Lactic Acid Extraction in Systems Containing Organic Amines,Industrial & Engineering Chemistry Research

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Lactic Acid Extraction in Systems Containing Organic Amines
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-01-25 00:00:00 , DOI: 10.1021/acs.iecr.7b01112
Igor Yu. Fleitlikh ₁ , Boris N. Kuznetsov ₁ , Lidya K. Nikiforova ₁ , Natalya A. Grigorieva ₁ , Natalya G. Beregovtsova ₁

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A new high-performance system for lactic acid (HL) extraction from glucose-containing solutions is proposed. Trialkylbenzylammonium sulfate (C₇–C₉ fraction) with p-tert-butyl phenol in a diluent is used as the extractant. The maximum extraction region for HL is found to be at pH = 5.0–7.0, which coincides with the range of optimal pH values for glucose conversion to lactic acid. In five extraction stages, at an organic to aqueous phase ratio of 1:1, the acid recovery is 96.7%. HL stripping is carried out with 2.0–3.0 M NaOH solutions, which achieves a significant increase in HL concentration. The stripping process in alkaline medium is easy (not less than 93.45% in one stage) due to the formation of trialkylbenzylammonium phenolate in the organic phase. Regeneration and conversion of the extractant to the SO₄-form (TABAS) are carried out by treating the organic phase with sulfuric acid.

中文翻译：

包含有机胺的系统中的乳酸萃取

提出了一种新的高性能系统，用于从含葡萄糖的溶液中提取乳酸（HL）。三烷基苄基硫酸铵（C ₇ –C ₉馏分），对-叔稀释剂中的丁基苯酚用作萃取剂。发现HL的最大提取区域在pH = 5.0–7.0，这与葡萄糖转化为乳酸的最佳pH值范围相吻合。在五个萃取阶段中，有机相与水相的比例为1：1，酸回收率为96.7％。用2.0–3.0 M NaOH溶液进行HL汽提，可显着提高HL浓度。由于在有机相中形成了苯酚三烷基苄基铵盐，因此在碱性介质中的汽提过程很容易（一步法不少于93.45％）。通过用硫酸处理有机相来进行萃取剂的再生和转化为SO ₄形式（TABAS）。

更新日期：2018-01-26

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