ClassID:

30313

B01D2252/2041 - CPC Classification

Classification description:

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

Recent Application in this class:
#1
20260091345
2026-04-02

Methods And Compositions for Carbon Capture

#2
20260008765
2026-01-08

METHOD FOR PREPARING AND SEPARATING ALKYLENE CARBONATE USING CARBON DIOXIDE IN AIR

#3
20250339809
2025-11-06

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

#4
20250170519
2025-05-29

METHOD AND APPARATUS FOR RECOVERING ABSORBING AGENTS IN ACID GAS TREATMENT

#5
20250026700
2025-01-23

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

#6
20240382898
2024-11-21

PROCESS AND SYSTEM FOR CAPTURE OF CARBON DIOXIDE

#7
20240375047
2024-11-14

METHODS AND COMPOSITIONS FOR CARBON CAPTURE

#8
20240327358
2024-10-03

Coupled urea melamine plant

#9
20240286074
2024-08-29

AMINE SOLVENT-BASED CARBON CAPTURE COMPOSITIONS

#10
20240198287
2024-06-20

CARBON DIOXIDE RECOVERING METHOD AND CARBON DIOXIDE RECOVERING DEVICE

#11
20240100473
2024-03-28

CARBON DIOXIDE ABSORBER

#12
20240042377
2024-02-08

Composite amine absorbent, removal unit, and removal method

#13
20230356145
2023-11-09

Diamine solvent system for COcapture

#14
20230256381
2023-08-17

Process and system for capture of carbon dioxide

#15
20230226483
2023-07-20

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

#16
20230211312
2023-07-06

REVAMPING OF AMMONIA-UREA PLANTS

#17
20230106908
2023-04-06

Method and apparatus for recovering absorbing agents in acid gas treatment

#18
20230078337
2023-03-16

Methods And Compositions for Carbon Capture

#19
20220387926
2022-12-08

COMPOSITIONS AND METHODS FOR CARBON DIOXIDE CAPTURE

#20
20220379258
2022-12-01

LOW ENERGY CONSUMPTION ANHYDROUS CO2 PHASE CHANGE ABSORPTION AGENT, AND REGENERATION METHOD AND APPLICATION THEREOF

#21
20220370952
2022-11-24

METHOD AND SYSTEM FOR FILTERING FORMALDEHYDE FROM INOOR AIR

#22
20220233997
2022-07-28

Highly efficient COabsorbent composition and method for preparing the same

#23
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

#24
20220143548
2022-05-12

Diamine solvent system for COcapture

#25
20220096996
2022-03-31

Composite amine absorbent, and device and method for removing CO2 or H2S, or both of CO2 and H2S

#26
20210362090
2021-11-25

Process and system for capture of carbon dioxide

#27
20210106944
2021-04-15

ABSORBENT COMPOSITIONS INCLUDING AMINO-SILOXANES

#28
20200376427
2020-12-03

Method and apparatus for recovering absorbing agents in acid gas treatment

#29
20200368675
2020-11-26

LOW ENERGY CONSUMPTION ANHYDROUS CO2 PHASE CHANGE ABSORPTION AGENT, AND REGENERATION METHOD AND APPLICATION THEREOF

#30
20200360855
2020-11-19

Process of improved sulfur capture from a syngas mixture

#31
20200306688
2020-10-01

Diamine solvent system for COcapture

#32
20200283357
2020-09-10

DEVICE FOR REMOVING SULFUR-CONTAINING COMPOUND AND METHOD FOR REMOVING SULFUR-CONTAINING COMPOUND

#33
20200254380
2020-08-13

Absorbent solution based on hydroxyl derivatives of 1,6-hexanediamine and method for eliminating acid compounds from a gaseous effluent

#34
20200197864
2020-06-25

Method for Scavenging Airborne Formaldehyde

#35
20200155997
2020-05-21

Sulfur dioxide absorbent is an ionic liquid including a salt of a diamine compound that is substituted with a hydroxyl group

#36
20200108343
2020-04-09

Absorbent compositions including amino-siloxanes

#37
20200086265
2020-03-19

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

#38
20190374905
2019-12-12

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

#39
20190374904
2019-12-12

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

#40
20190374903
2019-12-12

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

#41
20190367829
2019-12-05

Use of aminals to remove acid gases from fluid gas streams

#42
20190330541
2019-10-31

Composition for removal of sulfur-containing compound

#43
20190329176
2019-10-31

Compositions and methods for carbon dioxide capture

#44
20190314756
2019-10-17

METHOD AND SYSTEM FOR FILTERING FORMALDEHYDE FROM INOOR AIR

#45
20190291044
2019-09-26

Process and system for capture of carbon dioxide

#46
20190291043
2019-09-26

Systems and methods incorporating ionic liquids for electrochemically mediated capturing of Lewis acid gases

