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IG Farbenindustrie AG
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IG Farbenindustrie AG
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Application filed by IG Farbenindustrie AGfiledCriticalIG Farbenindustrie AG
Application grantedgrantedCritical
Publication of FR623702ApublicationCriticalpatent/FR623702A/fr
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
FR623702D1925-11-271926-10-26Procédé de fabrication de cellulose pratiquement dépourvue de lignine par traitement au sulfite
ExpiredFR623702A
(fr)
Procédé pour le traitement de lessive obtenue dans la fabrication de la cellulose par cuisson avec une solution de sulfite de soude et de bisulfite de soude