Summary: The Wisconsin Alumni Research Foundation (WARF) is seeking commercial partners interested in developing a streamlined method for the recovery and purification of furan derivatives like HMF and levulinic acid which could significantly improve the feasibility of these reactive intermediates as platform chemicals for further processing into fuels commodity chemicals and other valuable products. Need: New renewable sources of transportation fuel and commodity chemicals are needed to meet continuing demand. Biomass has tremendous potential as a renewable resource for the production of fuels and chemicals because it is inexpensive and readily available from crop residues and forests.Furan derivatives such as hydroxymethylfurfural (HMF) or furfural derived from biomass may substitute for petroleum-based building blocks used to produce transportation fuels plastics and fine chemicals. For example levulinic acid which has been identified as a top biomass-derived chemical due to its ease of production for both five and six carbon sugars and its useful functional groups a ketone and a carboxylic acid can be produced from HMF or furfural. Levulinic acid is a platform chemical for forming other more valuable reactive chemicals including methyl vinyl ketone olefins and n-butenes. However currently it is more expensive to create commercially desirable products from biomass than petroleum feedstocks. Technology details: UW–Madison researchers have developed a novel cost-effective method for producing furan derivatives such as HMF furfural levulinic acid or gamma-valerolactone from biomass using alkylphenols as solvents. The overall strategy involves converting lignocellulosic biomass into value-added fuels and chemicals by partially removing oxygen to yield reactive intermediates such as HMF furfural and levulinic acid. These platform molecules are valuable commercial products and can be converted into desirable final products including liquid transportation fuels.The acid-catalyzed process for converting biomass into furan derivatives uses a biphasic reactor containing a reactive aqueous phase and an organic extracting phase which includes an alkylphenol. Alkylphenols are chemically distinct from previously reported extracting solvents. They offer efficient extraction of furan derivatives like levulinic acid and unique options for recovery and processing. For example the researchers found that no butylphenol is transferred into the aqueous phase minimizing solvent loss and contamination of the aqueous stream. Additionally alkylphenols are inert under conditions relevant to levulinic acid processing including distillation and selective hydrogenation in the presence of butylphenol to yield gamma-valerolactone. Technology Application: Recovery and purification of biomass-derived furan derivatives such as HMF furfural and levulinic acid.
1) Provides a cost-effective route for making valuable chemical intermediates from biomass 2) Furan derivatives do not need to be purified reducing costs. 3) All or a portion of the final products may be recycled for further use as an extracting phase. 4) Alkylphenols allow catalytic conversion of intermediates without purification. 5) Alkylphenol solvents do not extract water or acids enabling sustainable recovery of water and the acid catalyst for further biomass deconstruction. 6) Water does not need to be separated from the reaction products by evaporation at any stage reducing energy demands.