#47
20190151794
2019-05-23

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

#48
20190134557
2019-05-09

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

#49
20190126194
2019-05-02

CYCLOHEXANEDIAMINES FOR USE IN GAS SCRUBBING

#50
20190099711
2019-04-04

Methods and systems for removing COfrom a feed gas

#51
20190039014
2019-02-07

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

#52
20190027771
2019-01-24

ACID GAS REGENERABLE BATTERY

#53
20190001259
2019-01-03

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

#54
20180311611
2018-11-01

Absorbent for the selective removal of hydrogen sulfide

#55
20180304191
2018-10-25

METHOD FOR THE SELECTIVE REMOVAL OF HYDROGEN SULFIDE

#56
20180272270
2018-09-27

AMINE COMPOUNDS FOR SELECTIVELY REMOVING HYDROGEN SULPHIDE

#57
20180264399
2018-09-20

MEMBRANE CONTACTOR COMPRISING A COMPOSITE MEMBRANE OF A POROUS LAYER AND A NON-POROUS SELECTIVE POLYMER LAYER FOR CO2 SEPARATION FROM A MIXED GASEOUS FEED STREAM

#58
20180251421
2018-09-06

Beta-hydroxylated tertiary diamines, a process for their synthesis and their use for eliminating acid compounds a gaseous effluent

#59
20180185782
2018-07-05

Hydrogen sulfide scavenging additive compositions, and medium comprising the same

#60
20180154307
2018-06-07

Method of capturing carbon dioxide

#61
20180104643
2018-04-19

Composition and apparatus for purifying nitrogen-oxide-containing gases

#62
20180043308
2018-02-15

Power generation from low-temperature heat by hydro-osmotic processes

#63
20180028962
2018-02-01

Systems and methods incorporating ionic liquids for electrochemically mediated capturing of lewis acid gases

#64
20180015409
2018-01-18

Method and apparatus for recovering absorbing agents in acid gas treatment

#65
20180001259
2018-01-04

Method and system for treatment of a gas stream that contains carbon dioxide

#66
20170326495
2017-11-16

Absorbing liquid, method for preparing absorbing liquid, and device and method for removing CO2 or H2S or both

#67
20170282116
2017-10-05

Removal of carbon dioxide from a fluid flow

#68
20170282115
2017-10-05

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

#69
20170246587
2017-08-31

Carbon dioxide absorbent comprising triamine

#70
20170232380
2017-08-17

Method of development and use of catalyst-functionalized catalytic particles to increase the mass transfer rate of solvents used in acid gas cleanup

#71
20170225118
2017-08-10

CARBON DIOXIDE ABSORBENT COMPRISING OXYGEN-CONTAINING DIAMINE

#72
20170216763
2017-08-03

COmass transfer enhancement of aqueous amine solvents by particle additives

#73
20170203250
2017-07-20

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

#74
20170197176
2017-07-13

Absorbent solution containing a mixture of 1,2-bis-(2-dimethylaminoethoxy)-ethane and of 2-[2-(2-dimethylaminoethoxy)-ethoxy]-ethanol, and method of removing acid compounds from a gaseous effluent

#75
20170165608
2017-06-15

System and methods for COseparation

#76
20170144102
2017-05-25

Sterically hindered amines and associated methods

#77
20170100694
2017-04-13

Absorbent solution based on beta-hydroxylated tertiary diamines and method of removing acid compounds from a gaseous effluent

#78
20170081275
2017-03-23

NOVEL BETA-HYDROXYLATED TERTIARY DIAMINES, A PROCESS FOR THEIR SYNTHESIS AND THEIR USE FOR ELIMINATING ACID COMPOUNDS A GASEOUS EFFLUENT

#79
20170080378
2017-03-23

THERMALLY STABLE AMINES FOR CO2 CAPTURE

#80
20170021305
2017-01-26

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

#81
20170001142
2017-01-05

System for the capture and release of acid gases

#82
20160375400
2016-12-29

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

#83
20160375399
2016-12-29

CARBON DIOXIDE ABSORBENT AND METHOD FOR REGENERATING CARBON DIOXIDE ABSORBENT

#84
20160325225
2016-11-10

Methods and apparatuses for recovering CO

#85
20160317967
2016-11-03

Rotating packed bed unit

#86
20160263519
2016-09-15

Process for capturing sulfur dioxide from a gas stream

#87
20160244467
2016-08-25

Amino-siloxane composition and methods of using the same

#88
20160193563
2016-07-07

Carbon capture solvents and methods for using such solvents

#89
20160193562
2016-07-07

Sterically hindered amines and associated methods

#90
20160158690
2016-06-09

Reversible light driven gas absorbent solution and process

#91
20160101385
2016-04-14

Carbon dioxide absorbent and method for absorbing and desorbing carbon dioxide

#92
20160059178
2016-03-03

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

#93
20150321144
2015-11-12

Method for selective absorption of hydrogen sulfide from a gaseous effluent by a 1,2-bis(2-dimethylaminoethoxy)ethane-based absorbent solution comprising a viscosifying agent

