化工学报2016，Vol.67Issue(7)：2851-2856,6.DOI:10.11949/j.issn.0438-1157.20160149
离子液体-分子溶剂复合萃取剂脱除水中酚类化合物
Removal of phenols from aqueous solution by ionic liquid-molecular solvent composite extractant
摘要
Abstract
Hydrophobic ionic liquid (IL)-molecular solvent composite extractant was developed for the removal of phenols from aqueous solution. The results showed that tetradecyltrihexylphosphonium bromide ([P66614]Br)-ethyl acetate mixtures could not only decrease the viscosity of extractant notably, but also have good affinity to phenols. The distribution coefficient of phenol in [P66614]Br-ethyl acetate-water biphasic system ([P66614]Br/ethyl acetate molar ratio 1:4) was 5.3 times higher than that using pure ethyl acetate as extractant, 9—60 times higher than those using several common hydrophobic ILs and only 25.3% smaller than that using pure [P66614]Br. The viscosity of 20% (mol) [P66614]Br mixture was only 1% of pure [P66614]Br. The solvation interactions calculated by COSMO-RS indicated that there were strong hydrogen-bonding interaction between the phenol and [P66614]Br, which drove phenol into the [P66614]Br-rich phase. This mixture also showed good extraction abilities for phloroglucinol, 4-chlorophenol and 2,5-dinitrophenol with distribution coefficients of 91, 490 and 1492, respectively. These results provided a new opportunity for designing phenol-removing solvent with both good thermodynamic and kinetic properties.关键词
离子液体/萃取/氢键/酚类/水处理Key words
ionic liquids/extraction/hydrogen bonding/phenols/water treatment分类
信息技术与安全科学引用本文复制引用
郭少聪,杨启炜,邢华斌,张治国,鲍宗必,任其龙..离子液体-分子溶剂复合萃取剂脱除水中酚类化合物[J].化工学报,2016,67(7):2851-2856,6.基金项目
浙江省自然科学基金项目 （）
国家自然科学基金重点项目（21436010）。@@@@supported by the Natural Science Foundation of Zhejiang Province (LY15B060003) and the National Natural Science Foundation of China (21436010) （LY15B060003）
