Catalytic Conversion of Biomass‐Derived Carbohydrates into Levulinic Acid Assisted by a Cationic Surface Active Agent. Issue 44 (10th December 2019)

• Record Type: Journal Article
• Authors: Onkarappa, Sharath Bandibairanahalli; Bhat, Navya Subray; Parashuram, Devaraj; Dutta, Saikat
• Is Part Of: ChemistrySelect. Volume 4:Issue 44(2019)
• Page Start: 13021
• Page End: 13024
• Publication Date: 2019-12-10
• Subjects: acid-hydrolysis -- biomass -- levulinic acid -- renewable synthesis -- surface active agent; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201902006
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Levulinic acid (LA), a bio‐renewable chemical building block, has been produced in good isolated yields by treating biomass‐derived carbohydrates with aqueous hydrochloric acid in the presence of quaternary ammonium salts as cationic surface‐active agent (SAA). Under optimized conditions (120 °C, 3 h, 20.2% HCl), the one‐pot process afforded LA in 80% isolated yield from glucose using only 5.77 mol% (10 wt%) of benzyltributylammonium chloride (BTBAC) at the SAA. The control reaction (no BTBAC) provided LA in only 64% yield from glucose under identical conditions. The process was optimized on the reaction temperature, loading of BTBAC, and the concentration of HCl. The use of BTBAC led to a nearly 8–17% increase in yield of LA (compared to the control reaction) for all the carbohydrates studied. Abstract : A one‐pot preparation of levulinic acid (LA) has been achieved in good isolated yields by treating biomass‐derived carbohydrates with aqueous hydrochloric acid in the presence of benzyltributylammonium chloride (BTBAC) as a cationic surface‐active agent (SAA). The reaction was optimized on temperature, type of SAA, loading of SAA, and concentration of hydrochloric acid used. Under optimized condition (120 °C, 3 h, 20.2% HCl, 5.77 mol% BTBAC), LA was obtained in 80% isolated yield from glucose, whereas the control reaction (no BTBAC) provided only 64% of LA. LA was obtained in 8–17% higher yields from all the carbohydrates, compared to control reactions, studied using BTBAC as the cationic SAA.