Complex Extraction of Phenol and Cresol from Model Coal Tar with Polyols, Ethanol Amines, and Ionic Liquids Thereof
Complex Extraction of Phenol and Cresol from Model Coal Tar with Polyols, Ethanol Amines, and Ionic Liquids Thereof
复制标题
多元醇、乙醇胺及其离子液体复合萃取模型煤焦油中苯酚和甲酚
DOI：
10.1021/ie402599d
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发表时间：
2014-01-08
影响因子：
4.2
通讯作者：
Li, Chun-Xi
中科院分区：
文献类型：
--
作者：
Meng, Hong;Ge, Chang-Tao;Li, Chun-Xi
为了开发一种从低温煤焦油中回收酚类化合物的绿色工艺，研究了单乙醇胺、双乙醇胺和三乙醇胺等12种萃取剂的萃取性能，（MEA、DEA、TEA）、其具有甲酸根（FA）或乙酸根（Ac）阴离子的六种质子化离子液体（IL）、氯化胆碱和两种多元醇（乙二醇，甘油），在不同的条件下进行了研究，沿着与酚类的反萃取醚。萃取性能顺序为MEA > DEA > TEA>乙二醇>甘油，而乙醚的反萃取性能正好相反。油中甲苯的共存和温度对醇胺及其离子液体的萃取性能影响不大。萃取剂的萃取性能与其与苯酚的络合能力一致，即乙醇胺>醚>离子液体>多元醇，这表现为苯酚在上述溶剂中的紫外光谱红移。[HMEA]FA是最有前途的萃取剂，其整体萃取性能良好。
To develop a greener process for reclaiming phenolic compounds from low temperature coal tar, extractive performance of twelve extractants, including mono-, di-, and triethanol amines (MEA, DEA, TEA), six protonated ionic liquids (ILs) thereof with formate (FA) or acetate (Ac) anion, choline chloride, and two polyols (glycol, glycerol), were studied at varying conditions, along with the back extractability of phenols by ether. The extraction performance is MEA > DEA > TEA ≈ ILs > glycol > glycerol, while the back extraction performance of ether is just the opposite. The coexistent toluene in oil and temperature show a little influence on the extraction performance of alcoholic amines and their corresponding ILs. The extraction performance of extractants is consistent with their complexability with phenol, i.e. ethanol amines > ether > ILs > polyols, as manifested by the red shift of the UV spectrum of phenol in the above solvents. [HMEA]FA is the most promising extractant for its overall extraction perfor...