ClassID:

160527

F25J2270/42 - CPC Classification

Classification description:

Refrigeration techniques used Quasi-closed internal or closed external nitrogen refrigeration cycle

Recent Application in this class:
#1
20260092734
2026-04-02

Method of Hydrogen Liquefaction Using Optimized Claude Refrigeration Cycles

#2
20260063360
2026-03-05

HIGH-PURITY OXYGEN PRODUCTION APPARATUS

#3
20250251189
2025-08-07

System and Method for Separating Nitrogen from Methane with Ultra-Low Greenhouse Gas Emissions

#4
20250223245
2025-07-10

PROCESS AND DEVICE FOR PRODUCING LIQUID METHANE

#5
20250003679
2025-01-02

AIR SEPARATION SYSTEM AND AIR SEPARATION METHOD

#6
20250003677
2025-01-02

Cryogenic Neon Purification System and Method

#7
20240401877
2024-12-05

Nitrogen Rejection Unit System and Method for Low Nitrogen Concentration Feeds

#8
20240393041
2024-11-28

INSTALLATION AND METHOD FOR THE LIQUEFACTION OF HYDROGEN

#9
20240384927
2024-11-21

SYSTEM AND METHOD FOR RELIQUEFACTION OF BOIL-OFF GAS OF SHIP AND SYSTEM AND METHOD FOR TREATING OFFGAS OF RELIQUEFACTION APPARATUS

#10
20240377130
2024-11-14

LIQUEFIED GAS SUPPLY SYSTEM AND AIR SEPARATION UNIT COMPRISING SAME

#11
20240353174
2024-10-24

DUAL TEMPERATURE LIQUID OXYGEN SUBCOOLING IN AN AIR SEPARATION UNIT

#12
20240343578
2024-10-17

HELIUM SEPARATION AND RECOVERY PROCESS

#13
20240295359
2024-09-05

Device and Method for Recovering Gas with Variable Low-Temperature

#14
20240125550
2024-04-18

Process and Apparatus for Improved Recovery of Argon

#15
20240053097
2024-02-15

AIR SEPARATION UNIT AND AIR SEPARATION METHOD

#16
20240035745
2024-02-01

System and method for cryogenic air separation using four distillation columns including an intermediate pressure column

#17
20240035743
2024-02-01

Process and apparatus for recovery of at least nitrogen and argon

#18
20240019206
2024-01-18

CRYOGENIC PROCESS FOR RECOVERING VALUABLE COMPONENTS FROM A HYDROGEN-RICH FEED GAS

#19
20230304731
2023-09-28

FACILITY AND METHOD FOR REFRIGERATING A FLUID

#20
20230055205
2023-02-23

NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT WITH EXCESS AIR CIRCUIT

#21
20230003443
2023-01-05

Arctic cascade method for natural gas liquefaction in a high-pressure cycle with pre-cooling by ethane and sub-cooling by nitrogen, and a plant for its implementation

#22
20220307731
2022-09-29

SYSTEM, METHOD AND APPARATUS FOR THE REGENERATION OF NITROGEN ENERGY WITHIN A CLOSED LOOP CRYOGENIC SYSTEM

#23
20220034584
2022-02-03

LARGE LIQUID OXYGEN AND LIQUEFIED NATURAL GAS PRODUCTION PROCESS

#24
20210140707
2021-05-13

Arctic cascade method for natural gas liquefaction in a high-pressure cycle with pre-cooling by ethane and sub-cooling by nitrogen, and a plant for its implementation

#25
20190170436
2019-06-06

Highly cost effective technology for capture of industrial emissions without reagent for clean energy and clean environment applications

#26
20190151789
2019-05-23

Carbon dioxide capturing apparatus using cold heat of liquefied natural gas and power generation system using same

#27
20190072326
2019-03-07

System and method for recovery of non-condensable gases such as neon, helium, xenon, and krypton from an air separation unit

#28
20190056176
2019-02-21

Process and device for the cryogenic separation of synthesis gas

#29
20190003766
2019-01-03

System and method for rare gas recovery

#30
20180372404
2018-12-27

Method for liquefying natural gas and nitrogen

#31
20180356152
2018-12-13

System and method for enhanced argon recovery from a feed stream comprising hydrogen, methane, nitrogen and argon

#32
20180298292
2018-10-18

CYROGENIC SEPARATION OF LIGHT OLEFINS AND METHANE FROM SYNGAS

#33
20180283775
2018-10-04

CYROGENIC SEPARATION OF LIGHT OLEFINS AND METHANE FROM SYNGAS

#34
20180080710
2018-03-22

System and method for cryogenic purification of a feed stream comprising hydrogen, methane, nitrogen and argon

#35
20180080709
2018-03-22

System and method for cryogenic purification of a feed stream comprising hydrogen, methane, nitrogen and argon

