Title: Concurrent xylose, glucose, oxalic acid, lignin and cellulose-producing pollutionless process with straw as material
Application Number: 96101585 Application Date: 1996.04.01
Publication Number: 1160768 Publication Date: 1997.10.01
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C13K1/02,D21C3/00
Applicant(s) Name: Fang Weiwu Address: 030009
Inventor(s) Name:
Attorney & Agent:
Abstract:
     The present invention belongs to organic chemical technology. Wood scrap and other plant material are passed through five technological processes of pre-treatment, twice hydrolysis, alkali digestion, black liquor recovery and cellulose refining to obtain five products of xylose hydrolyzate, glucose, oxalic acid, lignin and refined cellulose. It features comprehensive utilization, normal pressure circular acid hydrolysis resulting in dense hydrolyzate, oxalic acid acidification of black liquor to recover saccharide liquid, oxalic acid and alcohol and twice hydrolysis to produce high-purity cellulose.
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