Reactive Extraction of Lactic Acid by Using Tri‐n‐octylamine: Structure of the Ionic Phase,Chemistry - A European Journal

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Reactive Extraction of Lactic Acid by Using Tri‐n‐octylamine: Structure of the Ionic Phase
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2016-01-28 , DOI: 10.1002/chem.201503799
Matthias Aimer ₁ , Elias Klemm ₁ , Bernd Langanke ₂ , Helmut Gehrke ₃ , Cosima Stubenrauch ₄

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Lactic acid is a promising biogenic platform chemical which can be produced by fermentation of cellulose and hemicellulose. However, separating lactic acid from the fermentation broth is extremely costly and technically complex. We therefore investigated whether liquid/liquid extraction of lactic acid with tri‐n‐octylamine is a cost‐effective alternative to the existing downstream processing method. In order to find an answer to this question, the structure of the middle phase of the occurring three‐phase region, which is enriched with up to 20 wt. % lactic acid, was explored. The results of our IR, small‐angle X‐ray scattering and NMR measurements show that this phase is ionic and has a bicontinuous structure. Due to the analogy with bicontinuous microemulsions, it should be possible to further enrich the lactic acid, which could lead to a rethink regarding the design of extraction processes.

中文翻译：

使用三正辛胺反应萃取乳酸：离子相的结构

乳酸是一种有前途的生物平台化学品，可以通过纤维素和半纤维素的发酵来生产。然而，从发酵液中分离乳酸是非常昂贵和技术复杂的。因此，我们研究是否乳酸与三-液/液萃取Ñ辛胺是现有下游加工方法的一种经济高效的替代品。为了找到这个问题的答案，出现的三相区域的中间相的结构被富集了多达20 wt。探索了％的乳酸。我们的IR，小角度X射线散射和NMR测量的结果表明，该相是离子性的，具有双连续结构。由于与双连续微乳液类似，应该有可能进一步富集乳酸，这可能导致人们对萃取工艺的设计进行重新思考。

更新日期：2016-01-28

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