SE312971BSE173765ASE173765ASE312971BSE 312971 BSE312971 BSE 312971BSE 173765 ASE173765 ASE 173765ASE 173765 ASE173765 ASE 173765ASE 312971 BSE312971 BSE 312971B
Authority
SE
Sweden
Application number
SE173765A
Inventor
R Berthier
Original Assignee
Cellulose Du Pin Sa
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 Cellulose Du Pin SafiledCriticalCellulose Du Pin Sa
Publication of SE312971BpublicationCriticalpatent/SE312971B/xx
D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
D21C9/10—Bleaching ; Apparatus therefor
D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
D21C9/142—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively