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Application filed by Int Paper CanadafiledCriticalInt Paper Canada
Publication of FI53331BpublicationCriticalpatent/FI53331B/fi
Application grantedgrantedCritical
Publication of FI53331CpublicationCriticalpatent/FI53331C/en
D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
D21C3/00—Pulping cellulose-containing materials
D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
FI339368A1968-02-161968-11-28
FORM OF CELLULOSE FUER
FI53331C
(en)