ClassID:

30320

B01D2252/20447 - CPC Classification

Classification description:

Absorbents, i.e. solvents and liquid materials for gas absorption; Organic absorbents; Amines; Cyclic amines containing a piperazine-ring

Recent Application in this class:
#1
20260115647
2026-04-30

CARBON FOOTPRINT REDUCTION FOR IMPURITIES REMOVAL FROM A PRODUCED GAS

#2
20260103448
2026-04-16

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

#3
20260001056
2026-01-01

CARBON DIOXIDE ABSORBENT CONTAINING IONIC MATERIAL CONTAINING SPIRO AMMONIUM CATION AND HYDROXIDE ANION, AND CARBON DIOXIDE SEPARATION METHOD USING THE SAME

#4
20250262589
2025-08-21

AMINE COMPOSITION FOR CARBON DIOXIDE SEPARATION USE

#5
20250229219
2025-07-17

CARBON DIOXIDE CAPTURE AGENT CONTAINING TWO TYPES OF AMINE COMPOUNDS AND CARBON DIOXIDE CAPTURE METHOD USING THE SAME

#6
20250161867
2025-05-22

SOLVENT SYSTEMS FOR CARBON DIOXIDE CAPTURE AND METHODS OF MAKING AND USING SAID SYSTEMS

#7
20250025831
2025-01-23

SYSTEM AND PROCESS OF CAPTURING CARBON DIOXIDE FROM FLUE GASES

#8
20240343578
2024-10-17

HELIUM SEPARATION AND RECOVERY PROCESS

#9
20240307817
2024-09-19

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

#10
20240050890
2024-02-15

METHOD FOR CAPTURING A MOLECULE OF INTEREST AND ASSOCIATED CAPTURE SYSTEM

#11
20240042377
2024-02-08

Composite amine absorbent, removal unit, and removal method

#12
20240042376
2024-02-08

Water-lean carbon dioxide absorbent and method for capturing carbon dioxide by using same

#13
20230357658
2023-11-09

Method for removing acid compounds from a gaseous effluent using a tertiary amine-based absorbent solution

#14
20230356182
2023-11-09

COMPOSITION FOR CARBON DIOXIDE SEPARATION AND METHOD FOR SEPARATING CARBON DIOXIDE

#15
20230330596
2023-10-19

System and process of capturing carbon dioxide from flue gases

#16
20230321590
2023-10-12

AQUEOUS LIQUID SORBENT

#17
20230158445
2023-05-25

Process for Conversion of Bis(hydroxyethylethoxy)-urea to DGA

#18
20230145006
2023-05-11

System for Offshore Carbon Dioxide Capture

#19
20230020748
2023-01-19

METHOD FOR UPGRADING BIO-BASED MATERIAL AND UPGRADED MATERIAL

#20
20230001348
2023-01-05

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

#21
20220387926
2022-12-08

COMPOSITIONS AND METHODS FOR CARBON DIOXIDE CAPTURE

#22
20220331740
2022-10-20

Electrochemically enhanced process for next generation carbon dioxide capture

#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
20220152551
2022-05-19

Process for removal of acid gases from a fluid stream with a liquid absorbent comprising a piperazine ring

#25
20210322923
2021-10-21

System and process of capturing carbon dioxide from flue gases

#26
20210308619
2021-10-07

Solvent and process for removing carbon dioxide from a gaseous mixture having high carbon dioxide partial pressures

#27
20210291108
2021-09-23

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

#28
20210245092
2021-08-12

Hybrid post-combustion COcapture system and method

#29
20210236984
2021-08-05

CARBON CAPTURE SOLVENTS HAVING ALCOHOLS AND AMINES AND METHODS FOR USING SUCH SOLVENTS

#30
20210220769
2021-07-22

Two-stage method for removing COfrom synthesis gas

#31
20210213383
2021-07-15

Apparatus and process for producing a deacidified fluid stream

#32
20210147757
2021-05-20

Process for producing a deacidified fluid stream

#33
20210138391
2021-05-13

Method and a system for the removal of carbon dioxide from solvents

#34
20210138390
2021-05-13

Combined acid gas removal and water filtration system

#35
20210031138
2021-02-04

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

#36
20200376428
2020-12-03

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

#37
20200330920
2020-10-22

Method for regenerating an amine-based, acid gas absorbent using a catalyst mixture containing silver oxide and silver carbonbate

