Legal status: rights
Patent type: invention
ApplicationNo.: 9111261.8 Application Date:1991-kloc-0/-28.
Inventor (Designer) Wei Zhiyi Chu Wei Zhihong Chu
Applicant Wei Zhiyi
Address: Zhengzhou Environmental Protection Bureau, 450006 Zhongyuan West Road, Zhengzhou, Henan.
The invention relates to a method for manufacturing artificial fiber pulp and xylitol by taking corn stalks as raw materials. The main technological processes for preparing its pulp are as follows: corn stalk cutting, crushing, cyclone separation of leaves, wet pulp removal, acid prehydrolysis, cooking (acid prehydrolysis sulfate cooking, alkali cooking, organic solvent cooking and ammonium sulfite cooking), screening, chlorination, alkali treatment, primary and secondary bleaching, acid treatment, water washing, sand removal and pulp discharge. A method for extracting xylitol from waste liquid of acid prehydrolysis of corn stalk includes neutralization, evaporation, decoloration, ion exchange, hydrogenation and crystallization. All the indexes of the prepared xylitol are better than those of corn cob crystallized xylitol.
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