文献类型：期刊文献

中文题名：1,1,2-三氯乙烷催化裂解制偏二氯乙烯工艺开发

英文题名：Catalytic dehydrochlorination of 1,1,2-trichloroethane into vinylidene chloride

作者：李冰[1];袁向前[1];宋宏宇[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2016

卷号：36

期号：9

起止页码：122

中文期刊名：现代化工

外文期刊名：Modern Chemical Industry

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

语种：中文

中文关键词：1,1,2-三氯乙烷;偏二氯乙烯;催化裂解;苯醌

外文关键词：1; 1; 2-trichloroethane; 1; 1-dichloroethene; dehydrochlorination; benzoquinone

摘要：利用浸渍法制备了γ-Al_2O_3负载金属盐催化剂,考察了活性组分、温度、负载率对1,1,2-三氯乙烷脱氯化氢反应的影响。在γ-Al_2O_3负载2%Cs F、180℃、0.5 MPa优化条件下,1,1,2-三氯乙烷转化率达30%,偏二氯乙烯选择性达90%。用气-液-固三相反应器考察了沸腾鼓泡状态、添加阻聚剂苯醌对不同温度下Cs F-γ-Al_2O_3液相催化1,1,2-三氯乙烷制偏二氯乙烯的寿命的影响。结果表明,在113℃、0.1 MPa下,Cs F-γ-Al_2O_3对偏二氯乙烯的选择性高达85%,寿命长达230 h。用高温凝胶色谱(GPC)和红外光谱(IR)对Cs F-γ-Al_2O_3表面吸附物种进行表征,结果显示,苯醌由于其对偏二氯乙烯的阻聚作用而能延长催化剂寿命。
Metal salt catalysts loaded on γ-Al_2O_3 is prepared by impregnation method. The effects of active component,temperature and load ratio on the 1,1,2-trichloroethane dehydrochlorination reaction is studied. The optimal condition is determined as 2% of Cs F loaded on γ-Al_2O_3 at 180℃ and 0. 5 MPa. Under the optimal condition,the conversion rate of 1,1,2-trichloroethane is 30% and the selectivity of vinylidene chloride is 90%. The influences of boiling state and benzoquinone（ BQ） on the activity of cesium fluoride（ CsF） for selective dehydrochlorination of 1,1,2-trichloroethane（ TCE） into vinylidene chloride（ VDC） are investigated by the gas-liquid-solid three-phase reactor.Cs F is found to exhibit high selectivity（ 85%） to VDC and stable activity（ more than 230 hours） at 386 K. The polymers formed on surface of the catalyst are characterized by means of gel permeation chromatography（ GPC） and infrared spectroscopy（ IR）. The results show that BQ can prolong the life of Cs F by inhibition of auto-polymerization of VDC.