#36
20180080708
2018-03-22

System and method for cryogenic purification of a feed stream comprising hydrogen, methane, nitrogen and argon

#37
20180058757
2018-03-01

Process and apparatus for producing carbon monoxide

#38
20170356677
2017-12-14

System, method and apparatus for the regeneration of nitrogen energy within a closed loop cryogenic system

#39
20170343280
2017-11-30

Refrigerant vent rectifier and efficiency booster

#40
20170336138
2017-11-23

INTEGRATED PROCESS FOR NGL (NATURAL GAS LIQUIDS RECOVERY) AND LNG (LIQUEFACTION OF NATURAL GAS)

#41
20170268821
2017-09-21

System and method for enhanced argon recovery from a feed stream comprising hydrogen, methane, nitrogen and argon

#42
20170268820
2017-09-21

System and method for argon recovery from a feed stream comprising hydrogen, methane, nitrogen and argon

#43
20170122661
2017-05-04

System and method for argon recovery from the tail gas of an ammonia production plant

#44
20170038139
2017-02-09

METHOD FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS

#45
20170038138
2017-02-09

APPARATUS FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS

#46
20170038137
2017-02-09

METHOD FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS AND NITROGEN

#47
20170038136
2017-02-09

METHOD FOR THE INTEGRATION OF A NITROGEN LIQUEFIER AND LIQUEFACTION OF NATURAL GAS FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS AND LIQUID NITROGEN

#48
20170038135
2017-02-09

METHOD FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS AND LIQUID NITROGEN

#49
20170038134
2017-02-09

METHOD FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS

#50
20170038133
2017-02-09

METHOD FOR THE INTEGRATION OF A NITROGEN LIQUEFIER AND LETDOWN OF NATURAL GAS FOR THE PRODUCTION OF LIQUID NITROGEN AND LOWER PRESSURE NATURAL GAS

#51
20170038132
2017-02-09

Methods and systems for integration of industrial site efficiency losses to produce LNG and/or LIN

#52
20160268874
2016-09-15

Liquefaction system and power generation system

#53
20140245780
2014-09-04

Multi nitrogen expansion process for LNG production

#54
20140238076
2014-08-28

Nitrogen rejection unit

#55
20140182331
2014-07-03

Integrated process for NGL (natural gas liquids recovery) and LNG (liquefaction of natural gas)

#56
20130139543
2013-06-06

Systems and methods for integrated energy storage and cryogenic carbon capture

#57
20130111948
2013-05-09

Purification of Carbon Dioxide

#58
20130039835
2013-02-14

Hydrogen and Nitrogen Recovery from Ammonia Purge Gas

#59
20120297821
2012-11-29

Systems and methods for separating condensable vapors from light gases or liquids by recuperative cryogenic processes

#60
20120180657
2012-07-19

METHOD FOR PRODUCING AT LEAST ONE GAS HAVING A LOW CO2 CONTENT AND AT LEAST ONE FLUID HAVING A HIGH CO2 CONTENT

#61
20120067081
2012-03-22

Process And Plant For Recovering Argon In A Separation Unit For A Purge Gas Used In The Synthesis Of Ammonia

#62
20110239701
2011-10-06

METHOD OF REJECTING NITROGEN FROM A HYDROCARBON STREAM TO PROVIDE A FUEL GAS STREAM AND AN APPARATUS THEREFOR

#63
20110226009
2011-09-22

Process for producing liquid and gaseous nitrogen streams, a gaseous stream which is rich in helium and a denitrided stream of hydrocarbons and associated installation

#64
20110209499
2011-09-01

METHOD FOR REMOVING NITROGEN

#65
20110209498
2011-09-01

PROCESS FOR SEPARATING OFF NITROGEN

#66
20110126585
2011-06-02

Krypton xenon recovery from pipeline oxygen

#67
20100192627
2010-08-05

Method and device for the cryogenic separation of a methane-rich flow

#68
20100162754
2010-07-01

Method And Device For Separating A Mixture Of Hydrogen, Methane And Carbon Monoxide By Cryogenic Distillation

#69
20100037655
2010-02-18

Hydrogen Recovery From A Mixture Of Hydrogen and Hydrocarbons At Low Pressure And Of Low Hydrogen Content

#70
20090257937
2009-10-15

Method and apparatus for purifying and separating a heavy component concentrate along with obtaining light gas isotopes

#71
20090205367
2009-08-20

Combined synthesis gas separation and LNG production method and system

#72
20090188278
2009-07-30

Method for purifying and separating a krypton-xenon mixture by rectification and a device for carrying out said method

#73
20080066493
2008-03-20

Treating Liquefied Natural Gas

#74
20080066492
2008-03-20

Treating Liquefied Natural Gas

#75
20060248921
2006-11-09

Landfill gas purification and liquefaction process