ClassID:

126357

D21C3/222 - CPC Classification

Classification description:

Pulping cellulose-containing materials; Other features of pulping processes Use of compounds accelerating the pulping processes

Recent Application in this class:
#1
20250389084
2025-12-25

METHOD FOR PREPARING PULP WITH RELATIVELY HIGH BRIGHTNESS AND HIGH-ACTIVITY LIGNIN

#2
20250389083
2025-12-25

DIGESTION ACCELERATOR AND METHOD FOR PRODUCING PULP USING SAME

#3
20250341054
2025-11-06

EFFICIENT METHODS AND COMPOSITIONS FOR RECOVERY OF PRODUCTS FROM ORGANIC ACID PRETREATMENT OF PLANT MATERIALS

#4
20250333905
2025-10-30

PROCESS FOR INCREASING DIGESTION EFFICIENCY OF LIGNOCELLULOSIC MATERIAL IN A TREATMENT VESSEL

#5
20250215642
2025-07-03

EFFICIENT METHODS AND COMPOSITIONS FOR RECOVERY OF PRODUCTS FROM ORGANIC ACID PRETREATMENT OF PLANT MATERIALS

#6
20250146219
2025-05-08

HIGH BRIGHTNESS NON-WOOD PULP

#7
20250146217
2025-05-08

EFFICIENT METHODS AND COMPOSITIONS FOR RECOVERY OF PRODUCTS FROM ORGANIC ACID PRETREATMENT OF PLANT MATERIALS

#8
20250075425
2025-03-06

PROCESSES FOR FRACTIONATION OF BIOMASS

#9
20250052002
2025-02-13

OPTIMIZATION OF CHEMICAL CONSUMPTION IN BIOMASS DELIGNIFICATION

#10
20250012010
2025-01-09

NON-WOOD PULP HAVING HIGH BRIGHTNESS AND LOW DEBRIS

#11
20240175205
2024-05-30

METHOD FOR DIGESTING LIGNOCELLULOSIC MATERIAL

#12
20240116835
2024-04-11

LIGNOCELLULOSE REFINERY

#13
20240084507
2024-03-14

Juncao pulp for spinning and preparation method and use thereof

#14
20240052566
2024-02-15

Optimization Of Chemical Consumption in Biomass Delignification

#15
20240018723
2024-01-18

Non-wood pulp having high brightness and low debris

#16
20230407562
2023-12-21

High brightness non-wood pulp

#17
20230323597
2023-10-12

Method for separating biomass components by ternary system

#18
20230313456
2023-10-05

PROCESS AND APPARATUS FOR WHITE LIQUOR OXIDATION

#19
20230265611
2023-08-24

A HIGH YIELD COOKING METHOD

#20
20230220623
2023-07-13

METHOD FOR CO-PRODUCING MOLDED FOOD-CONTAINER PULP AND FULVIC ACID FROM COTTON STALK

#21
20230160140
2023-05-25

PROCESS FOR INCREASING DIGESTION EFFICIENCY OF LIGNOCELLULOSIC MATERIAL IN A TREATMENT VESSEL

#22
20230061654
2023-03-02

COOKING ACCELERATOR FOR LIGNOCELLULOSE MATERIALS AND METHOD FOR PRODUCING PULP USING SAME

#23
20230046123
2023-02-16

Process for producing refined cotton with high polymerization degree

#24
20220049420
2022-02-17

Efficient methods and compositions for recovery of products from organic acid pretreatment of plant materials

#25
20210372048
2021-12-02

Dual surfactant digester additive composition and a method for enhancing the pulping of wood chips using the same

#26
20200399722
2020-12-24

CO-SOLVENT TO PRODUCE REACTIVE INTERMEDIATES FROM BIOMASS

#27
20200339761
2020-10-29

Lignocellulosic biomass treatment method

#28
20200181838
2020-06-11

Method of producing chemical pulp

#29
20200173112
2020-06-04

Methods of making paper and paper with modified cellulose pulps

#30
20200123707
2020-04-23

Method of increasing the throughput and/or decreasing energy usage of a pulping process

