乳状液膜法提取分离水中苯胺

EXTRACTION OF ANILINE FROM AQUEOUS SOLUTIONS USING EMULSION LIQUID MEMBRANES

采用非流动载体乳状液膜体系对水中苯胺的提取进行了研究 .考察了影响苯胺传质的几种因素 :内水相盐酸浓度、外水相pH值、表面活性剂种类和浓度、乳水比等 .结果表明 ,在适宜的操作条件下 ,当水中苯胺浓度为 5 0 0mg·L-1时 ,经过一级液膜处理 ,水中苯胺的含量可降到 1 5mg·L-1.另外初步探讨了表面活性剂的结构和性质对膜相黏度、界面黏度、稳定性和苯胺传质速率的影响 .

An emulsion liquid membrane process without mobile carrier was developed to separate aniline from aqueous solution. The effect of some factors on the transport of aniline was researched in the membrane process. These factors are the concentration of hydrochloric acid in internal aqueous phase, the pH in external aqueous phase (aqueous solution), the type and quantity of surfactants, and the ratio of emulsion and internal aqueous phase. The experiment showed that, under suitable conditions, the concentration of aniline was less than 1.5 mg&middotL-1 in the external aqueous phase treated by one-stage liquid membrane process when the initial concentration of aniline was 500 mg&middotL-1 in aqueous solution. The effects of surfactant's structure and property on the viscosity of membrane phase, the viscosity of oil/water interface and the mass transfer of aniline were discussed.