ClassID:

126342

D21C3/022 - CPC Classification

Classification description:

Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing compounds

Recent Application in this class:
#1
20260139435
2026-05-21

HEMP PAPER PACKAGING MATERIAL FOR FOODSTUFF

#2
20260055552
2026-02-26

EXTRACTION OF DELIGNIFIED, CELLULOSE-BASED FIBERS FROM NATURAL PLANT MATERIAL, AND MATERIALS INCORPORATING SUCH FIBERS

#3
20260043196
2026-02-12

METHOD FOR PROCESSING BLACK LIQUOR IN PULP PRODUCTION

#4
20250389083
2025-12-25

DIGESTION ACCELERATOR AND METHOD FOR PRODUCING PULP USING SAME

#5
20250207325
2025-06-26

BIOMASS DELIGNIFICATION

#6
20250163643
2025-05-22

APPARATUSES, METHODS AND SYSTEMS FOR YIELD INCREASE IN A KRAFT COOKING PLANT

#7
20250162189
2025-05-22

STRONG AND TOUGH STRUCTURAL WOOD MATERIALS, AND METHODS FOR FABRICATING AND USE THEREOF

#8
20240426050
2024-12-26

A method, use of the same, a pulp composition, and a system

#9
20240337069
2024-10-10

HEMP PAPER PACKAGING MATERIAL FOR FOODSTUFF

#10
20240328083
2024-10-03

Method for preparing fluff pulp from bamboos and fluff pulp prepared thereby

#11
20240301622
2024-09-12

PROCESS TO OBTAIN FULLY OXIDIZED WHITE LIQUOR FOR USE IN THE FIBERLINE OF A KRAFT PULP PROCESS

#12
20240175205
2024-05-30

METHOD FOR DIGESTING LIGNOCELLULOSIC MATERIAL

#13
20230374730
2023-11-23

Apparatuses, methods and systems for yield increase in a kraft cooking plant

#14
20230313455
2023-10-05

PROCESS FOR PRODUCTION OF CELLULOSE NANOFIBERS FROM MISCANTHUS X. GIGANTEUS AND COMPOSITES THEREFROM

#15
20230203311
2023-06-29

EVAPORATIVE DEVICES HAVING DELIGNIFIED PLANT MATERIALS, AND SYSTEMS AND METHODS FOR FABRICATION AND USE THEREOF

#16
20230166427
2023-06-01

Strong and tough structural wood materials, and methods for fabricating and use thereof

#17
20230160141
2023-05-25

EXTRACTION OF DELIGNIFIED, CELLULOSE-BASED FIBERS FROM NATURAL PLANT MATERIAL, AND MATERIALS INCORPORATING SUCH FIBERS

#18
20230046123
2023-02-16

Process for producing refined cotton with high polymerization degree

#19
20220074139
2022-03-10

Pulping Methods, Methods for Manufacturing Paperboard, and Paperboard Structures

#20
20220040881
2022-02-10

Strong and tough structural wood materials, and methods for fabricating and use thereof

#21
20210355635
2021-11-18

Dissolving wood pulps and methods of making and using the same

#22
20210207321
2021-07-08

METHOD FOR TREATING DISSOLVING PULP

#23
20210207320
2021-07-08

Lignocellulosic composites prepared with aqueous alkaline and urea solutions in cold temperatures systems

#24
20210148009
2021-05-20

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

#25
20200318287
2020-10-08

METHOD OF PROVIDING A PAPER FIBRE COMPOSITION

#26
20200223091
2020-07-16

Strong and tough structural wood materials, and methods for fabricating and use thereof

#27
20200181838
2020-06-11

Method of producing chemical pulp

#28
20200173103
2020-06-04

METHOD FOR PRODUCING ACETATE GRADE DISSOLVING PULP FROM POPLAR RESIDUAL SLABS

#29
20190390405
2019-12-26

Methods for processing lignocellulosic material

#30
20190390404
2019-12-26

Method for manufacturing dissolving pulp

#31
20190276636
2019-09-12

Composite cellulose material obtained from coffee husks or cocoa shells, an article comprising same and a method for producing said material

#32
20190264388
2019-08-29

Dissolving wood pulps and methods of making and using the same

#33
20190226142
2019-07-25

Method for improved pulping using an environmentally friendly pulping aid

#34
20190119851
2019-04-25

Lignocellulosic composites prepared with aqueous alkaline and urea solutions in cold temperatures systems and methods

#35
20190010660
2019-01-10

Process for producing cellulose with low impurities from sugarcane bagasse

#36
20180163344
2018-06-14

Method for reducing pulp viscosity in production of dissolving pulp

#37
20180112355
2018-04-26

METHOD FOR POLYSULFIDE PRODUCTION IN A KRAFT PULP MILL

#38
20170275818
2017-09-28

Cost efficient kraft cooking method using polysulfide cooking liquor

#39
20170136449
2017-05-18

NOVEL SUPPORTED ANTHRAQUINONIC CATALYSTS AND USES OF SAME FOR KRAFT COOKING

#40
20170022663
2017-01-26

Kraft cooking method using polysulfide cooking liquor

#41
20160002853
2016-01-07

Method for recovering chemicals and by-products from high-sulphidity pulping liquors

#42
20150136346
2015-05-21

Process and a dissolving pulp manufactured by the process

#43
20150052806
2015-02-26

Method for producing levulinic acid from lignocellulosic biomass

#44
20120247696
2012-10-04

PULPING PROCESS

#45
20120168102
2012-07-05

PULPING PROCESS FOR QUALITY PROTECTION INCLUDING METHODS FOR HEMICELLULOSE EXTRACTION AND TREATMENT OF HEMICELLULOSE-EXTRACTED LIGNOCELLULOSIC MATERIALS

#46
20120067533
2012-03-22

Cooking process of lignocellulose material

#47
20110272108
2011-11-10

PROCESS FOR PRODUCING PULP AND AT LEAST ONE ORGANIC LIQUID OR LIQUEFIABLE MATERIAL OF VALUE WITH OFFGAS RECYCLING

#48
20110155335
2011-06-30

USE OF POLYSULFIDE IN MODIFIED COOKING

#49
20110067829
2011-03-24

Maintenance of sulfur concentration in Kraft pulp processes

#50
20090126883
2009-05-21

Use of polysulfide in modified cooking

#51
20070256801
2007-11-08

Alkaline Process and System for Producing Pulp

#52
18442895
2024-09-24

Method of forming glass-like sheets using date palm seeds