Patent ID: 9181209
Filing Date: 2015-11-10
Classification: C07D

Abstract:
1. A process comprising: (a) providing a reactor comprising a distillation column disposed on top of a reaction vessel, wherein the reaction vessel contains an acid solution comprising a soluble acid catalyst and a water-miscible organic solvent; (b) bringing an aqueous feedstock solution into contact with the acid solution in the reaction vessel for a residence time sufficient to produce a mixture of water and furfural, wherein the aqueous feedstock solution comprises C (c) removing the mixture of water and furfural from the top of the distillation column; and (d) adding water or the aqueous feedstock solution to at least a portion of the contents of the reaction vessel comprising organic solvent, acid catalyst, water, unreacted sugars and nonvolatile byproducts to precipitate water-insoluble byproducts and removing the precipitated water-insoluble byproducts,