Switchable (pH driven) aqueous two-phase systems formed by deep eutectic solvents as integrated platforms for production-separation 5-HMF
Switchable (pH driven) aqueous two-phase systems formed by deep eutectic solvents as integrated platforms for production-separation 5-HMF
复制标题
由低共熔溶剂形成的可切换（pH 驱动）水性两相系统作为生产分离 5-HMF 的集成平台
DOI：
10.1016/j.molliq.2020.115158
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发表时间：
2021-01-08
影响因子：
6
通讯作者：
Yan, Dong
中科院分区：
文献类型：
--
作者：
Yu, Xiaojie;Li, Mo;Yan, Dong
在单/两相体系之间诱导动态相移的功能对于分离过程至关重要。本文公开了由DES和盐组成的可切换（pH驱动）ATPS，其用作生产-分离方法的集成平台。在均相酸性水-DES介质中进行碳水化合物催化转化为5-羟甲基糠醛（5 HMF）。然后，形成的双相区诱导通过定制的pH值的水性均相介质，导致5-H MF从碳水化合物的完全分离。本文研究了相形成物质DES（由乙醇/正丙醇和[N-4444]Cl组成）、K3 C6 H5 O 7浓度和pH对5-HMF和果糖在DES-ATPS中分布的影响。DES-ATPS体系的最佳组成分别为30 wt% [N-4444]Cl：乙醇（1：2）或[N-4444]Cl：正丙醇（1：2）和35和40 wt% K3 C6 H5 O 7。结果表明，集成平台具有良好的催化效果，果糖转化率达到87.21%，5-HMF收率为46.76%，每0.1 g苹果皮可生产15.43 mg 5-HMF。结果表明，以[N-4444]Cl：乙醇（1：2）和[N-4444]Cl：正丙醇（1：2）组成的DES-ATPS在20 min内的提取率最高，分别为98.53%和98.59%。(C)2020爱思唯尔B. V.保留所有权利。
The function to induce dynamic-phase shifts between mono/biphasic systems is crucial to separation processes. Switchable (pH driven) ATPS composed of DESs and salts arc here disclosed to act as integrated platforms for the production-separation processes. The catalytic carbohydrate conversion to 5-hydroxymethylfurfural (5HMF) was conducted in a homogeneous acidic aqueous-DES medium. Then, the formation of the biphasic region was induced by tailoring the pH of the aqueous homogeneous medium, leading to the complete separation of 5-H MF from the carbohydrate. Herein, the effects of the phase-forming DES species (composed of ethanol/n-propanol and [N-4444]Cl), the K3C6H5O7 concentration and pH on the distribution of 5-HMF and fructose in DES-ATPSs were investigated. The optimal composition of the DES-ATPS system was 30 wt% [N-4444]Cl:ethanol (1:2) or [N-4444]Cl:n-propanol (1:2) and 35 and 40 wt% K3C6H5O7, respectively. The results showed that the integrated platforms have good catalytic effect, and the conversion rate of fructose reached 87.21%, with a 5-HMF yield of 46.76% and 0.1 g of apple peel produced 15.43 mg 5-HMF. The extraction efficiency of the DES-ATPS composed of [N-4444]Cl:ethanol (1:2) and [N-4444]Cl:n-propanol (1:2) were the highest within 20 min (5-HMF extraction efficiency 98.53% and 9859%, respectively), which has economic benefits and comprehensiveness. (C) 2020 Elsevier B.V. All rights reserved.