Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2011-03-01
2011-03-01
Dentz, Bernard (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
active
07897794
ABSTRACT:
Disclosed are methods of at least partially purifying HMF from an aqueous mixture containing reactants and products of HMF synthesis from fructose that relies on use of non-functional polymeric resins. A first type of non-functional polymeric resin preferentially adsorbs HMF relative to fructose and is used to remove a majority of fructose from the reaction mixture. HMF is desorbed from the first non-functional polymeric resin with an organic solvent such as acetone. A second type of non-functional polymeric resin preferential adsorbs furfural from an aqueous reaction mixture allowing HMF to pass through. In one embodiment, these non-functional polymeric resins may be used alone in combination with each other to obtain HMF of high purity. In other embodiments, one or more of the foregoing non-functional polymeric resin resins is used in combination with cation exchange chromatography to still further purify the HMF.
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Geier Douglas F.
Soper John Glenn
Archer Daniels Midland Company
Dentz Bernard
Roberts Mark W.
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