ClassID:

30316

B01D2252/20426 - CPC Classification

Classification description:

Absorbents, i.e. solvents and liquid materials for gas absorption; Organic absorbents; Amines Secondary amines

Recent Application in this class:
#1
20260138079
2026-05-21

SYSTEMS FOR REMOVING CARBON DIOXIDE FROM A CARBON DIOXIDE CONTAINING GAS, AND RELATED METHODS

#2
20260131278
2026-05-14

Low-Energy CO2 Capture and Separation

#3
20260115687
2026-04-30

ATMOSPHERIC CARBON DIOXIDE SORBENT

#4
20260115649
2026-04-30

ACIDIC GAS-ABSORBING LIQUID AND ACIDIC GAS REDUCTION METHOD

#5
20260108846
2026-04-23

METHOD AND SYSTEM FOR CARBON CAPTURE AND UTILIZATION

#6
20260091345
2026-04-02

Methods And Compositions for Carbon Capture

#7
20250339815
2025-11-06

CO2 SORPTION WITH OXIDATION RESISTANT AMINES

#8
20250339809
2025-11-06

Acid Gas Scrubbing Methods Featuring Amine Phase Separation for Hydrogen Sulfide Capture

#9
20250296033
2025-09-25

ACID GAS REMOVAL METHOD AND ACID GAS REMOVAL SYSTEM

#10
20250288947
2025-09-18

METHOD FOR PRODUCING ACIDIC GAS ABSORBENT AND ACIDIC GAS ABSORBENT PRODUCED BY THE METHOD

#11
20250262589
2025-08-21

AMINE COMPOSITION FOR CARBON DIOXIDE SEPARATION USE

#12
20250090996
2025-03-20

ACID GAS REMOVAL METHOD, ACID GAS ABSORBENT, AND ACID GAS REMOVAL APPARATUS

#13
20250026700
2025-01-23

Combined Capture and Conversion of CO2 to Methanol in a Post Combustion Capture Solvent

#14
20240382898
2024-11-21

PROCESS AND SYSTEM FOR CAPTURE OF CARBON DIOXIDE

#15
20240367094
2024-11-07

PROCESS FOR PRODUCING A MATERIAL FOR ABSORBING CARBON DIOXIDE FROM ATMOSPHERIC AIR, MATERIAL FOR ABSORBING CARBON DIOXIDE FROM ATMOSPHERIC AIR, APPARATUS, MOTOR VEHICLE

#16
20240307817
2024-09-19

ACID GAS ABSORBENT, METHOD FOR REMOVING ACID GAS, AND ACID GAS REMOVAL APPARATUS

#17
20240100473
2024-03-28

CARBON DIOXIDE ABSORBER

#18
20240001281
2024-01-04

IMPROVED MATERIALS FOR DIRECT AIR CAPTURE AND USES THEREOF

#19
20230356145
2023-11-09

Diamine solvent system for COcapture

#20
20230321597
2023-10-12

Method and Scavenging Mixture for Removing Hydrogen Sulfide from a Gas Stream

#21
20230321591
2023-10-12

Beta-Amino Carboxylate (BAC) Solvents for Enhanced CO2 Separations

#22
20230285891
2023-09-14

LOW-COST AND HIGH-EFFICIENCY ABSORPTION-DESORPTION DECOUPLING METHOD FOR CONTAMINANT-CO2 SYNERGISTIC CAPTURE

#23
20230256381
2023-08-17

Process and system for capture of carbon dioxide

#24
20230226483
2023-07-20

Acid Gas Scrubbing Methods Featuring Amine Phase Separation for Hydrogen Sulfide Capture

#25
20230078337
2023-03-16

Methods And Compositions for Carbon Capture

#26
20230001348
2023-01-05

NON-AQUEOUS SOLVENT FOR REMOVING ACIDIC GAS FROM A PROCESS GAS STREAM FOR HIGH PRESSURE APPLICATIONS

#27
20220410063
2022-12-29

Non-aqueous solvent COcapture in rotating packed bed

#28
20220387926
2022-12-08

COMPOSITIONS AND METHODS FOR CARBON DIOXIDE CAPTURE

#29
20220355245
2022-11-10

Formic acid formation from a carbon dioxide source

#30
20220274050
2022-09-01

METHOD FOR TREATING GAS BY ADSORPTION USING THERMALLY OPTIMISED HOT FLASH SOLVENT REGENERATION

#31
20220193601
2022-06-23

ABSORBENT FOR CO2 OR H2S, OR BOTH OF CO2 AND H2S, AND DEVICE AND METHOD FOR REMOVING CO2 OR H2S, OR BOTH OF CO2 AND H2S

#32
20220161224
2022-05-26

Acid gas absorbent in biogas and biogas purification system using the same

#33
20220143548
2022-05-12

Diamine solvent system for COcapture

#34
20220089437
2022-03-24

Process for producing pure hydrogen with low steam export

#35
20220051756
2022-02-17

MODELLING OF OPERATING AND/OR DIMENSIONING PARAMETERS OF A GAS TREATMENT PLANT

#36
20210402368
2021-12-30

Hydrogen sulfide adsorbent in biogas and biogas purification system using the same

