Tetraethylammonium Amino Acid Ionic Liquids and CO2 for Separation of Phenols from Oil Mixtures,Energy & Fuels

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Tetraethylammonium Amino Acid Ionic Liquids and CO2 for Separation of Phenols from Oil Mixtures
Energy & Fuels ( IF 5.2 ) Pub Date : 2018-09-18 00:00:00 , DOI: 10.1021/acs.energyfuels.8b02166
Youan Ji ₁ , Yucui Hou ₂ , Shuhang Ren ₁ , Congfei Yao ₁ , Weize Wu ₁

Affiliation

Phenols have wide applications and much commercial value, and they are obtained from oil mixtures by separation. However, the previous separation agents have low separation efficiency or corrosive halide ions or are difficult to be regenerated. In this work, we designed several tetraethylammonium amino acid (TAAA) ionic liquids (ILs) without corrosive halide ions and found that the ILs could separate phenols from oil mixtures with much higher extraction efficiency and could be regenerated using CO₂. The effects of separation time, initial phenol content, TAAA type, water content in TAAA, and phenol type on separation were investigated. It has been found that TAAA can separate phenols with high separation efficiencies, and the maximum separation efficiency of phenol can reach up to 99.0% at a TAAA:phenol mole ratio of 0.60. Meanwhile, ultimate phenol contents can reach as low as 1.40 g/dm³. The initial phenol content almost has no influence on the ultimate phenol contents. For real coal tar oil mixtures, the separation efficiency of phenols can reach up to 98.6%. The TAAAs can be regenerated and reused without significant decreases in separation efficiency of phenols. The separation mechanism has also been proposed based on chemical reactions.

中文翻译：

四乙铵氨基酸离子液体和CO ₂用于分离石油混合物中的苯酚

苯酚具有广泛的应用和很大的商业价值，它们是通过分离从油混合物中获得的。然而，先前的分离剂具有低分离效率或腐蚀性卤离子或难以再生。在这项工作中，我们设计了几种不含腐蚀性卤化物离子的四乙基铵氨基酸（TAAA）离子液体（IL），发现该ILs可以从油混合物中分离出苯酚，具有更高的萃取效率，并且可以使用CO ₂进行再生。研究了分离时间，初始苯酚含量，TAAA类型，TAAA中的水含量和苯酚类型对分离的影响。已经发现，TAAA可以高分离效率分离苯酚，并且当TAAA∶苯酚摩尔比为0.60时，苯酚的最大分离效率可以达到99.0％。同时，最终苯酚含量可低至1.40 g / dm ³。初始酚含量几乎对最终酚含量没有影响。对于真正的煤焦油混合物，苯酚的分离效率可以达到98.6％。TAAA可以再生和再利用，而不会显着降低酚的分离效率。还已经基于化学反应提出了分离机理。

更新日期：2018-09-18

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