#94
20150321139
2015-11-12

PROCESS FOR ABSORPTION OF CO2 FROM A GAS MIXTURE USING AN AQUEOUS SOLUTION OF A DIAMINE

#95
20150321138
2015-11-12

METHOD FOR REMOVING ACID COMPOUNDS FROM A GASEOUS EFFLUENT USING AN ABSORBENT SOLUTION BASED ON 1,2-BIS(2-DIMETHYLAMINOETHOXY)ETHANE AND AN ACTIVATOR

#96
20150132207
2015-05-14

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

#97
20150122125
2015-05-07

METHOD OF IMPROVING A PROCESS FOR THE SELECTIVE ABSORPTION OF HYDROGEN SULFIDE

#98
20150104366
2015-04-16

Amino-siloxane composition and methods of using the same

#99
20150073150
2015-03-12

Blends of amines with piperazine for COcapture

#100
20150007728
2015-01-08

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

#101
20150004082
2015-01-01

System and method for treatment of a medium

#102
20140367612
2014-12-18

Organic amine decarbonization solutions

#103
20140360369
2014-12-11

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

#104
20140311342
2014-10-23

Method for eliminating acid compounds from a gaseous effluent with an absorbent solution made from bis(amino-3-propyl)ethers

#105
20140099245
2014-04-10

Process and system employing phase-changing absorbents and magnetically responsive sorbent particles for on-board recovery of carbon dioxide from mobile sources

#106
20140096684
2014-04-10

Carbon dioxide separating and capturing apparatus

#107
20130280155
2013-10-24

Sterically hindered amines and associated methods

#108
20130071307
2013-03-21

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

#109
20130055895
2013-03-07

REMOVAL OF CO2 FROM GASES OF LOW CO2 PARTIAL PRESSURES BY MEANS OF 1,2 DIAMINOPROPANE

#110
20130045154
2013-02-21

PROCESS FOR CAPTURE OF CARBON DIOXIDE

#111
20130039829
2013-02-14

ACID GAS RECOVERY UTILIZING ORGANIC ACID SALTED DIAMINE

#112
20130011314
2013-01-10

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

#113
20120308458
2012-12-06

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

#114
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

#115
20120304538
2012-12-06

Configuration of contacting zones in vapor-liquid contacting apparatuses

#116
20120294785
2012-11-22

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

#117
20120282160
2012-11-08

CARBON DIOXIDE AND HYDROGEN SULFIDE ABSORBENTS AND PROCESS FOR THEIR USE

#118
20120251421
2012-10-04

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

#119
20120238006
2012-09-20

Process for removal of carbon dioxide from a gas stream

#120
20120171095
2012-07-05

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

#121
20120160099
2012-06-28

Carbon dioxide separation method and apparatus

#122
20120128561
2012-05-24

Acid gas absorbent composition

#123
20120070353
2012-03-22

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

#124
20120017762
2012-01-26

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

#125
20110305616
2011-12-15

Configuration of contacting zones in vapor liquid contacting apparatuses

#126
20110296992
2011-12-08

Sulfur compounds for carbon dioxide and sulfur dioxide removal

#127
20110283885
2011-11-24

Process for removing carbon dioxide (CO) from a cycle gas system

#128
20110232490
2011-09-29

Chemical compounds for the removal of carbon dioxide from gases

#129
20110229393
2011-09-22

Methods for deacidizing gaseous mixtures by phase enhanced absorption

#130
20110223087
2011-09-15

AMINO COMPOUNDS FOR CARBON DIOXIDE AND SULFUR DIOXIDE REMOVAL

#131
20110223086
2011-09-15

Aromatic amino compounds for carbon dioxide and sulfur dioxide removal

#132
20110192215
2011-08-11

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

#133
20110182799
2011-07-28

SEQUESTRATION OF A GAS EMITTED BY AN INDUSTRIAL PLANT

#134
20110179948
2011-07-28

Application of amine-tethered solid sorbents to CO2 fixation from air

#135
20110158873
2011-06-30

SEQUESTRATION OF A GAS EMITTED BY AN INDUSTRIAL PLANT

#136
20100229723
2010-09-16

Method and absorbent composition for recovering a gaseous component from a gas stream

#137
20100154639
2010-06-24

LIQUID CARBON DIOXIDE ABSORBENT AND METHODS OF USING THE SAME

#138
20100154431
2010-06-24

LIQUID CARBON DIOXIDE ABSORBENT AND METHODS OF USING THE SAME

#139
20100144908
2010-06-10

Process for the regeneration of an ion exchange resin using sulfurous acid

#140
20100108610
2010-05-06

Method for treating a diamine absorbent stream

#141
20100105551
2010-04-29

Absorbents for separating acidic gases

#142
20080159937
2008-07-03

Process for the recovery of carbon dioxide from a gas stream

#143
20080078292
2008-04-03

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

#144
20060251558
2006-11-09

COremoval from gas using ionic liquid absorbents

#145
18770527
2024-10-22

Modular membrane isolation carbon desorption device, carbon capture system, method and application

#146
15814114
2018-10-09

Ionic liquid-based hydrogen sulfide and mercaptan scavengers

#147
15271175
2017-10-10

Solvents and methods for gas separation from gas streams