Data on the extraction of benzoic, salicylic and sulfosalicylic acids from dilute solutions using PEG-based aqueous two-phase systems

Inna V Zinov'eva; Yulia A Zakhodyaeva; Andrey A Voshkin

doi:10.1016/j.dib.2019.105033

Data on the extraction of benzoic, salicylic and sulfosalicylic acids from dilute solutions using PEG-based aqueous two-phase systems

Data Brief. 2019 Dec 19:28:105033. doi: 10.1016/j.dib.2019.105033. eCollection 2020 Feb.

Authors

Inna V Zinov'eva¹, Yulia A Zakhodyaeva¹, Andrey A Voshkin¹

Affiliation

¹ Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky Prospect, Moscow, 119991, Russia.

Abstract

The use of green chemistry principles in the extraction of aromatic acids from dilute aqueous solutions has been considered. The extraction of a number of aromatic acids important for the food and pharmaceutical industries in heterogeneous systems based on poly(ethylene) glycol 1500 (PEG-1500) has been studied for the first time. This research presents a data of the quantitative characteristics of the extraction of benzoic, salicylic and sulfosalicylic acids using a PEG-1500 (15 wt %)/Na₂SO₄ (9 wt %) aqueous two-phase system under various conditions (temperature and рН). The effect of various phase-forming salts (Na₂CO₃, (NH₄)₂SO₄, and (NH₄)₂HPO₄) in a PEG-1500-based aqueous two-phase system on the extraction of aromatic acids has been found. For salicylic and sulfosalicylic acids, distribution coefficients when using (NH₄)₂HPO₄ have been obtained that considerably exceed values for conventional water-organic solvent systems.

Keywords: Aqueous two-phase systems; Aromatic acids; Distribution coefficient; Eco-friendly extraction; Green chemistry; Poly(ethylene glycol).