ClassID:

126402

D21C9/1042 - 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; Other features in bleaching processes Use of chelating agents

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

METHOD FOR BLEACHING PULP FROM RECYCLED TEXTILE MATERIAL

#2
20220267957
2022-08-25

METHOD FOR MANUFACTURING BLEACHED PULP, FEEDSTOCK, AND PACKAGING SYSTEM

#3
20210062420
2021-03-04

Method for preparing dissolving pulp by TCF bleaching of poplar KP

#4
20210062419
2021-03-04

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

#5
20200223786
2020-07-16

Process for the Preparation of a Mixture of Chelating Agents, Mixture of Chelating Agents and Methods of Using Them

#6
20200181063
2020-06-11

Process for the preparation of a mixture of chelating agents, mixture of chelating agents and methods of using them

#7
20190345672
2019-11-14

Method for bleaching paper pulp

#8
20180186634
2018-07-05

Oxidative method

#9
20180155871
2018-06-07

METHODS FOR BLEACHING AQUEOUS PULPS AND COMPOSITIONS FOR USE IN THESE METHODS

#10
20180094384
2018-04-05

Oxidative method

#11
20170335515
2017-11-23

Methods of pulp fiber treatment

#12
20170335512
2017-11-23

Process for individualizing trichomes

#13
20160298294
2016-10-13

Method for delignifying and bleaching pulp

#14
20140259458
2014-09-18

Processes and compositions for brightness improvement in paper production

#15
20140083633
2014-03-27

Chemical treatment of lignocellulosic fiber bundle material, and methods and systems relating thereto

#16
20130206350
2013-08-15

Method for improving brightness in bleached pulp

#17
20130126109
2013-05-23

Silicate Free Refiner Bleaching

#18
20130062026
2013-03-14

Process for producing bleached pulp

#19
20120318750
2012-12-20

METHODS AND COMPOSITIONS FOR COMPLEX BINDING OF METAL IONS

#20
20120211185
2012-08-23

Compositions and processes for paper

#21
20120077726
2012-03-29

GENTLE BLEACHING AGENT

#22
20120061043
2012-03-15

Process for the bleaching of mechanical paper pulp

#23
20110303372
2011-12-15

Process for reducing specific energy demand during refining of thermomechanical and chemi-thermomechanical pulp

#24
20110094043
2011-04-28

Method of synthesis of tetradentate amide macrocycle ligand and its metal-complex

#25
20110067831
2011-03-24

Process for the bleaching of paper pulp

#26
20100236734
2010-09-23

Process for bleaching pulp

#27
20100224336
2010-09-09

PROCESS OF BLEACHING A WOOD PULP

#28
20100224333
2010-09-09

METHOD AND CHEMICAL COMPOSITION TO IMPROVE EFFICIENCY OF MECHANICAL PULP

#29
20100191012
2010-07-29

Solid detergent composition

#30
20100183533
2010-07-22

Detergent composition

#31
20100163193
2010-07-01

Process for the bleaching of mechanical paper pulp

#32
20100101743
2010-04-29

Process for the bleaching of paper pulp

#33
20100101029
2010-04-29

Bleaching of substrates

#34
20090277596
2009-11-12

Bleaching process of chemical pulp

#35
20090242152
2009-10-01

Bleaching process of chemical pulp

#36
20090205795
2009-08-20

Combined process of peroxide bleaching of wood pulps and addition of optical brightening agents

#37
20090183845
2009-07-23

Process for producing bleached pulp

#38
20090126121
2009-05-21

Bleaching of substrates

#39
20090032207
2009-02-05

Process for producing mechanical pulp suitable for paper or cardboard making

#40
20090008049
2009-01-08

NON-SCALING CHIP CONDITIONING SYSTEM FOR ENERGY REDUCTION IN MECHANICAL PULPING

#41
20080264584
2008-10-30

Composition and process for the treatment of fibre material

#42
20080110584
2008-05-15

Bleaching process with at least one extraction stage

#43
20080035287
2008-02-14

Process for the treatment of fibre material and new composition

#44
20080035286
2008-02-14

Processes and systems for the pulping of lignocellulosic materials

#45
20070131365
2007-06-14

Method of brightness enhancement

#46
20070131364
2007-06-14

Process for treating a cellulose-lignin pulp

#47
20070062653
2007-03-22

Methods for enhancing brightness and resistance to thermal yellowing of bleached kraft pulp and paper

#48
20060144534
2006-07-06

Bleaching of cellulosic fibre material with peroxide using polymers as a stabiliser

#49
20060081346
2006-04-20

Peroxide bleaching of wood pulp

#50
20050279467
2005-12-22

Process for high temperature peroxide bleaching of pulp with cool discharge

#51
20050217813
2005-10-06

Methods to enhance brightness of pulp and optimize use of bleaching chemicals

#52
20050194111
2005-09-08

Methods to enhance pulp bleaching and delignification

#53
20050045291
2005-03-03

Reduction of organically bound chlorine formed in chlorine dioxide bleaching