D21C9/00 - CPC Classification Index

ClassID:

126381 ⎘

D21C9/00 - CPC Classification

Classification description:

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

Sub-classes:

D21C9/001 » {Modification of pulp properties } 94
D21C9/008 » {Prevention of corrosion or formation of deposits on pulp-treating equipment } 17
D21C9/02 » Washing; {Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents} 121
D21C9/08 » Removal of fats, resins, pitch or waxes; {Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching } 82
D21C9/10 » Bleaching; {Apparatus therefor} 155
D21C9/18 » De-watering 151

Recent Application in this class:

20260009179

2026-01-08

UNMODIFIED CELLULOSE BEADS AND PRODUCTION METHOD THEREFOR

20250250592

2025-08-07

HYDROTHERMAL-MECHANICAL CONVERSION OF LIGNOCELLULOSIC BIOMASS TO ETHANOL OR OTHER FERMENTATION PRODUCTS

20230009849

2023-01-12

ODOR CONTROL PULP COMPOSITION

20220243229

2022-08-04

Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products

20210332153

2021-10-28

Manufacture of nanocellulose and intermediates thereof

20210131038

2021-05-06

MODIFIED FIBER, METHODS, AND SYSTEMS

20200385928

2020-12-10

Odor control pulp composition

20200376718

2020-12-03

Recycled pulp, absorbent, non-woven fabric, and sanitary article

20200318289

2020-10-08

Inline dilution of microfibrillated cellulose

#10

20200172939

2020-06-04

Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products

#11

20200102701

2020-04-02

Method of directed fouling of a substance onto a selected surface

#12

20190360006

2019-11-28

Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products

#13

20190271112

2019-09-05

Method for lignin depolymerisation

#14

20190211502

2019-07-11

Process for manufacturing recycled pulp from used sanitary goods

#15

20180291119

2018-10-11

Manufacture of nanocellulose and intermediates thereof

#16

20180274172

2018-09-27

Odor control pulp composition

#17

20180258589

2018-09-13

Modified fiber, methods, and systems

#18

20180237806

2018-08-23

Hydrothermal-mechanical conversion of lignocellulosic biomass to ethanol or other fermentation products

#19

20180119346

2018-05-03

Method of making bleached microcrystalline cellulose

#20

20180023251

2018-01-25

Method of directed fouling of a substance onto a selected surface

#21

20170350072

2017-12-07

Enzymatic process combined with hot caustic extraction for the removal of hemicelluloses from paper-grade pulp

#22

20170342659

2017-11-30

Method and apparatus for controlling a cellulosic pulp process

#23

20170320969

2017-11-09

Method for manufacturing microfibrillated polysaccharide

#24

20170305037

2017-10-26

Method for manufacturing recycled pulp from used sanitary article

#25

20170298152

2017-10-19

Method of processing and fractionating biomass and use of fractions thus obtained

#26

20170284023

2017-10-05

PROCESS FOR PRETREATING RECLAIMED COTTON FIBERS TO BE USED IN THE PRODUCTION OF MOLDED BODIES FROM REGENERATED CELLULOSE

#27

20170121913

2017-05-04

Process for producing at least one ply of a paper or paperboard product and a paper or paperboard product

#28

20170021327

2017-01-26

METHODS AND SYSTEMS FOR PROCESSING LIGNIN THROUGH VISCOSITY REDUCTION DURING HYDROTHERMAL DIGESTION OF CELLULOSIC BIOMASS SOLIDS

#29

20160369454

2016-12-22

Modified fiber, methods, and systems

#30

20160289150

2016-10-06

Catalytic biomass conversion methods, catalysts, and methods of making the same

#31

20160244788

2016-08-25

HYDROTHERMAL-MECHANICAL CONVERSION OF LIGNOCELLULOSIC BIOMASS TO ETHANOL OR OTHER FERMENTATION PRODUCTS

#32

20160237619

2016-08-18

Process for pretreating reclaimed cotton fibers to be used in the production of molded bodies from regenerated cellulose

#33

20160237617

2016-08-18

Process for manufacturing recycled pulp from used sanitary goods

#34

20160032021

2016-02-04

Method of producing regenerated cellulose and hemicellulose

#35

20150376347

2015-12-31

Modified fiber, methods, and systems

#36

20150322171

2015-11-12

Method for catalytic oxidation of cellulose and method for making a cellulose product

#37

20140369156

2014-12-18

Mixing unit for use in a mixing apparatus and a mixing apparatus

#38

20140349835

2014-11-27

Compositions and particles containing cellulosic fibers and stabilized-and/or activated-urease inhibitors, as well as methods of making and using the same

#39

20140326323

2014-11-06

Apparatus and method for introducing a first fluid into the flow path of a second fluid and use of such an apparatus

#40

20140302336

2014-10-09

Process for producing a dispersion comprising nanoparticles and a dispersion produced according to the process

#41

20140041821

2014-02-13

Method for dry spinning neutral and anionically modified cellulose and fibres made using the method

#42

20130081768

2013-04-04

Catalytic carboxylation of cellulose fibers in a continuous process with multiple additions of catalyst, secondary oxidant and base to a moving slurry of cellulose fibers

#43