Process for jointly producing furfural and levulinic acid from bagasse and other lignocellulosic materials
Abstract
Abstract THE PRODUCTION OF FURFURAL AND LEVULINIC ACID IN HIGH YIELDS FROM LIGNOCELLULOSIC MATERIAL, SUCH AS BAGASSE IN A SINGLE COOK BY HEATING WITHIN THE RANGE OF 160*-70*C. IN A CLOSED VESSEL UNDER SATURATING PRESSURE IN AN AQUEOUS SULFURIC ACID COOKING LIQUOR OR RELATIVELY LOW CONCENTRATION AND WITH A RELATIVELY LOW LIGNOCELLULOSIC MATERIAL TO COOKING LIQUOR RATIO TO CAUSE EXTENSIVE DEPOLYMERIZATION OF CARBOHYDRATE POLYMERS AND MATERIAL FORMATION OF FREE PENTOSES AND HEXOSES BUT LITTLE PRODUCTION OF FURFURAL OR LEVULINIC ACID; ISOTHERMALLY DISTILLING OFF AT A TEMPERATURE WITHIN THIS RANGE THE FURFURAL FORMED AND BEING FORMED, WHEREBY A COOKING LIQUOR MORE CONCENTRATED WITH RESPECT TO SULFURIC ACID IS PRODUCED; AND HEATING THE RESULTING REACTION MIXTURE TO A TEMPERATURE WITHIN THE RANGE OF 185*210*C., THIS TEMPERATURE BEING MAINTAINED UNTIL OPTIMUM PRODUCTION OF LEVULINIC ACID IS ACHIEVED.
Inventors
- 👤 Emiliano Ramos-Rodriguez
Bibliographic Details
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