摘要
以带羧基侧基的聚芳醚砜醚酮酮(PESEKK-A)为主催化剂,PCl3为助催化剂,考察了两者不同质量比对甘油氯代法合成二氯丙醇的催化效果。结果表明:当PESEKK-A和PCl3用量分别为甘油质量的4.0%和1.5%时,二氯丙醇的收率达89.8%。比较了甲苯带水、二氯乙烷(DCE)连续恒沸带水和二氯乙烷间歇带水3种工艺,实验表明:DCE间歇带水二氯丙醇的收率提高到92.4%,产物中1,3-二氯-2-丙醇的质量分数为96.9%,具有较高的催化氯代选择性。
The synthesis of dichloropronol from chlorinated glycerol using poly ( aryl ether sulfone ether ketone ketone) having pendent carboxyl (PESEKK - A ) as the main catalyst and PCl3 as catalyst promote was performed. The influence of catalytic efficiency of the mass ratio between PESEKK - A and PCl3 was also investigated. The result showed that the yield of diehloropronol was above 89. 8% ,when the amount of PESEKK - A and PCl3 was 4. 0 and 1.5 percent of the mass of glycerol respectively. In this study, toluene dehydration, 1,2-dichloroethane ( DCE ) continuous and intermittent dehydration technique were applied, which indicated that the yield of dichloropronol was over 92. 4% using the intermittent dehydration process. Gas chromatography ( GC ) detected that the mass fraction of 1,3- dichloro-2-pronol was 96.9%. It showed that the synthesized dichloropropanols from catalytic chlorination glycerol was an effective and high selective method by optimized the technical conditions.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2009年第4期370-372,共3页
Fine Chemicals
基金
科技型中小企业技术创新基金项目(06C26213601342)~~
关键词
二氯丙醇
甘油
催化氯代
dichloropronol
glycerol
catalytic chlorination