多级错流液液萃取法分离醋酸水溶液的研究

Separation of Acetic acid and Water System by Multi-stage Cross-flow Liquid Liquid extraction

以醋酸正丙酯—正丙醇—NaCl的复合溶液为萃取剂,采用多级错流液液萃取法对醋酸水溶液进行分离。考察了静置时间、溶剂比及萃取级数对分离效果的影响。实验结果表明:当静置时间为60 min,溶剂比(S/F)为3∶1时,经过三级错流液液萃取后,萃余相中醋酸的质量含量为0.54%。文章研究结果为进一步研究提供了基础数据。

Multi-stage cross-flow liquid extraction was employed for the separation of acetic acid and water system with n-Propyl acetate--l-propyl alcohoI--NaCI as the extractant. The effects of standing time, solvent ratio and extraction progression on the separation were investigated. The optimized process parameters were as follows： stirring time was 60 min, solvent ratio was 3 ： 1 and extraction progression was 3, the mass content of acetic acid in raffinate phase was only 0.54 %.