Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lenzinger Zellwolle- und Papierfabrik AG
Zellwolle und Kunstseide Ring GmbH
Original Assignee
Lenzinger Zellwolle- und Papierfabrik AG
Zellwolle und Kunstseide Ring GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lenzinger Zellwolle- und Papierfabrik AG, Zellwolle und Kunstseide Ring GmbHfiledCriticalLenzinger Zellwolle- und Papierfabrik AG
Application grantedgrantedCritical
Publication of FR902709ApublicationCriticalpatent/FR902709A/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
D21C3/12—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites sodium bisulfite
FR902709D1943-02-221944-03-14Procédé pour l'obtention de la cellulose à partir de matières premières qui en contiennent
ExpiredFR902709A
(fr)