METHOD OF PRODUCING CELLULOSE FOR CHEMICAL PROCESSING

METHOD OF PRODUCING CELLULOSE FOR CHEMICAL PROCESSING

FIELD: paper-and-pulp industry. SUBSTANCE: wood cuttings are hydrolyzed by simultaneously feeding steam into bottom part of digester and withdrawing it from top part of digester. Hydrolyzate is discharged through turpentine-blowing valve until pressure 0.20-0.30 MPa is achieved, after which sulfate...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: TSIKOLIN V.JU, KOVRIZHKIN S.D, KNIGIN O.A, RYZHOV JU.JU, TRIFONOV G.A, JAKOVLEV N.G, MOSKAL' S.V, SERGEEV A.D
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS THEREFOR
PAPER-MAKING
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
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Beschreibung
Zusammenfassung:FIELD: paper-and-pulp industry. SUBSTANCE: wood cuttings are hydrolyzed by simultaneously feeding steam into bottom part of digester and withdrawing it from top part of digester. Hydrolyzate is discharged through turpentine-blowing valve until pressure 0.20-0.30 MPa is achieved, after which sulfate cooking is carried out. EFFECT: improved quality of product. 2 cl, 3 tbl, 5 ex