• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Recovery of nonionic surfactant from VOC-contaminated coacervate phase solutions by co-current vacuum stripping: Effect of surfactant concentration, temperature, and solute type
【24h】

Recovery of nonionic surfactant from VOC-contaminated coacervate phase solutions by co-current vacuum stripping: Effect of surfactant concentration, temperature, and solute type

机译：通过并流真空汽提从受VOC污染的凝聚层相溶液中回收非离子表面活性剂：表面活性剂浓度，温度和溶质类型的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To make a cloud point extraction (CPE) process economically feasible, the used surfactant in the concentrated or coacervate phase should be recycled and reused. We have demonstrated a co-current vacuum stripping using a 30.5-cm long column packed with glass Raschig rings effectively removes as much as 90% of the toluene from a surfactant coacervate phase solution without flooding or plugging. It was found that the apparent Henry's law constant of the volatile organic compounds (VOCs) was significantly reduced due to solubilization of VOCs in surfactant micelles, but increased substantially with increasing temperature. In addition, it was observed that the increase in hydrophobicity of the VOCs results in higher micellar solubilization in the coacervate solution, leading to lower VOC removal efficiency. However, over 87% of all studied VOCs (benzene, toluene, ethylbenzene, 1,2 dichloroethane, trichloroethylene, and tetra-chloroethylene) were removed from a coacervate solution within a single stage operation. The removal of VOCs increases with decreasing surfactant concentration and VOC hydrophobicity, and also increases with increasing system temperature.
机译：为了使浊点萃取（CPE）工艺在经济上可行，浓缩或凝聚相中使用的表面活性剂应进行回收和再利用。我们已经证明，使用装满玻璃Raschig环的30.5厘米长的色谱柱进行并流真空汽提可有效地从表面活性剂凝聚相溶液中除去多达90％的甲苯，而不会发生溢流或堵塞。发现由于挥发性有机化合物（VOC）在表面活性剂胶束中的溶解而明显降低了挥发性有机化合物（VOC）的表观亨利定律常数，但是随着温度的升高而显着增加。另外，观察到VOCs疏水性的增加导致凝聚层溶液中较高的胶束增溶，导致较低的VOC去除效率。但是，在一步操作中，从凝聚层溶液中除去了超过87％的所有挥发性有机化合物（苯，甲苯，乙苯，1,2二氯乙烷，三氯乙烯和四氯乙烯）。随着表面活性剂浓度的降低和VOC疏水性的降低，VOC的去除量也会增加，并且随着系统温度的升高，VOC的去除量也会增加。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号