微孔膜对O/W型乳液破乳的研究

采用以正丁醇 水为实验体系和十二烷基磺酸钠为表面活性剂制得的乳液为研究对象 ,研究了膜通量随时间的变化规律 ,考察了透过压、乳液中油含量以及膜孔径等因素对破乳效果的影响。结果表明 ,膜破乳技术是一种很有效的破乳技术。乳液通量的稳定在本实验条件下需要 4h以上。增加透过压有利于乳液通量的增加 ,但透过油中油含量会随之增加。在同样操作条件下 ,增加乳液油含量不利于通量增加和透过液中油含量的减少。微孔膜的孔径对膜通量有很大的影响 ,随着孔径增大 ,膜通量迅速增加 ,而透过液的油含量仍可保持较低量     

微滤膜破乳技术的研究

基于膜法破乳技术的研究进展,选择了水＋正丁醇,水＋煤油以及水＋煤油＋30％TBP（磷酸三丁酯）多种体系,研究了影响破乳效果的重要参数透过压,体系性质和膜孔径等对透过液通量和透过液水相含油量的影响,实验结果表明,膜法破乳是一种很有效的破乳技术,对于不同体系的乳液均有较好的通用性,膜法破乳过程受透过压和膜孔的影响较大,随着透过的增加,透过液通过量增加,透过液中水相的油含量也随之增加,膜孔径的增大有利于透过液通量的提高,当然在相同的透过压作用下透过渡水相的含油量也会随之增加,但控制较低的透过压时,水中的油含量可以得到较好的控制。     

微滤膜聚并破乳的机理研究

A study on the membrane coalescence demulsification was carried out with four working systems of water/n-butyl alcohol, water/n-octanol, water/30% TBP(in kerosene) and water/kerosene. The membranes made of polytetrafluoroethylene (PTFE) with 1.0μm pore size were used. The results indicated that the excellent demulsification efficiency for emulsions with various oil contents was obtained. A conductivity probe was used to study the demulsification mechanism. An electrode probe was designed and used to determine the oil content near the membrane surface. The obtained data showed that the oil content in the permeated stream was much higher than that in the feed emulsion. A physical mechanism to explain the membrane demulsification was put forward.