Lactic Acid Permeation through Deep Eutectic Solvents-Based Polymer Inclusion Membranes.

Michiaki Matsumoto,Sae Takemori,Yoshiro Tahara

doi:10.3390/membranes10090244

Michiaki Matsumoto, Sae Takemori + Show 1 more

Open Access

https://doi.org/10.3390/membranes10090244

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Journal: Membranes	Publication Date: Sep 19, 2020
Citations: 10	License type: CC BY 4.0

Affiliation: Doshisha University

Abstract

Lactic acid that is prepared by fermentation is a compound in food, cosmetic pharmaceutical, and chemical industries. Since a simple technique is desired that separates lactic acid from the cultures, we propose lactic acid permeation through a poly(vinyl chloride)(PVC)-based membrane that contains deep eutectic solvents (DESs) as a carrier. Lactic acid was successfully permeated through polymer inclusion membranes (PIMs) containing hydrophilic DESs, urea-choline chloride and glucose-choline chloride. The permeation behavior was explained by the facilitated transport mechanism based on the solution-diffusion model. Simple preparation of thinner membranes in the PIM process and higher permeation rates are advantages over the supported liquid membrane process. The PVC-based membrane process containing environmentally benign hydrophilic DESs is promising for lactic acid separation on an industrial scale.

Highlights

Lactic acid, which is prepared by fermentation, is a critical compound in food, cosmetic pharmaceutical, and chemical industries [1]
We proposed supported liquid membranes (SLMs) and polymer inclusion membranes (PIMs) based on ionic liquids (ILs), such as Aliquat 336 and Cyphos IL-101 for lactic acid separation [6,7,8], and lactate successfully permeated through both membranes
We conducted the permeation of lactic acid through a polyvinyl chloride (PVC)-based membrane containing deep eutectic solvents (DESs) as a carrier

Summary

Introduction

Lactic acid, which is prepared by fermentation, is a critical compound in food, cosmetic pharmaceutical, and chemical industries [1]. A chemical precipitation method has been industrially applied as a separation technique [3]. A simple and economical technique is required that separates lactic acid from the fermentation broth. The proposed separation techniques involve solvent extraction, reactive distillation, electrodialysis, aqueous two-phase systems, ion exchange, adsorption, and liquid membranes [3,4,5]. Deep eutectic solvents (DES) emerged as a new generation of ILs prepared by mixing a hydrogen bond acceptor (HBA) and a hydrogen bond donor (HBD) with remarkably low volatility [9].

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