Novel strategy for extraction and partitioning of phenol compounds from industrial residue of seriguela (Spondia purpurea L.) using aqueous two-phase systems

This work investigated the effect of different extracting agents on the extraction of phenolic compounds from agro-industrial residues of seriguela. Additionally, the phenolic compounds partitioning was studied using aqueous two-phase systems based on the extracting agents. The effect of the type of extracting agent such as water, organic solvent (1,3-dioxolane, acetone, 1,4-dioxane, and acetonitrile), and different ionic liquids (ILs) was evaluated. Afterward, solvent concentration, solid-liquid ratio, and time were analyzed in the extraction process. The solvent polarity played an important role in the extraction; thus 1,3-dioxolane (20 wt%), solid-liquid ratio 1:10 for 45 min was the best condition presented for organic solvents (1437.00 & PLUSMN; 0.01 mg L-1). On the other hand, [C2mim][CH3SO3] (20%), liquid-solid ratio 1:10 for 10 min was the best condition using IL (1842.56 & PLUSMN; 42.43 mg L-1). The mixture of water (60 wt%) + 1.3 dioxolane (20 wt%) + [C2mim][CH3SO3] (20 wt%) increased the concentration of phenolic compounds to 1894.22 & PLUSMN; 90.51 mg L-1. The phase separation was performed with the addition of organic solvent, reaching the mixture composition of 1,3-dioxolane (40 wt%) + [C2mim] [CH3SO3] (10 wt%) + water (50 wt%) at 25 & DEG;C, allowing the recovery of the phenolic compounds (98.63 & PLUSMN; 0.15%) to the bottom phase (IL-rich phase) and a partition coefficient of 0.0092 & PLUSMN; 0.0002. & COPY; 2023 Institution of Chemical Engineers. Published by Elsevier Ltd. All rights reserved.

Automated summary

This study investigated the effect of different extracting agents on the extraction of phenolic compounds from agro-industrial residues of seriguela. The results showed that 1,3-dioxolane and [C2mim][CH3SO3] were the best organic solvent and ionic liquid, respectively, and phase separation could be achieved by adding an organic solvent.