ClassID:

126405

D21C9/1057 - 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; Bleaching ; Apparatus therefor Multistage, with compounds cited in more than one sub-group , ,

Recent Application in this class:
#1
20230392320
2023-12-07

METHOD FOR BLEACHING PULP FROM RECYCLED TEXTILE MATERIAL

#2
20230349098
2023-11-02

SHORT-SEQUENCE ECF BLEACHING PROCESS X/Z/D-EOP-D OR X/D/Z-EOP-D FOR KRAFT WOOD PULP

#3
20230203751
2023-06-29

PROCESS AND APPARATUS FOR PRODUCING BLEACHED CELLULOSE

#4
20230167604
2023-06-01

High efficiency fiber bleaching process

#5
20220213648
2022-07-07

Oxygen treatment of high kappa fibers

#6
20210355635
2021-11-18

Dissolving wood pulps and methods of making and using the same

#7
20210254280
2021-08-19

Method for producing bleached wood fibre material

#8
20210079594
2021-03-18

High efficiency fiber bleaching process

#9
20210062420
2021-03-04

Method for preparing dissolving pulp by TCF bleaching of poplar KP

#10
20210062419
2021-03-04

Method For Preparing Dissolving Pulp By Totally Chlorine-Free Bleaching Of Poplar Kraft Pulp

#11
20200181839
2020-06-11

Low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same

#12
20190345672
2019-11-14

Method for bleaching paper pulp

#13
20190264388
2019-08-29

Dissolving wood pulps and methods of making and using the same

#14
20190112759
2019-04-18

SELECTIVE REMOVAL OF K+ AND CL- FROM RECOVERY BOILER ELECTROSTATIC PRECIPITATOR ASHES IN A KRAFT PROCESS

#15
20180312610
2018-11-01

Cellulose composite materials and methods of making and using the same

#16
20180266051
2018-09-20

Low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same

#17
20180245285
2018-08-30

METHODS OF PRODUCING A PAPER PRODUCT

#18
20180216292
2018-08-02

Method for producing bleached wood fibre material

#19
20180135245
2018-05-17

Modified cellulose from chemical fiber and methods of making and using the same

#20
20180127919
2018-05-10

Process for producing increased bulk pulp fibers, pulp fibers obtained, and products incorporating same

#21
20180119346
2018-05-03

Method of making bleached microcrystalline cellulose

#22
20170335515
2017-11-23

Methods of pulp fiber treatment

#23
20170306557
2017-10-26

Methods of producing a paper product

#24
20170198439
2017-07-13

Use of surfactant to treat pulp and improve the incorporation of kraft pulp into fiber for the production of viscose and other secondary fiber products

#25
20160298294
2016-10-13

Method for delignifying and bleaching pulp

#26
20160168791
2016-06-16

Methods of producing a paper product

#27
20150136344
2015-05-21

Product and processes from an integrated forest biorefinery

#28
20150126728
2015-05-07

Use of surfactant to treat pulp and improve the incorporation of kraft pulp into fiber for the production of viscose and other secondary fiber products

#29
20140371442
2014-12-18

Low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same

#30
20140182796
2014-07-03

Product and processes from an integrated forest biorefinery

#31
20120279669
2012-11-08

Method of treating liquid flows at a chemical pulp mill

#32
20120067532
2012-03-22

High brightness pulps from lignin rich waste papers

#33
20080196848
2008-08-21

Apparatus and method for washing pulps

#34
20080087390
2008-04-17

MULTI-STEP PULP BLEACHING

#35
20070199668
2007-08-30

Treatment of cellulose during bleaching with agent capable of reducing carbonyl groups

#36
20070151680
2007-07-05

Treatment of cellulose during bleaching with agent capable of reducing carbonyl groups

#37
20070079944
2007-04-12

Product and processes from an integrated forest biorefinery

#38
20070051483
2007-03-08

Process for Bleaching Kraft Pulp

#39
20060249265
2006-11-09

Treatment of cellulose during bleaching with agent capable of reducing carbonyl groups

#40
20060113048
2006-06-01

Method for washing pulp in a bleaching line and a bleaching line

#41
20060090866
2006-05-04

Method for washing pulp in a bleaching line

#42
20060090865
2006-05-04

Method of bleaching cellulose pulp and bleaching line therefore

#43
20050279467
2005-12-22

Process for high temperature peroxide bleaching of pulp with cool discharge

#44
20050133173
2005-06-23

Process for bleaching Kraft pulp

#45
20050051288
2005-03-10

Extended retention and medium consistency pulp treatment

#46
20050022951
2005-02-03

Total chlorine free bleaching of arundo donax pulp