High Yield Method to Produce HMF from Fructose
The platform molecule 5-hydroxymethylfurfural (HMF), produced from the dehydration of C6 sugars (hexoses), is considered to be one of the top value-added chemicals. The efficient production of HMF from carbohydrates and its subsequent separation from the solvents remains a challenge.
Current methods to produce HMF from biomass-derived sugars using water as a solvent suffer from the drawback of poor selectivity. Improvement in selectivity is observed when solvent systems composed of water and an organic solvent are used; however, HMF loss during difficult product separation typically limits the application of such methods. Moreover, high HMF purity is critical for downstream applications, especially in production of HMF-derived monomers used in sustainable polymer synthesis (e.g., FDCA required for production of PEF).
UW–Madison researchers have discovered that a solvent system comprising water and a polar aprotic solvent (e.g., acetone) is ideally suited for converting C6 carbohydrates into HMF at reasonably low temperatures (such as 120°C), low acid concentration and at very high yields and efficiencies.
The C6 carbohydrate used in the method can be derived from any source including biomass (processed or unprocessed), cellulose and lignocellulosic sources, etc. The nature of the C6 carbohydrate is not critical to the method, although fructose is preferred.
- High fructose conversion (>94%)
- High HMF selectivity (>95%)
- High purity HMF (>96% purity)
- Compatible with existing infrastructure in the high fructose corn syrup industry
- Solvents are stable, environmentally benign and easy to separate.
Production of HMF from fructose/biomass-derived sugars
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