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首页> 外文期刊>Journal of Molecular Liquids >Industrial application of ionic liquids for the recoveries of spent paint solvent
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Industrial application of ionic liquids for the recoveries of spent paint solvent

机译：离子液体在废油漆溶剂中的工业应用

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The recovery of industrially valuable organic solvents from liquid waste, generated in chemical processes, is economically crucial to countries which need to import organic solvents. In view of this, the main objective of this study was to determine the ability of selected ionic liquids, namely, 1-ethyl-3-methylimidazolium ethylsulphate, [EMIM][ESO4] and 1-ethyl-3-methylpyridinium ethylsulphate, [EMpy][ESO4] to recover aromatic components from spent paint solvents. Preliminary studies done on the liquid waste, received from a paint manufacturing company, showed that the aromatic components were present in the range of (6-21)% by volume. The separation of the aromatic components was performed with the ionic liquids listed above. The phases, resulting from the separation of the mixtures, were analysed with a gas chromatograph (GC) coupled to a FID detector. Chromatograms illustrate that the chosen ZB-Wax-Plus column gave excellent separation of all components of interest from the mixtures, including the isomers of xylene. The concentrations of aromatics recovered from the spent solvents were found to be in the % ranges of (13-33) and (23-49), respectively for imidazolium and pyridinium based ionic liquids. These results also show that there is a significant correlation between pi-character of ionic liquids and the level of extraction. It is therefore concluded that ionic liquids have the potential for macro-scale recovery of re-useable solvents present in liquid waste emanating from paint manufacture. (C) 2016 Elsevier B.V. All rights reserved.
机译：从化学过程中产生的液体废物中回收具有工业价值的有机溶剂，对​​于需要进口有机溶剂的国家在经济上至关重要。有鉴于此，本研究的主要目的是确定所选离子液体的能力，即1-乙基-3-甲基咪唑乙基硫酸盐[EMIM] [ESO4]和1-乙基-3-甲基吡啶鎓乙基硫酸盐[EMpy] ] [ESO4]从废油漆溶剂中回收芳族成分。从涂料制造公司收到的有关废液的初步研究表明，芳香族成分的存在量占体积的（6-21％）。用上面列出的离子液体进行芳族组分的分离。分离混合物产生的相用与FID检测器相连的气相色谱仪（GC）进行分析。色谱图表明，所选的ZB-Wax-Plus色谱柱可从混合物（包括二甲苯的异构体）中很好地分离出所有目标组分。对于基于咪唑鎓和吡啶鎓的离子液体，发现从废溶剂中回收的芳族化合物的浓度分别在（13-33）和（23-49）的％范围内。这些结果还表明，离子液体的pi特性与提取水平之间存在显着的相关性。因此，可以得出结论，离子液体具有大规模回收油漆生产废液中存在的可重复使用溶剂的潜力。 （C）2016 Elsevier B.V.保留所有权利。

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