METHOD AND SYSTEM FOR RECOVERING FIBERS FROM FIBROUS PRODUCTS

For recycling, fibers are recovered from fibrous products by using two or more hydrothermal reactors to conduct hydrolysis. The fibrous products are divided into batches. A batch to be hydrolyzed is fed to a selected reactor under atmospheric pressure. A superheated reaction solution containing subc...

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Bibliographische Detailangaben
Hauptverfasser:	YAO, Lei, KAJIWARA, Kanji, LEUNG, John Kin Ming, CHAN, Jason Lap Hung, KEH, Edwin Yee Man, CHEN, Collin Xin, CHAN, Alex Hok Chung, LIU, Yang, SUZUOKA, Akihiro, CHAN, Philip Yun Ngok
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY DISPOSAL OF SOLID WASTE PAPER-MAKING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS RECLAMATION OF CONTAMINED SOIL SOIL REGENERATION OF PULPING LIQUORS TEXTILES THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	For recycling, fibers are recovered from fibrous products by using two or more hydrothermal reactors to conduct hydrolysis. The fibrous products are divided into batches. A batch to be hydrolyzed is fed to a selected reactor under atmospheric pressure. A superheated reaction solution containing subcritical water and one or more organic acids is transferred alternately and/or successively among the reactors to hydrolyze respective batches in the reactors. By using two or more reactors to carry out the heat treatment, it is possible to reuse the organic acid-containing reaction solution without discarding. Since the reaction solution, maintained at a high temperature, can be recycled without discarding and cooling, high material-utilization efficiency and high energy efficiency is achievable. Furthermore, a system for recovering the fibers is realizable compactly to occupy a small space since the cooling equipment is not required and only two reactors need to be installed.