摘要
针对甘油法合成环氧氯丙烷第二阶段-环化阶段的工作,以氢氧化钠和氢氧化钙分别作为碱源,通过平行实验考察了环化阶段的优化工艺条件。氢氧化钠为碱源,反应温度为55℃,反应时间为35 min,n(氢氧化钠)∶n(二氯丙醇)=1.10∶1.00时,环化收率为66.52%;氢氧化钙为碱源,反应温度为80℃,反应时间为10 min,n[1/2Ca(OH)2]∶n(二氯丙醇)=1.10∶1.00时,环化收率为69.52%。
The optimal conditions were evaluated for the preparation of epiehlorohydrin using sodium hydroxide or calcium hydroxide as the base for the cyclization reaction. When sodium hydroxide was selected as the base, the reaetion temperature was 55℃; the reaction time was 35 minutes; and the molar ratio of NaOH to DCP was 1.1:1.0; the yield for ECH could reach up to 66.52%. When caleium hydroxide was used as the base for the eyclization reaction, the reaction temperature was 80℃; the reaetion time was 10 minutes; the molar ratio of 1/2Ca(OH)2 to DCP was 1.1:1.0; the yield for ECH could reach up to 69.52%.
出处
《精细化工中间体》
CAS
2015年第2期66-69,共4页
Fine Chemical Intermediates
关键词
甘油
二氯丙醇
环氧氯丙烷
glycerin
dichloropropanol
epiehlorohydrin