#37
20210362090
2021-11-25

Process and system for capture of carbon dioxide

#38
20210339223
2021-11-04

COMPOSITE HYDROGELS FOR ADSORPTION OF ORGANIC ACID ANIONS & METAL IONS FROM LEAN MDEA

#39
20210253499
2021-08-19

PROCESS AND SYSTEM TO PURIFY GAS

#40
20210106944
2021-04-15

ABSORBENT COMPOSITIONS INCLUDING AMINO-SILOXANES

#41
20210095381
2021-04-01

CARBON DIOXIDE REDUCTION SYSTEM AND CARBON DIOXIDE REDUCTION METHOD

#42
20210069638
2021-03-11

Gas purification using a co-axial co-current contactor

#43
20210031138
2021-02-04

Absorbent liquid for CO2 and/or H2S, and apparatus and method using same

#44
20200376428
2020-12-03

Acid gas absorbent, acid gas removal method, and acid gas removal device

#45
20200306688
2020-10-01

Diamine solvent system for COcapture

#46
20200277186
2020-09-03

Thermal stage and reduction absorption sulfur recovery process

#47
20200269187
2020-08-27

Absorbent and process for selectively removing hydrogen sulfide

#48
20200207703
2020-07-02

Hydrogen sulfide scavengers

#49
20200197864
2020-06-25

Method for Scavenging Airborne Formaldehyde

#50
20200164303
2020-05-28

Absorbent and process for selectively removing hydrogen sulfide

#51
20200108343
2020-04-09

Absorbent compositions including amino-siloxanes

#52
20200047110
2020-02-13

Acidic gas absorbent, acidic gas removal method and acidic gas removal apparatus

#53
20190388829
2019-12-26

Absorbent for selective removal of hydrogen sulfide from a fluid stream

#54
20190381448
2019-12-19

Process for removal of acid gases from a fluid stream

#55
20190374905
2019-12-12

CAPTURE AND RELEASE OF ACID GASSES USING TUNABLE ORGANIC SOLVENTS WITH AMINOPYRIDINE

#56
20190374904
2019-12-12

Capture and release of acid gasses using tunable organic solvents with aminopyridine

#57
20190374903
2019-12-12

Capture and release of acid gasses using tunable organic solvents with aminopyridine

#58
20190329176
2019-10-31

Compositions and methods for carbon dioxide capture

#59
20190291044
2019-09-26

Process and system for capture of carbon dioxide

#60
20190160422
2019-05-30

Acid gas absorbent, acid gas removal method, and acid gas removal device

#61
20190151794
2019-05-23

Composite amine absorbing solution, and device and method for removing CO2 or H2S or both

#62
20190134557
2019-05-09

Removal of hydrogen sulphide and carbon dioxide from a stream of fluid

#63
20190126193
2019-05-02

Premix for producing an absorption agent for removing acid gases from a fluid flow

#64
20190119197
2019-04-25

Hydrogen sulfide scavengers

#65
20190060779
2019-02-28

Systems and methods for enhancing amine agent recovery with a reclaimer

#66
20190039014
2019-02-07

Capture and release of acid gasses using tunable organic solvents with aminopyridine

#67
20190039013
2019-02-07

Method for separating C5-C8 hydrocarbons and acid gases from a fluid stream

#68
20190027771
2019-01-24

ACID GAS REGENERABLE BATTERY

#69
20190010118
2019-01-10

Guanidine compounds for removal of oxyanions from aqueous solutions and for carbon dioxide capture

#70
20190001259
2019-01-03

Absorption agent, method of manufacturing same, and method for separation and recovery of acidic compound

#71
20180369743
2018-12-27

Polyamines, synthesis process thereof and use of same for the selective elimination of HS from a gaseous effluent comprising CO

#72
20180339265
2018-11-29

SYSTEM FOR TIME-SHIFTING POST-COMBUSTION CO2 CAPTURE

#73
20180318755
2018-11-08

Separation of a target substance from a fluid or mixture using encapsulated sorbents

