Process for two-stage digestion of natural products containing xylane, in order to obtain xylose

US4105467A · kind A · utility

Assignee

• Sud Chemie, Inc. · US

Inventors

• Hans Buckl · Bad Aibling, DE
• Bernd Brenner · Moosburg an der Isar, DE
• Wolfgang Eisenschmid · Wolnzach, DE

Key dates

• Filing date: Oct 4, 1976
• Grant date: Aug 8, 1978
• Expiry date: Oct 4, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C13K13/002
• WIPO field: Food chemistry
• WIPO sector: Chemistry

Abstract

An improvement in a process for the production of xylose or xylitol wherein a vegetable material is contacted with a basic substance and the solid residue is thereafter treated with an acid, the improvement resides in the use of stone nut shells, in employing a two-stage digestion initially with a 1.5-6 molar alkali metal hydroxide solution at 10.degree.-50.degree. C. and thereafter diluting the digestion mass to 0.75 molar or less and digesting at a temperature of at least 60.degree. C.