#38
20200171423
2020-06-04

Acid gas removal system for removing acidic gases from gaseous hydrocarbons

#39
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

#40
20200086265
2020-03-19

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

#41
20200047117
2020-02-13

Process for producing a purified gas stream

#42
20200038803
2020-02-06

Regeneration system for carbon-rich amine solutions and method for using the same

#43
20190381448
2019-12-19

Process for removal of acid gases from a fluid stream

#44
20190358579
2019-11-28

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

#45
20190329176
2019-10-31

Compositions and methods for carbon dioxide capture

#46
20190262768
2019-08-29

Two-stage method for removing COfrom synthesis gas

#47
20190160422
2019-05-30

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

#48
20190151794
2019-05-23

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

#49
20190112538
2019-04-18

COMPOSITION AND USE THEREOF FOR THE REMOVAL OF ACID GASES FROM HYDROCARBON FLUID STREAMS

#50
20190083921
2019-03-21

Carbon dioxide absorbent and apparatus of separating and recovering carbon dioxide

#51
20190060779
2019-02-28

Systems and methods for enhancing amine agent recovery with a reclaimer

#52
20190027771
2019-01-24

ACID GAS REGENERABLE BATTERY

#53
20190009268
2019-01-10

Process for stripping carbamate from ion exchange resin

#54
20180326353
2018-11-15

Emissions reduction for CO2 capture

#55
20180326352
2018-11-15

Method and system for reducing CO2 emissions from industrial processes

#56
20180280867
2018-10-04

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

#57
20180272269
2018-09-27

ACID GAS REMOVAL WITH AN ABSORPTION LIQUID THAT SEPARATES IN TWO LIQUID PHASES

#58
20180264404
2018-09-20

Methods and systems for improving the energy efficiency of carbon dioxide capture

#59
20180223204
2018-08-09

Gas separation by vaporized compound

#60
20180222847
2018-08-09

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

#61
20180001255
2018-01-04

Solvent and method for removing acid gases from a gaseous mixture

#62
20170326495
2017-11-16

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

#63
20170282116
2017-10-05

Removal of carbon dioxide from a fluid flow

#64
20170274317
2017-09-28

Carbon capture solvents having alcohols and amines and methods for using such solvents

#65
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

#66
20170225118
2017-08-10

CARBON DIOXIDE ABSORBENT COMPRISING OXYGEN-CONTAINING DIAMINE

#67
20170216812
2017-08-03

Integrated process to recover high quality native COfrom a sour gas comprising HS and CO

#68
20170216763
2017-08-03

COmass transfer enhancement of aqueous amine solvents by particle additives

#69
20170081603
2017-03-23

Gas separation by vaporized compound

#70
20170080378
2017-03-23

THERMALLY STABLE AMINES FOR CO2 CAPTURE

#71
20170050141
2017-02-23

Apparatus for removing an acid gas from a gas stream

#72
20170021305
2017-01-26

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

#73
20170001142
2017-01-05

System for the capture and release of acid gases

#74
20160361683
2016-12-15

Method of increasing mass transfer rate of acid gas scrubbing solvents

#75
20160325225
2016-11-10

Methods and apparatuses for recovering CO

#76
20160296882
2016-10-13

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

#77
20160263519
2016-09-15

Process for capturing sulfur dioxide from a gas stream

#78
20160193563
2016-07-07

Carbon capture solvents and methods for using such solvents

#79
20160193560
2016-07-07

Optimization of stripper feed configuration for rich/lean solvent regeneration

#80
20160114286
2016-04-28

ABSORBENT FOR ACIDIC GAS SEPARATION AND METHOD FOR ACIDIC GAS SEPARATION

#81
20160114285
2016-04-28

Method for purifying gas using liquid marbles

#82
20160101385
2016-04-14

Carbon dioxide absorbent and method for absorbing and desorbing carbon dioxide

#83
20150367283
2015-12-24

Emissions reduction for COcapture

#84
20150352484
2015-12-10

Amine solvent blends

#85
20150307359
2015-10-29

Integrated process to recover high quality native COfrom a sour gas comprising HS and CO

#86
20150246298
2015-09-03

Apparatus for and method of removing acidic gas from a gaseous stream and regenerating an absorbent solution

#87
20150182907
2015-07-02

CARBON DIOXIDE ABSORBING AGENT, CARBON DIOXIDE CAPTURE SYSTEM AND METHOD OF SLOWING THE DEGRADATION OF THE CARBON DIOXIDE ABSORBING AGENT