#74
20180311611
2018-11-01

Absorbent for the selective removal of hydrogen sulfide

#75
20180311610
2018-11-01

Gas treatment method and gas treatment device

#76
20180280871
2018-10-04

Intensification of biocatalytic gas absorption

#77
20180280867
2018-10-04

Absorbent liquid for COand/or HS, and apparatus and method using same

#78
20180272270
2018-09-27

AMINE COMPOUNDS FOR SELECTIVELY REMOVING HYDROGEN SULPHIDE

#79
20180257022
2018-09-13

ABSORPTION AGENT AND A METHOD FOR SELECTIVELY REMOVING HYDROGEN SULPHIDE

#80
20180223204
2018-08-09

Gas separation by vaporized compound

#81
20180222847
2018-08-09

Diamine having tert-alkylamino group and primary amino group for use in gas scrubbing

#82
20180221818
2018-08-09

COcapture methods using carbonic anhydrase

#83
20180154307
2018-06-07

Method of capturing carbon dioxide

#84
20180001255
2018-01-04

Solvent and method for removing acid gases from a gaseous mixture

#85
20170312681
2017-11-02

PROCESS AND APPARATUS FOR SEPARATING ENTRAINED AMINES FROM A GAS STREAM

#86
20170312680
2017-11-02

Systems and methods for COremoval from flue gas by temperature swing absorption

#87
20170305817
2017-10-26

Separations with ionic liquid solvents

#88
20170282116
2017-10-05

Removal of carbon dioxide from a fluid flow

#89
20170282115
2017-10-05

Removal of hydrogen sulphide and carbon dioxide from a stream of fluid

#90
20170266607
2017-09-21

CARBONIC ACID GAS ABSORBING MATERIAL, CARBONIC ACID GAS RECOVERY SYSTEM, AND CARBONIC ACID GAS RECOVERY METHOD

#91
20170252695
2017-09-07

Regenerable solvent mixtures for acid-gas separation

#92
20170246586
2017-08-31

PROCESS AND APPARATUS FOR SEPARATING ENTRAINED AMINES FROM A GAS STREAM

#93
20170239612
2017-08-24

Cold Solvent Gas Treating System

#94
20170203250
2017-07-20

Capture and release of acid gasses using tunable organic solvents with aminopyridine

#95
20170173527
2017-06-22

THERMAL STAGE AND REDUCTION ABSORPTION SULFUR RECOVERY PROCESS

#96
20170173522
2017-06-22

Carbon dioxide separation and capture apparatus and method of controlling operation of carbon dioxide separation and capture apparatus

#97
20170173518
2017-06-22

Composite method of trapping carbon dioxide in gas mixture

#98
20170106331
2017-04-20

Absorbent system and method for capturing CO from a gas stream

#99
20170088505
2017-03-30

Hydrogen sulfide scavengers

#100
20170081603
2017-03-23

Gas separation by vaporized compound

#101
20170080378
2017-03-23

THERMALLY STABLE AMINES FOR CO2 CAPTURE

#102
20170050140
2017-02-23

Water control in non-aqueous acid gas recovery systems

#103
20170036192
2017-02-09

Method for regenerating a used sorbent having a gas adsorbate adsorbed thereto

#104
20170021305
2017-01-26

Aqueous absorbent composition for enhanced removal of hydrogen sulfide from gaseous mixtures and method for using the same

#105
20160296882
2016-10-13

Acidic gas absorbing agent, method for removing acidic gas and apparatus for removing acidic gas

#106
20160288046
2016-10-06

Hybrid solvent formulations for total organic sulfur removal and total acidic gas removal

#107
20160271558
2016-09-22

Hybrid solvent formulations for selective HS removal

#108
20160263519
2016-09-15

Process for capturing sulfur dioxide from a gas stream

#109
20160244467
2016-08-25

Amino-siloxane composition and methods of using the same

#110
20160220947
2016-08-04

COMPOSITE AMINE ABSORBENT, AND APPARATUS AND METHOD FOR REMOVING CO2 AND/OR H2S

#111
20160207854
2016-07-21

Use of diethylenetriamine as a CS2 scavenger in isoprene production

#112
20160193568
2016-07-07

CARBON DIOXIDE ABSORBER AND CARBON DIOXIDE SEPARATION/RECOVERY METHOD USING THE ABSORBER

#113
20160193563
2016-07-07

Carbon capture solvents and methods for using such solvents

#114
20160193562
2016-07-07

Sterically hindered amines and associated methods

#115
20160193560
2016-07-07

Optimization of stripper feed configuration for rich/lean solvent regeneration

#116
20160158690
2016-06-09

Reversible light driven gas absorbent solution and process

#117
20160136568
2016-05-19

Acidic gas absorbing agent, method for removing acidic gas and apparatus for removing acidic gas

