Patents-Review.com
ClassID:

126348 ⎘

D21C3/06 - CPC Classification

Classification description:

Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites

Sub-classes:
Recent Application in this class:
#1
20250340673
2025-11-06

PROCESSES AND APPARATUS FOR PRODUCING NANOCELLULOSE, AND COMPOSITIONS AND PRODUCTS PRODUCED THEREFROM

 #2
20250283255
2025-09-11

METHOD FOR MAKING FIBRES

 #3
20250270760
2025-08-28

MODIFIED ALKANESULFONIC ACID AND USES THEREOF

 #4
20250257527
2025-08-14

SULFITE-BASED PROCESSES FOR PRODUCING NANOCELLULOSE, AND COMPOSITIONS AND PRODUCTS PRODUCED THEREFROM

 #5
20250137201
2025-05-01

ANTI-MYOPIA PAPER SHEET

 #6
20250059707
2025-02-20

NANOCELLULOSE PRODUCTION CO-LOCATED AT A PULP AND PAPER MILL

 #7
20250052002
2025-02-13

OPTIMIZATION OF CHEMICAL CONSUMPTION IN BIOMASS DELIGNIFICATION

 #8
20240247081
2024-07-25

PROCESSES AND APPARATUS FOR PRODUCING NANOCELLULOSE, AND COMPOSITIONS AND PRODUCTS PRODUCED THEREFROM

 #9
20230265612
2023-08-24

A COOKING METHOD

 #10
20230265611
2023-08-24

A HIGH YIELD COOKING METHOD

 #11
20230265610
2023-08-24

METHOD TO TREAT A CONDENSATE IN A PULPING PROCESS

 #12
20230220623
2023-07-13

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

 #13
20220267956
2022-08-25

Arylsulfonic acid—modified sulfuric acid and uses thereof

 #14
20220243399
2022-08-04

Common preparation of lignocellulosic feedstock and a product containing cellulose but free from lignin

 #15
20220090155
2022-03-24

CHEMICALLY MODIFIED LIGNIN AS REDUCING AGENT FOR ENZYMATIC HYDROLYSIS OF LIGNOCELLULOSIC BIOMASS

 #16
20220034038
2022-02-03

Sulfite-based processes for producing nanocellulose, and compositions and products produced therefrom

 #17
20210372048
2021-12-02

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

 #18
20210340706
2021-11-04

Nanocellulose production co-located at a pulp and paper mill

 #19
20210284757
2021-09-16

Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom

 #20
20210277151
2021-09-09

Processes for producing nanocellulose, and nanocellulose compositions produced therefrom

 #21
20210269971
2021-09-02

Modified alkanesulfonic acid and uses thereof

 #22
20210221919
2021-07-22

Nanolignocellulose compositions and processes to produce these compositions

 #23
20210148009
2021-05-20

DEGUMMING AND SCOURING OF BAST MATERIAL FOR PRODUCTION OF TEXTILE AND PULP-QUALITY FIBER

 #24
20210139519
2021-05-13

Process for the production of cellulose, lignocellulosic sugars, lignosulfonate, and ethanol

 #25
20190271114
2019-09-05

SULFITE-BASED PROCESSES FOR PRODUCING NANOCELLULOSE, AND COMPOSITIONS AND PRODUCTS PRODUCED THEREFROM

 #26
20190226142
2019-07-25

Method for improved pulping using an environmentally friendly pulping aid

 #27
20190127911
2019-05-02

Drying/transportation and releasing MFC

 #28
20190100604
2019-04-04

Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom

 #29
20180298113
2018-10-18

NANOLIGNOCELLULOSE COMPOSITIONS AND PROCESSES TO PRODUCE THESE COMPOSITIONS

 #30
20180251941
2018-09-06

NANOCELLULOSE PRODUCTION CO-LOCATED AT A PULP AND PAPER MILL

 #31
20180127919
2018-05-10

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

 #32
20180037863
2018-02-08

Sulfur dioxide and/or sulfurous acid pretreatment with sulfur dioxide recovery

 #33
20170210827
2017-07-27

Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom

 #34
20170210826
2017-07-27

PROCESSES FOR PRODUCING NANOCELLULOSE, AND NANOCELLULOSE COMPOSITIONS PRODUCED THEREFROM

 #35
20170107665
2017-04-20

Continuous process for production of cellulose pulp from grass-like plant feedstock

 #36
20160362353
2016-12-15

INTEGRATED PROCESS FOR PRODUCING CELLULOSIC PULP AND POLYOLS STREAM

 #37
20160289893
2016-10-06

Nanocellulose

 #38
20160281298
2016-09-29

SULFITE-BASED PROCESSES FOR PRODUCING NANOCELLULOSE, AND COMPOSITIONS AND PRODUCTS PRODUCED THEREFROM

 #39
20160244913
2016-08-25

METHOD FOR PRODUCING CELLULOSE

 #40
20160237173
2016-08-18

NANOCELLULOSE PRODUCTION USING LIGNOSULFONIC ACID

 #41
20160215449
2016-07-28

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

 #42
20150275432
2015-10-01

Integration of non-woody biorefining at pulp and paper plants

 #43
20150259709
2015-09-17

PROCESSES FOR PRODUCING FLUFF PULP AND ETHANOL FROM SUGARCANE

 #44
20150204017
2015-07-23

Nanocellulose production using lignosulfonic acid

 #45
20150184345
2015-07-02

Sulfite-based processes for producing nanocellulose, and compositions and products produced therefrom

 #46
20140295509
2014-10-02

Pre-treatment of cellulosic material

 #47
20140186899
2014-07-03

Biomass fractionation processes employing sulfur dioxide

 #48
20140170713
2014-06-19

BIOMASS FRACTIONATION PROCESSES, APPARATUS, AND PRODUCTS PRODUCED THEREFROM

 #49
20140158315
2014-06-12

Use of sodium dithionite in pulping

 #50
20140154757
2014-06-05

Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom

 #51
20140154756
2014-06-05

Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom

 #52
20140106426
2014-04-17

Separation of lignin from hydrolyzate

 #53
20140073016
2014-03-13

Treatment of biomass to dissolve lignin with ionic liquid composition

 #54
20140004582
2014-01-02

Conditioning of SO2-ethanol-water spent liquor for fermentation by clostridia

 #55
20130143289
2013-06-06

Pre-treatment of cellulosic material

 #56
20120237989
2012-09-20

SEPARATION OF LIGNIN FROM HYDROLYZATE

 #57
20120073772
2012-03-29

GASIFICATION OF SULPHITE THICK LIQUOR

 #58
20110250638
2011-10-13

Lignocellulosic biomass conversion

 #59
20110165643
2011-07-07

Separation of lignin from hydrolyzate

 #60
20110124056
2011-05-26

Pretreatment of Ligno-Cellulosic Biomass with Sulfonation

 #61
20100132898
2010-06-03

Process for the production of bleached wood particles and pale to white wood-base materials

 #62
20100032111
2010-02-11

Process for producing fibrous material from wood

 #63
20090266500
2009-10-29

PROCESS FOR PRODUCING TISSUE PAPER

 #64
20090229774
2009-09-17

Lignocellulosic fibrous material made of wood

 #65
20060199881
2006-09-07

Biodegradable composition for the preparation of tableware, drink container, mulching film and package and method for preparing the same