#31
20190376236
2019-12-12

Method to convert mechanical pulp derived waste material into value added cellulose products

#32
20190309471
2019-10-10

DEFIBRATOR WITH SEPARATED BLOW VALVE

#33
20190112757
2019-04-18

Phenols as additives in kraft pulping

#34
20190078258
2019-03-14

Method for enhanced oxygen delignification of chemical wood pulps

#35
20190031797
2019-01-31

Ionic polymers and use thereof in processing of biomass

#36
20180245285
2018-08-30

METHODS OF PRODUCING A PAPER PRODUCT

#37
20180163344
2018-06-14

Method for reducing pulp viscosity in production of dissolving pulp

#38
20180073197
2018-03-15

Methods of making paper and paper with modified cellulose pulps

#39
20170362773
2017-12-21

Refiner plate segment with pre-dam

#40
20170306557
2017-10-26

Methods of producing a paper product

#41
20170204566
2017-07-20

Methods of making paper and paper with modified cellulose pulps

#42
20170137579
2017-05-18

Treatment of lignocellulosic biomass with aromatic chemicals as scavengers

#43
20170136449
2017-05-18

NOVEL SUPPORTED ANTHRAQUINONIC CATALYSTS AND USES OF SAME FOR KRAFT COOKING

#44
20170016179
2017-01-19

CATALYTIC BIOMASS CONVERSION

#45
20160362834
2016-12-15

Papermaking additive compositions and methods and uses thereof

#46
20160326204
2016-11-10

PROCESS FOR PREPARING NON-PYROLYTIC BIO-OIL FROM LIGNOCELLULOSIC MATERIALS

#47
20160289150
2016-10-06

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

#48
20160222586
2016-08-04

Processes for producing cellulose pulp and pulp-derived products from lignocellulosic biomass

#49
20160215449
2016-07-28

Cross-linked glycerol based polymers as digestion aids for improving wood pulping processes

#50
20160168791
2016-06-16

Methods of producing a paper product

#51
20160097000
2016-04-07

Methods and systems for processing cellulosic biomass

#52
20160096999
2016-04-07

Methods and systems for processing cellulosic biomass

#53
20160096995
2016-04-07

Methods and systems for processing cellulosic biomass

#54
20160076112
2016-03-17

Co-solvent to produce reactive intermediates from biomass

#55
20150315750
2015-11-05

Methods of making paper and paper with modified cellulose pulps

#56
20150211188
2015-07-30

High yield and enhanced performance fiber

#57
20150136344
2015-05-21

Product and processes from an integrated forest biorefinery

#58
20150007809
2015-01-08

Method of digesting lignocellulosic material

#59
20140312270
2014-10-23

Use of carbonium ion scavengers in the treatment of lignocellulosic biomass

#60
20140275515
2014-09-18

Methods for digestion of cellulosic biomass solids in the presence of a phenolic solvent generated in situ from lignin

#61
20140275513
2014-09-18

Methods for digestion of cellulosic biomass solids in the presence of a phenolic solvent generated in situ from lignin

#62
20140200335
2014-07-17

Catalytic biomass conversion

#63
20140182796
2014-07-03

Product and processes from an integrated forest biorefinery

#64
20140166220
2014-06-19

Method to produce high-resistance cellulose and hemicellulose fibers from lignocellulosic biomass of sugarcane leaves and buds

#65
20140158315
2014-06-12

Use of sodium dithionite in pulping

#66
20140117276
2014-05-01

Methods and systems for distributing a slurry catalyst in cellulosic biomass solids

#67
20140096922
2014-04-10

Processes for producing cellulose pulp, sugars, and co-products from lignocellulosic biomass

#68
20140005445
2014-01-02

Methods for hydrothermal digestion of cellulosic biomass solids in the presence of a slurry catalyst and a digestible filter aid

#69
20140005444
2014-01-02

Methods for hydrothermal digestion of cellulosic biomass solids in the presence of a distributed slurry catalyst