#118
20160101385
2016-04-14

Carbon dioxide absorbent and method for absorbing and desorbing carbon dioxide

#119
20160096784
2016-04-07

Separations with ionic liquid solvents

#120
20160059178
2016-03-03

System and method for desorption of acid gas from an absorption liquid

#121
20160045857
2016-02-18

Method and Device for Separating Acid Gases from a Gas Mixture

#122
20160038872
2016-02-11

Non-aqueous amine scrubbing for removal of carbon dioxide

#123
20160016111
2016-01-21

Systems and methods for COremoval from flue gas by temperature swing absorption

#124
20160008755
2016-01-14

Method and device for the treatment of a gas stream, in particular for the treatment of a natural gas stream

#125
20160001220
2016-01-07

LIQUID FOR ABSORBING AND COLLECTING CARBON DIOXIDE IN GAS, AND METHOD FOR COLLECTING CARBON DIOXIDE WITH USE OF SAME

#126
20150336045
2015-11-26

Carbon dioxide absorbent based on amine having nitrile functional group, and carbon dioxide absorption method and separation method using same

#127
20150196875
2015-07-16

Method of increasing mass transfer rate of acid gas scrubbing solvents

#128
20150157975
2015-06-11

Absorbent composition for the selective absorption of hydrogen sulfide

#129
20150151246
2015-06-04

Acid gas absorbent, acid gas removal device, and acid gas removal method

#130
20150132207
2015-05-14

Complex amine absorbent, and device and method for removing one or both of COand HS

#131
20150104366
2015-04-16

Amino-siloxane composition and methods of using the same

#132
20150083425
2015-03-26

Inline non-targeted component removal

#133
20150073150
2015-03-12

Blends of amines with piperazine for COcapture

#134
20150027055
2015-01-29

SEPARATION OF HYDROGEN SULFIDE FROM NATURAL GAS

#135
20150007728
2015-01-08

Aqueous solution which efficiently absorbs and recovers carbon dioxide in exhaust gas, and method for recovering carbon dioxide using same

#136
20140367612
2014-12-18

Organic amine decarbonization solutions

#137
20140360369
2014-12-11

PROCESS FOR THE ASBORPTION OF CO2 FROM A GAS MIXTURE WITH AN ABSORPTION MEDIUM COMPRISING AMINES

#138
20140352532
2014-12-04

Continuously stirred tank reactor absorber and flash tank stripper system

#139
20140335589
2014-11-13

Separation of a target substance from a fluid or mixture using encapsulated sorbents

#140
20140294704
2014-10-02

Solvent and method for removal of an acid gas from a fluid stream

#141
20140290483
2014-10-02

Process for removing acidic compounds from a gaseous effluent with an absorbent solution based on dihydroxyalkylamines bearing severe steric hindrance of the nitrogen atom

#142
20140234191
2014-08-21

Aminopyridine derivatives for removal of hydrogen sulfide from a gas mixture

#143
20140093440
2014-04-03

Corrosion control in acid gas removal equipment by the situ generation of polysulfide ions

#144
20140042362
2014-02-13

In situ generation of polysulfide ions using elemental sulfur for improved corrosion control, cyanide management, mercury management, arsine management and performance and reliability of acid gas removal equipment

#145
20140030177
2014-01-30

High cyclic capacity amines for high efficiency COscrubbing processes

#146
20130327983
2013-12-12

Acid gas scrubbing composition

#147
20130320258
2013-12-05

Synergistic H S scavengers

#148
20130280155
2013-10-24

Sterically hindered amines and associated methods

#149
20130164200
2013-06-27

Regenerable solvent mixtures for acid-gas separation

#150
20130164199
2013-06-27

Regenerable solvent mixtures for acid-gas separation

#151
20130126429
2013-05-23

AMINE SULFIDE SCAVENGERS, METHODS OF USING, AND METHODS OF MAKING

#152
20130071307
2013-03-21

Method and device for the absorptive removal of carbon dioxide from biogas

#153
20130053614
2013-02-28

SOLVENT TREATMENT PROCESS

#154
20130052109
2013-02-28

COMPOSITIONS FOR ABSORBING CARBON DIOXIDE, AND RELATED PROCESSES AND SYSTEMS

#155
20130023712
2013-01-24

METHOD OF REMOVING ACID COMPOUNDS FROM A GASEOUS EFFLUENT WITH AN ABSORBENT SOLUTION BASED ON I/II/III TRIAMINES

#156
20130019530
2013-01-24

Method and an apparatus for sweetening and dehydrating a hydrocarbon gas, in particular a natural gas

