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首页> 外文期刊>Separation and Purification Technology >Separation of alpha-cyano-3-phenoxybenzyl alcohol from alpha-cyano-3-phenoxybenzyl acetate using solvent extraction
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Separation of alpha-cyano-3-phenoxybenzyl alcohol from alpha-cyano-3-phenoxybenzyl acetate using solvent extraction

机译：使用溶剂萃取从α-氰基-3-苯氧基苄基乙酸酯中分离α-氰基-3-苯氧基苄基醇

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摘要

Separation of alpha-cyano-3-phenoxybenzyl alcohol (CPBA) from alpha-cyano-3-phenoxybenzyl acetate (CPBAc) by solvent extraction was investigated.The effects of the species and volume ratio of solvents on the distribution coefficients and solubility of CPBA and CPBAc in several extraction systems were also studied.Furthermore,effects of pH of aqueous phase and temperature on the stability of CPBA were determined.Through screening,water:methanol:n-hexane:benzene = 3:7:7:3 (volume ratio) was selected as the optimal extraction system to separate CPBA from CPBAc.At 25 deg C,after five extraction stages,the purity of CPBAc in the organic enriched upper phase was 95.2% (mol) and the yield reached 80.6%.And the purity of CPBA in the aqueous enriched lower phase was 98.8% (mol) and the yield reached 62.6%.
机译：研究了溶剂萃取法分离α-氰基-3-苯氧基苄基乙酸酯（CPBAc）和α-氰基-3-苯氧基苄基乙酸酯（CPBAc）的方法。还研究了几种萃取体系中的CPBAc。此外，还测定了水相pH和温度对CPBA稳定性的影响。通过筛选，水：甲醇：正己烷：苯= 3：7：7：3（体积比）选择）作为从CPBAc中分离CPBAc的最佳萃取体系。在25摄氏度下，经过五个萃取阶段，有机富集上层相中CPBAc的纯度为95.2％（mol），收率达到80.6％。在含水富集的下层相中CPBA的产率为98.8％（摩尔），收率达到62.6％。

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