性能,提高目标产物乙烯基乙炔的选择性,在最佳反应工艺条件下,乙炔的转化率为15%,乙烯基乙炔的选择性达到90%。
Acetylene dimerization reaction is one of the key-steps in acetylene-based processes for chloroprene rubber production. However,the drawbacks of low acetylene conversion and low monovinylacetylene（ MVA）selectivity exist. In order to overcome the aforesaid problems,polyethylene glycol（ PEG） was selected as the ligand added into traditional Nieuwland catalyst（ Cu Cl-NH4Cl-HClaq-H2O） to assist the reaction. After the optimization of the experimental factors including the amount of PEG,reaction temperature and C2H2 space velocity,it shows that the catalyst promoted by PEG can effectively improve the MVA selectivity. Moreover,15%of acetylene conversion and 90% of MVA selectivity were obtained under the optimal conditions.
出处
《化学工程》
CAS
CSCD
北大核心
2015年第6期60-64,共5页
Chemical Engineering(China)
基金
国家973计划项目(2012CB722603)
国家自然科学基金资助项目(21463021)
兵团博士基金项目(2012BB010)
