D
TEXTILES; PAPER
D
TEXTILES; PAPER
D21
PAPER-MAKING; PRODUCTION OF CELLULOSE
D21
PAPER-MAKING; PRODUCTION OF CELLULOSE
D21C
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
D21C
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
9/00
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
9/00
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
D21C9/10
Bleaching; ; Apparatus therefor
D21C9/12
with halogens or halogen-containing compounds
D21C9/12
with halogens or halogen-containing compounds
D21C9/14
with ClO2 or chlorites
D21C9/14
with ClO2 or chlorites
D21C9/144
with ClO2/Cl2 and other bleaching agents in a multistage process
D21C9/144
with ClO2/Cl2 and other bleaching agents in a multistage process