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.)
MacMillan Bloedel Ltd
Original Assignee
MacMillan Bloedel Ltd
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
Priority claimed from US00362009Aexternal-prioritypatent/US3841962A/en
Application filed by MacMillan Bloedel LtdfiledCriticalMacMillan Bloedel Ltd
Publication of FR2194840A1publicationCriticalpatent/FR2194840A1/fr
Application grantedgrantedCritical
Publication of FR2194840B1publicationCriticalpatent/FR2194840B1/fr
D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
D21C1/00—Pretreatment of the finely-divided materials before digesting
D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds
FR7327715A1972-07-311973-07-27Hydrogen sulphide treatment of lignocellulosic materials - prior to alkaline digestion in pulp prodn. to eliminate loss of sulphur
GrantedFR2194840A1
(en)