Patent ID: 6603026
Filing Date: 2003-08-05
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 for said hydrolysis with an acid, and providing a biomass to said vessel, and subjecting said biomass, within said vessel, to said hydrolysis and reaction within said acid to form a hydrolysate, containing said heterocyclic compounds and said acid, and withdrawing said hydrolysate from said vessel, and separating means for removing said heterocyclic compounds from said hydrolysate to provide a hydrolysate substantially devoid of heterocyclic compounds for recycle to said vessel and heterocyclic compounds for subsequent processing, and withdrawing solids, remaining from said hydrolysis of said biomass, from said vessel, and filtering said solids resulting in a filtrate for recycle to said vessel and filtered solids, for subsequent processing, thereby removing heterocyclic compounds, derived from a biomass, from said vessel and removing solids remaining from hydrolysis of biomass from said vessel.