萃取分离邻甲代烯丙氧基苯酚中邻苯二酚的相平衡

在25℃时，以蒸馏水和0.5％碳酸钠水溶液为萃取剂，从邻苯二酚单醚化制备邻甲代烯丙氧基苯酚的醚化液中萃取回收邻苯二酚，通过对不同浓度的邻苯二酚进行萃取，确定了相平衡曲线以及两相分配系数。同时利用二甲苯对醚化液的互溶性以及对水的不溶性，萃取剂与二甲苯同时使用，能够有效提高分配系数。另外对醚化液进行多级错流萃取研究，结果表明，邻苯二酚的萃取率可以达到90.2％，具有良好的萃取效果。

Phase equilibrium in extraction of catechol from o-methallyloxyphenol

The phase equilibrium curve and partition coefficients in the recovery of catechol from o-methallyloxyphenol etherification product at 25℃ was studied through extraction of catechol with different concentrations.The extractant was distilled water and 0.5% sodium carbonate solution.Meanwhile, because xylene has good mutual solubility with o-methallyloxyphenol and insolubility in water, it can be used for auxiliary extraction, and this is a good method for improving the partition coefficient.In addition, after multilevel cross-flow extraction of the etherification product, the extraction yield reached above 90.2%，and the chosen extractants were efficient and practicable.