Separation of phenols from aqueous micellar solutions by cloud point extraction
Separation of phenols from aqueous micellar solutions by cloud point extraction
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DOI：
10.1006/jcis.2002.8613
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发表时间：
2002-11-01
影响因子：
9.9
通讯作者：
Szymanowski, J
中科院分区：
文献类型：
--
作者：
Materna, K;Szymanowski, J
以氧乙基化十二烷基甲酯为非离子表面活性剂，采用云点技术从水溶液中回收苯酚、4-甲基苯酚和4-硝基苯酚。氧乙基化十二癸酸甲酯是一种方便的非离子表面活性剂。通过改变表面活性剂的亲水性或加入第二种非离子表面活性剂和/或电解质，可以很容易地改变它们的云点。使用亲水亲脂平衡优选模拟氧乙基化十二烷酸甲酯及其与其他表面活性剂的混合物的浊点。富表面活性剂相的组成取决于电解质类型和过热情况。该相只能含有5-15%的水。苯酚的回收率按4-硝基苯酚> -甲基苯酚>苯酚的顺序变化，在氯化钠的存在下增加。盐析电解质的存在对于降低浊点和提高萃取效率都是可取的。(C) 2002 Elsevier Science （USA）。
The cloud point technique was used to recover phenol, 4-methylphenol, and 4-nitrophenol from aqueous solutions using oxyethylated methyl dodecanoates as nonionic surfactants. Oxyethylated methyl dodecaroates are convenient nonionic surfactants for such separations. Their cloud points can be easily modified by a change in surfactant hydrophilicity or by the addition of a second nonionic surfactant and/or an electrolyte. The use of the hydrophile lipophile balance is preferred to model the cloud point of oxyethylated methyl dodecanoates and their mixtures with other surfactants. The composition of the surfactant-rich phase depends on electrolyte type and the overheating. The phase can contain only 5-15% of water. Recovery of phenols changes in the order 4-nitrophenol > 4-methylphenol > phenol and is increased in the presence of sodium chloride. The presence of salting-out electrolytes is preferred both to decrease the cloud point and to increase the efficiency of extraction. (C) 2002 Elsevier Science (USA).