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Pulping cellulose-containing materials
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Industry
CPC
D21C3/00
This industry / category may be too specific. Please go to a parent level for more data
Parent Industries
D
TEXTILES PAPER
D21
Papermaking
D21C
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS APPARATUS THEREFOR
Current Industry
D21C3/00
Pulping cellulose-containing materials
Sub Industries
D21C3/003
with organic compounds
D21C3/006
with compounds not otherwise provided for
D21C3/02
with inorganic bases or alkaline reacting compounds
D21C3/022
in presence of S-containing compounds
D21C3/024
with NH3 or H2O
D21C3/026
in presence of O2
D21C3/028
in presence of O3
D21C3/04
with acids, acid salts or acid anhydrides
D21C3/045
in presence of O2 or O3
D21C3/06
sulfur dioxide sulfurous acid bisulfites sulfites
D21C3/08
calcium bisulfite
D21C3/10
magnesium bisulfite
D21C3/12
sodium bisulfite
D21C3/14
ammonium bisulfite
D21C3/16
nitrogen oxides nitric acid nitrates, nitrites
D21C3/18
with halogens or halogen-generating compounds
D21C3/20
with organic solvents or in solvent environment
D21C3/22
Other features of pulping processes
D21C3/222
Use of compounds accelerating the pulping processes
D21C3/224
Use of means other than pressure and temperature
D21C3/226
Use of compounds avoiding scale formation
D21C3/228
Automation of the pulping processes
D21C3/24
Continuous processes
D21C3/26
Multistage processes
D21C3/263
at least one stage being in presence of oxygen
D21C3/266
the same pulping agent being used in all stages
D21C3/28
Prevention of foam
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