Processo para o alvejamento de uma polpa celulósica e processo para redução de matéria colorida no efluente do mesmo

Processo para o alvejamento de uma polpa celulósica e processo para redução de matéria colorida no efluente do mesmo

A process for bleaching cellulosic pulp to a G.E. brightness of at least about 75 and a viscosity of at least about 14 wherein the effluent from the bleaching process is of reduced colored matter content and exhibits reduced COD. The process comprises DZD stages without interstage treatment of the p...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: JEAN J. RENARD, SHYAM S. BHATTACHARJEE
Format: Patent
Sprache:por
Schlagworte:
APPARATUS THEREFOR
PAPER-MAKING
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
TEXTILES
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Beschreibung
Zusammenfassung:A process for bleaching cellulosic pulp to a G.E. brightness of at least about 75 and a viscosity of at least about 14 wherein the effluent from the bleaching process is of reduced colored matter content and exhibits reduced COD. The process comprises DZD stages without interstage treatment of the pulp other than by an optional water wash.