联产1,1-二氟乙烷和氯乙烯的方法研究  

Study on the Method of Co-production of 1,1-Difluoroethane and Vinyl Chloride

作　　者：周华东 王爱国 余慧梅 赵刚 童超丽 范海燕 ZHOU Huadong;WANG Aiguo;YU Huimei;ZHAO Gang;TONG Chaoli;FAN Haiyan(Zhejiang Quhua Fluor-Chemistry Co.Ltd.;Zhejiang Jinju Chemical Co.Ltd.,Quzhou,Zhejiang 324004)

机构地区：[1]浙江衢化氟化学有限公司 [2]浙江晋巨化工有限公司,浙江衢州324004

出　　处：《化工生产与技术》2022年第6期14-16,19,I0003,共5页Chemical Production and Technology

摘　　要：采用联产1,1-二氟乙烷(HFC-152a)和氯乙烯(VCM)的方法,将二氯乙烷和氟化氢汽化后进入反应器进行催化反应得到1,1-二氟乙烷和氯乙烯。结果表明,HFC-152a市场较好的情况下,反应温度330℃,空速2500 h^(-1),HF与二氯乙烷的摩尔比15∶1为优化的反应条件;VCM市场较好的情况下,反应温度200℃,空速2000 h^(-1),HF与二氯乙烷的摩尔比为1∶1为优化的反应条件。为了解决反应过程中未完全转化的烯烃与目标产品易形成共沸难分离的问题,在精馏过程中引入了饱和有机溶剂,得到HFC-152a的质量分数可达99.9%以上。通过1套装置同时联产HFC-152a和VCM这2种产品,具有原料单程转化率高、绿色环保、可连续化操作的特点。1,1-difluoroethane(HFC-152a)and vinyl chloride(VCM)were co-produced by vaporizing dichloroethane and hydrogen fluoride into a reactor for catalytic reaction.The results showed that the optimum reaction conditions were reaction temperature of 330℃,space velocity of 2500 h^(-1) and molar ratio of HF to dichloroethane of 15:1 when HFC-152a market condition was good.Under the better condition of VCM market,the reaction temperature was 200℃,the space velocity was 2000 h^(-1),and the molar ratio of HF to dichloroethane was 1:1.In order to solve the problem that incompletely converted olefins and target products are easy to form azeotrope and difficult to separate in the reaction process,saturated organic solvents were introduced in the distillation process,and the mass fraction of HFC-152a can reach more than 99.9%.HFC-152 a and VCM are co-produced by one unit,which has the characteristics of high conversion rate of raw materials,green environmental protection and continuous operation.

关 键 词：1 1-二氟乙烷 氯乙烯 联产 催化剂 方法 

分 类 号：TQ222.23[化学工程—有机化工]