Intensification of esterification through emulsification: isolation of dilute low molecular weight carboxylic acids,Reaction Chemistry & Engineering

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Intensification of esterification through emulsification: isolation of dilute low molecular weight carboxylic acids
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2018-10-08 00:00:00 , DOI: 10.1039/c8re00194d
Andreas Toth _{1,

2,

3,

4,

5} , Susanne Lux _{1,

2,

3,

4,

5} , Daniela Painer _{1,

2,

3,

4,

5} , Matthäus Siebenhofer _{1,

2,

3,

4,

5}

Affiliation

A concept for isolation of low molecular weight carboxylic acids (e.g., acetic acid) from dilute aqueous streams was developed. This concept of combining chemical conversion of the carboxylic acids with in situ liquid–liquid extraction enhanced by catalysis and emulsification was proven applicable for carboxylic acid concentration of 1 mol l⁻¹. Chemical conversion was achieved by esterification with 1-octanol, catalysed by the surfactant 4-dodecylbenzenesulfonic acid. Emulsification induced by the catalyst was confirmed to be essential for high conversion and separation efficiency. Investigations were supported and evaluated by design of experiments and yielded conversions beyond 54.3% and separation efficiencies beyond 57.5% for acetic acid. Evaluation of process parameters yielded a quadratic model for prediction of process performance. Applicability of the concept for formic acid, propionic acid and butyric acid isolation from aqueous feed was confirmed.

中文翻译：

通过乳化作用增强酯化作用：分离稀的低分子量羧酸

提出了从稀水流中分离低分子量羧酸（例如乙酸）的概念。这种将羧酸的化学转化与通过催化和乳化增强的原位液-液萃取相结合的概念已被证明适用于1 mol l ^-1的羧酸浓度。化学转化是通过在表面活性剂4-十二烷基苯磺酸的催化下用1-辛醇酯化来实现的。证实由催化剂引起的乳化对于高转化率和分离效率是必不可少的。通过实验设计来支持和评估研究，乙酸的转化率超过54.3％，分离效率超过57.5％。过程参数的评估产生了一个用于预测过程性能的二次模型。确认了该概念适用于从含水进料中分离甲酸，丙酸和丁酸。

更新日期：2018-10-08

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