Preparation of high purity wood sugars

• US 2,759,856 A
• Filed: 11/05/1952
• Issued: 08/21/1956
• Est. Priority Date: 11/05/1952
• Status: Expired due to Term

• Current Assignee: William A. Saums, William Schoen
• Original Assignee: William A. Saums, William Schoen
• Inventors: Saums, William A., Schoen, William
• Application Number:
  US03/318,954
• Time in Patent Office: 1,385 Days
• US Class Current: 127/37
• CPC Class Codes: C13K 1/02 obtained by saccharification of cellulosic materials manufacture of fodder A23K10/32
• CPC Class Codes: C13K 13/002 Xylose

Claims

1. METHOD OF CONVERTING HEXOSE AND PENTOSE OLIGOSACCHARIDES TO THE CORRESPONDING MONOSACCHARIDES WHICH COMPRISES SUBJECTING LIGNOCELLULOSE TO HYDROLYSIS AT STEAM PRESSURES OF ABOUT 200-1200 P.S.I. FOR ABOUT 30-5 SECONDS, RESPECTIVELY, WATER WASHING THE HYDROLYZED LIGNOCELLULOSE, ADDING TO THE AQUEOUS SOLUTION SO-OBTAINED SULFURIC ACID IN AN AMOUNT OF ABOUT 3% TO ABOUT 11.5% OF THE WEIGHT OF THE SOLUTION, HEATING THE AQUEOUS SOLUTION UNDER SUPERATMOSPHERIC PRESSURE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 120*-150* C. FOR A PERIOD OF TIME WITHIN THE RANGE OF ABOUT 18 TO ABOUT 40 MINUTES, FILTERING THE MIXTURE, NEUTRALIZING THE FREE SULFURIC ACID BY THE ADDITION OF AN ALKALINE EARTH METAL CARBONATE, AND THEN FILTERING THE MIXTURE WHEREBY THERE IS OBTAINED AN AQUEOUS SOLUTION CONTAINING PRINCIPALLY MANNOSE, ARABINOSE, GALACTOSE, GLUCOSE, AND XYLOSE HAVING A PURITY OF MORE THAN ABOUT 85%.