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Priority claimed from DE1965A0049297external-prioritypatent/DE1517153A1/de
Application filed by Aschaffenburger ZellstoffwerkefiledCriticalAschaffenburger Zellstoffwerke
Application grantedgrantedCritical
Publication of FI46191BpublicationCriticalpatent/FI46191B/fi
Publication of FI46191CpublicationCriticalpatent/FI46191C/fi
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
D21C3/10—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites magnesium bisulfite