#157
20130011314
2013-01-10

METHOD OF REMOVING ACID COMPOUNDS FROM A GASEOUS EFFLUENT WITH AN ABSORBENT SOLUTION BASED ON I, II/III DIAMINES

#158
20130000301
2013-01-03

Low pressure steam pre-heaters for gas purification systems and processes of use

#159
20120321538
2012-12-20

Gas separation by vaporized compound

#160
20120308469
2012-12-06

Carbon dioxide-absorbing solution and method of recovering carbon dioxide

#161
20120308458
2012-12-06

COabsorption from gas mixtures using an aqueous solution of 4-amino-2,2,6,6-tetramethylpiperidine

#162
20120308457
2012-12-06

Alkali-carbonate-based carbon dioxide absorbent containing added sterically hindered cyclic amines, and method for removing carbon dioxide removing using same

#163
20120294785
2012-11-22

Acidic gas absorbent, acidic gas removal device, and acidic gas removal method

#164
20120288429
2012-11-15

Bi-directional reactor and supported monoethenalamine for COseparation

#165
20120282160
2012-11-08

CARBON DIOXIDE AND HYDROGEN SULFIDE ABSORBENTS AND PROCESS FOR THEIR USE

#166
20120251421
2012-10-04

PROCESSES FOR REDUCING NITROSAMINE FORMATION DURING GAS PURIFICATION IN AMINE BASED LIQUID ABSORPTION SYSTEMS

#167
20120238006
2012-09-20

Process for removal of carbon dioxide from a gas stream

#168
20120214219
2012-08-23

Separation of a target substance from a fluid or mixture using encapsulated sorbents

#169
20120174783
2012-07-12

Method and system for removal of gaseous contaminants

#170
20120171105
2012-07-05

Method for improving total energy demand in a post-combustion carbon capture process with ionic absorbent

#171
20120171095
2012-07-05

Liquid carbon dioxide absorbents, methods of using the same, and related systems

#172
20120161071
2012-06-28

Acid gas absorbent, acid gas removal method, and acid gas removal device

#173
20120145001
2012-06-14

Process for reducing contaminants in an industrial fluid stream

#174
20120070353
2012-03-22

Process For Separating Off Acidic Gases By Means Of Metal-Organic Frameworks Impregnated With Amines

#175
20120063980
2012-03-15

Alkanolamine COscrubbing process

#176
20120063979
2012-03-15

High COto amine adsorption capacity COscrubbing processes

#177
20120063978
2012-03-15

Ionic liquids as amine promoter solvents for removal of carbon dioxide

#178
20120063977
2012-03-15

Ionic liquids for removal of carbon dioxide

#179
20120061614
2012-03-15

Non-aqueous amine scrubbing for removal of carbon dioxide

#180
20120060686
2012-03-15

Mixed amine and non-nucleophilic base CO2 scrubbing process for improved adsorption at increased temperatures

#181
20120017762
2012-01-26

COabsorption from gas mixtures using an aqueous solution of 4-amino-2,2,6,6-tetramethylpiperidine

#182
20110256043
2011-10-20

Composition for treating acid gas

#183
20110232490
2011-09-29

Chemical compounds for the removal of carbon dioxide from gases

#184
20110217218
2011-09-08

Systems and Methods for Acid Gas Removal

#185
20110192215
2011-08-11

Analytical System for In-Line Analysis of Post-Combustion Capture Solvents

#186
20110150730
2011-06-23

Carbon dioxide sorbents

#187
20110127218
2011-06-02

Regenerator Configurations and Methods with Reduced Steam Demand

#188
20110008229
2011-01-13

Sulfur recovery plant tail gas treatment process

#189
20100329953
2010-12-30

Acid gas scrubbing composition

#190
20100326276
2010-12-30

Acid gas scrubbing composition

#191
20100105551
2010-04-29

Absorbents for separating acidic gases

#192
20080078292
2008-04-03

Absorbing solution, method and device for absorbing COor HS or both

#193
20070264180
2007-11-15

Method of deacidizing a gas by partly neutralized multiamines

#194
18954659
2025-11-25

Systems for removing carbon dioxide from a carbon dioxide containing gas, and related methods

#195
16135494
2020-02-18

Method of Determination of Operating and/or Dimensioning Parameters of A Gas Treatment Plant