Separation of butyric acid from aqueous media using menthol-based hydrophobic deep eutectic solvent and modeling by response surface methodology,Biomass Conversion and Biorefinery

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Separation of butyric acid from aqueous media using menthol-based hydrophobic deep eutectic solvent and modeling by response surface methodology
Biomass Conversion and Biorefinery ( IF 3.5 ) Pub Date : 2021-07-14 , DOI: 10.1007/s13399-021-01711-7
Melisa Lalikoglu ₁

Affiliation

In the last decade, research on deep eutectic solvents used in many fields with different roles in chemistry has attracted great interest. Literature reviewing shows that one of these solvents’ most common usage areas is extraction applications as green extraction media, especially to recover biomass conversion products. In this work, hydrophobic deep eutectic solvents (HDES) with different hydrogen bond donors (HBD) and hydrogen bond acceptor (HBA) were mixed and used as a solvent to separate butyric acid from aqueous solutions. Menthol (M)-based HDESs were prepared using three long-chain carboxylic acids (nonanoic acid (NA), decanoic acid (DA), and dodecanoic acid (DDA)) and trioctylphosphine oxide (TOPO) in different molar ratios of binary combinations. Density and refractive index values of HDES were determined. To assess the obtained results, extraction efficiency (E%) and distribution coefficient (D) values were calculated. It was observed that HDES containing menthol and TOPO were extracted more than 90% of butyric acid from the water phase. The transition of butyric acid from the aqueous to the organic phase was demonstrated by FTIR analysis. The Box-Behnken method based on response surface methodology (RSM) was used to explore the impacts of the experimental conditions on reactive extraction yield and to obtain a model equation for the separation of butyric acid from its aqueous solution using M:TOPO hydrophobic deep eutectic solvent.

Graphical abstract

中文翻译：

使用基于薄荷醇的疏水性低共熔溶剂从水性介质中分离丁酸并通过响应面方法建模

在过去的十年中，在化学中具有不同作用的许多领域中使用的深共熔溶剂的研究引起了极大的兴趣。文献回顾表明，这些溶剂最常见的使用领域之一是作为绿色提取介质的提取应用，尤其是回收生物质转化产品。在这项工作中，将具有不同氢键供体 (HBD) 和氢键受体 (HBA) 的疏水性低共熔溶剂 (HDES) 混合并用作从水溶液中分离丁酸的溶剂。使用三种长链羧酸（壬酸 (NA)、癸酸 (DA) 和十二烷酸 (DDA)）和三辛基氧化膦 (TOPO) 以不同摩尔比的二元组合制备基于薄荷醇 (M) 的 HDES。测定了 HDES 的密度和折射率值。为了评估获得的结果，计算提取效率 (E%) 和分配系数 (D) 值。据观察，含有薄荷醇和 TOPO 的 HDES 从水相中提取了超过 90% 的丁酸。FTIR 分析证明了丁酸从水相到有机相的转变。使用基于响应面法 (RSM) 的 Box-Behnken 方法探索了实验条件对反应萃取率的影响，并获得了使用 M:TOPO 疏水性深共晶从丁酸水溶液中分离丁酸的模型方程溶剂。FTIR 分析证明了丁酸从水相到有机相的转变。使用基于响应面法 (RSM) 的 Box-Behnken 方法探索了实验条件对反应萃取率的影响，并获得了使用 M:TOPO 疏水性深共晶从丁酸水溶液中分离丁酸的模型方程溶剂。FTIR 分析证明了丁酸从水相到有机相的转变。使用基于响应面法 (RSM) 的 Box-Behnken 方法探索了实验条件对反应萃取率的影响，并获得了使用 M:TOPO 疏水性深共晶从丁酸水溶液中分离丁酸的模型方程溶剂。

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更新日期：2021-07-14

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