MUMBAI, India, July 13 -- Intellectual Property India has published a patent application (202631075969 A) filed by Birla Institute Of Technology, Mesra on June 19, 2026, for A Process For Selective Recovery Of 1,3-Propanediol From Aqueous Stream Using Dl- Menthol: Dodecanoic Acid (3:1) Hydrophobic Eutectic Solvent.
Inventors include Dr. Padmini Padmanabhan; Dr. Anand Bharti; and Raj Akshat.
The application for the patent was published on July 10, 2026, under issue no. 28/2026.
Abstract: “SELECTIVE RECOVERY OF 1,3-PROPANEDIOL FROM AQUEOUS STREAM USING HYDROPHOBIC EUTECTIC SOLVENT” Disclosed herein is a method for selective recovery of 1,3-propanediol (1,3-PDO) from an aqueous stream using a hydrophobic eutectic solvent (HES) comprising DL-menthol and dodecanoic acid in a 3:1 molar ratio. The aqueous stream containing 1,3-PDO, glycerol, 2,3-butanediol, and organic acids is contacted with the HES to form a biphasic mixture, from which 1,3-PDO preferentially partitions into the extract phase. The extract phase is cooled to 3°C–5°C to selectively solidify the HES while retaining 1,3-PDO in liquid form, enabling simple product-solvent separation. The solidified HES is regenerated by mild heating and reused for at least three consecutive cycles, achieving recovery greater than 70% and purity above 95%. [Shall be published with FIG. 01]
Disclaimer: Curated by HT Syndication.
