Patent ID: 6441202
Filing Date: 2002-08-27
Classification: C07D

Abstract:
A method to produce sugars from a biomass by hydrolysis and subject the sugars to dehydration to form heterocyclic compounds which comprises:providing a vessel with an acid for said hydrolysis, and providing a supply of a biomass to said vessel, and subjecting said biomass, within said vessel, to said hydrolysis to form said sugars, subjected to dehydration, to form a hydrolysate, containing said heterocyclic compounds and said acid, and withdrawing said hydrolysate from said vessel, and extracting the previously withdrawn hydrolysate with a hydrocarbon to form an extractate containing dissolved heterocyclic compounds within said hydrocarbon, and a raffinate, providing a hydrolysate substantially devoid of heterocyclic compounds for recycle to said vessel, and withdrawing residue, remaining from said hydrolysis of said biomass, from said vessel, and filtering said residue resulting in a filtrate for recycle to said vessel and, filtered residue, for subsequent processing, thereby removing heterocyclic compounds, derived from a biomass, from the hydrolysis vessel and removing residue remaining from hydrolysis of biomass from the hydrolysis vessel.