#88
20150151240
2015-06-04

AQUEOUS ABSORBENT COMPOSITION FOR ENHANCED REMOVAL OF HYDROGEN SULFIDE FROM GASEOUS MIXTURES AND METHOD FOR USING THE SAME

#89
20150139877
2015-05-21

Process for purifying gaseous mixtures containing acidic gases

#90
20150132207
2015-05-14

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

#91
20150125373
2015-05-07

Method for absorbing COfrom a gas mixture

#92
20150118136
2015-04-30

Absorbent for desulfurization of combustion gas and method of treating combustion gas using the same

#93
20150073150
2015-03-12

Blends of amines with piperazine for COcapture

#94
20140335003
2014-11-13

Carbon dioxide recovery system and operating method thereof

#95
20140311342
2014-10-23

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

#96
20140294705
2014-10-02

Method of increasing mass transfer rate of acid gas scrubbing solvents

#97
20140234191
2014-08-21

Aminopyridine derivatives for removal of hydrogen sulfide from a gas mixture

#98
20140010753
2014-01-09

Hydrogen production with carbon capture

#99
20130327983
2013-12-12

Acid gas scrubbing composition

#100
20130298763
2013-11-14

Method for reducing regeneration energy

#101
20130251600
2013-09-26

Emissions reduction for COcapture

#102
20130160857
2013-06-27

Method and system for treating an effluent stream generated by a carbon capture system

#103
20130071307
2013-03-21

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

#104
20130053614
2013-02-28

SOLVENT TREATMENT PROCESS

#105
20130039829
2013-02-14

ACID GAS RECOVERY UTILIZING ORGANIC ACID SALTED DIAMINE

#106
20130032029
2013-02-07

Gas purification configurations and methods

#107
20130008310
2013-01-10

ALCOHOL-BASED GAS STRIPPING PROCESS

#108
20120321538
2012-12-20

Gas separation by vaporized compound

#109
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

#110
20120308451
2012-12-06

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

#111
20120305840
2012-12-06

CARBON DIOXIDE ABSORBING SOLUTION

#112
20120294785
2012-11-22

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

#113
20120288439
2012-11-15

Hydrogen production with carbon capture

#114
20120282160
2012-11-08

CARBON DIOXIDE AND HYDROGEN SULFIDE ABSORBENTS AND PROCESS FOR THEIR USE

#115
20120269707
2012-10-25

Use of 2-(3-aminopropoxy)ethan-1-ol as an absorbent to remove acidic gases

#116
20120251421
2012-10-04

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

#117
20120238006
2012-09-20

Process for removal of carbon dioxide from a gas stream

#118
20120161071
2012-06-28

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

#119
20120145001
2012-06-14

Process for reducing contaminants in an industrial fluid stream

#120
20120128561
2012-05-24

Acid gas absorbent composition

#121
20110290111
2011-12-01

Treatment of natural gas feeds

#122
20110283885
2011-11-24

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

#123
20110232490
2011-09-29

Chemical compounds for the removal of carbon dioxide from gases

#124
20110223087
2011-09-15

AMINO COMPOUNDS FOR CARBON DIOXIDE AND SULFUR DIOXIDE REMOVAL

#125
20110192215
2011-08-11

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

#126
20110182799
2011-07-28

SEQUESTRATION OF A GAS EMITTED BY AN INDUSTRIAL PLANT

#127
20110158873
2011-06-30

SEQUESTRATION OF A GAS EMITTED BY AN INDUSTRIAL PLANT

#128
20100329953
2010-12-30

Acid gas scrubbing composition

#129
20100326276
2010-12-30

Acid gas scrubbing composition

#130
20100320294
2010-12-23

Gas liquid contactor and effluent cleaning system and method

#131
20100319539
2010-12-23

Gas liquid contactor and effluent cleaning system and method

#132
20100105551
2010-04-29

Absorbents for separating acidic gases

#133
20100011956
2010-01-21

Gas liquid contactor and effluent cleaning system and method

#134
20080159937
2008-07-03

Process for the recovery of carbon dioxide from a gas stream

#135
20080078292
2008-04-03

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

#136
18883206
2025-06-10

Absorption medium and method for removing carbon dioxide from combustion exhaust gas

#137
18484497
2024-03-19

Carbon dioxide and nitrogen oxides removal system for point of use abatement

#138
18443242
2024-12-24

High performance COcapture solvent compositions, and COcapture systems and processes utilizing same