#70
20130248128
2013-09-26

Process for decomposing lignin in biomass

#71
20130228297
2013-09-05

Process for producing modified cellulose pulps, cellulose pulp thus obtained and use of biopolymer for producing cellulose pulps

#72
20130139812
2013-06-06

Method for liquefying biomass

#73
20130112359
2013-05-09

Product and processes from an integrated forest biorefinery

#74
20120325417
2012-12-27

Method of producing cellulose pulp

#75
20120305209
2012-12-06

HARDWOOD ALKALINE PULPING PROCESSES AND SYSTEMS

#76
20120132379
2012-05-31

Method for obtaining cellulose from biomass comprising lignocellulose

#77
20120107887
2012-05-03

Process for the production of alcohols from biomass

#78
20110297343
2011-12-08

Raw Paper

#79
20110296748
2011-12-08

METHODS FOR THE MANUFACTURE OF FUEL PELLETS AND OTHER PRODUCTS FROM LIGNOCELLULOSIC BIOMASS

#80
20110220307
2011-09-15

Lipohydrophilic glycerol based polymers as digestion aids for improving wood pulping processes

#81
20110155335
2011-06-30

USE OF POLYSULFIDE IN MODIFIED COOKING

#82
20110114273
2011-05-19

Environmentally benign TCF bleaching sequences for AS/AQ wheat straw pulp

#83
20110105737
2011-05-05

METHOD FOR PRETREATING PLANT STARTING MATERIAL FOR THE PRODUCTION, FROM SACCHARIFEROUS AND LIGNOCELLULOSIC RESOURCES, OF BIOETHANOL AND OF SUGAR, AND PLANT

#84
20110094692
2011-04-28

Methods of pretreating comminuted cellulosic material with carbonate-containing solutions

#85
20110061825
2011-03-17

Method for preparing a grass-type unbleached paper product

#86
20100285550
2010-11-11

Delignification of Lignocellulose-Containing Material

#87
20100269990
2010-10-28

Separation of reactive cellulose from lignocellulosic biomass with high lignin content

#88
20100190973
2010-07-29

SINGLE STEP PROCESS FOR SEPARATING BIOMASS COMPONENTS

#89
20100186912
2010-07-29

PULP PRODUCTION

#90
20090314443
2009-12-24

METHOD FOR PRODUCING FIBROUS MATERIAL

#91
20090126883
2009-05-21

Use of polysulfide in modified cooking

#92
20090032208
2009-02-05

Processes and systems for the bleaching of lignocellulosic pulps following cooking with soda and anthraquinone

#93
20090014138
2009-01-15

Production of pulp using a gaseous organic agent as heating and reaction-accelerating media

#94
20080295982
2008-12-04

Process for Producing Fiber Pulp Utilizing Bamboo and Pulp Produced Using the Same

#95
20070284068
2007-12-13

METHODS FOR CARBONATE PRETREATMENT AND PULPING OF CELLULOSIC MATERIAL

#96
20070256801
2007-11-08

Alkaline Process and System for Producing Pulp

#97
20070240837
2007-10-18

Hardwood alkaline pulping processes and systems

#98
20070079944
2007-04-12

Product and processes from an integrated forest biorefinery

#99
20060175029
2006-08-10

Batch process for preparing pulp

#100
20060151135
2006-07-13

Method to determine pulping yield

#101
20060144533
2006-07-06

Method for the production of improved pulp

#102
20060102300
2006-05-18

Alkaline process for the manufacturing of pulp using alkali metaborate as buffering alkali

#103
20060060315
2006-03-23

Catalyzer for clean pulping and process for using the same

#104
20050269048
2005-12-08

Catalytic reactor process for the production of commercial grade pulp, native lignin and unicellular protein

#105
20050155730
2005-07-21

Method for the production of high yield chemical pulp from softwood

#106
20050115692
2005-06-02

Method for the production of improved pulp

#107
20050115691
2005-06-02

Cooking of cellulose pulp in a cooking liquor containing pre-evaporated black liquor

#108
20050098280
2005-05-12

Alkaline process for the manufacturing of pulp using alkali metaborate as buffering alkali