ClassID:

160410

F25J2215/42 - CPC Classification

Classification description:

Processes characterised by the type or other details of the product stream Nitrogen or special cases, e.g. multiple or low purity N

Sub-classes:
Recent Application in this class:
#1
20260146790
2026-05-28

METHOD FOR INCREASING PRODUCTION FLEXIBILITY OF AN AIR SEPARATION UNIT

#2
20260035243
2026-02-05

SYSTEM AND METHOD FOR PRODUCTION OF ULTRA-HIGH PURITY OXYGEN

#3
20250334332
2025-10-30

LIQUID NITROGEN GENERATOR AND PROCESS

#4
20250314424
2025-10-09

Apparatus and Process for Improved Argon Recovery

#5
20250271208
2025-08-28

PROCESS AND PLANT FOR PROVIDING A NITROGEN PRODUCT, AN OXYGEN PRODUCT AND A HYDROGEN PRODUCT

#6
20250264274
2025-08-21

AIR SEPARATION UNIT

#7
20250251189
2025-08-07

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

#8
20250237431
2025-07-24

METHOD AND APPARATUS FOR COMPRESSING A GAS

#9
20250146746
2025-05-08

CRYOGENIC AIR RECTIFICATION SYSTEM, CONTROL UNIT, AIR SEPARATION UNIT AND METHOD OF CRYOGENICALLY SEPARATING AIR

#10
20250060158
2025-02-20

NITROGEN GENERATING DEVICE AND NITROGEN GENERATING METHOD

#11
20250019325
2025-01-16

SYSTEM AND PROCESS FOR RECOVERING METHANE AND CARBON DIOXIDE FROM BIOGAS AND REDUCING GREENHOUSE GAS EMISSIONS

#12
20240401877
2024-12-05

Nitrogen Rejection Unit System and Method for Low Nitrogen Concentration Feeds

#13
20240393043
2024-11-28

METHOD FOR THE LOW-TEMPERATURE SEPARATION OF AIR AND AIR SEPARATION PLANT

#14
20240377130
2024-11-14

LIQUEFIED GAS SUPPLY SYSTEM AND AIR SEPARATION UNIT COMPRISING SAME

#15
20240035744
2024-02-01

Air separation unit and method for production of nitrogen and argon using a distillation column system with an intermediate pressure kettle column

#16
20240035743
2024-02-01

Process and apparatus for recovery of at least nitrogen and argon

#17
20240019206
2024-01-18

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

#18
20230341181
2023-10-26

NITROGEN GENERATING DEVICE AND NITROGEN GENERATING METHOD

#19
20230280093
2023-09-07

AIR SEPARATION APPARATUS

#20
20230090158
2023-03-23

METHOD AND APPARATUS FOR CRYOGENIC AIR SEPARATION

#21
20230082208
2023-03-16

OXYGEN LIQUEFIER DESIGN PHASING

#22
20230055205
2023-02-23

NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT WITH EXCESS AIR CIRCUIT

#23
20230050296
2023-02-16

Cryogenic air separation unit with argon condenser vapor recycle

#24
20230034371
2023-02-02

Energy-efficient process for preparing nitrogen and oxygen for glass melting furnace

#25
20230003445
2023-01-05

FULL LIQUID-PRODUCT AIR SEPARATION EQUIPMENT AND PROCESS THEREFOR

#26
20220325952
2022-10-13

METHOD AND APPARATUS FOR PRODUCING PRODUCT NITROGEN GAS AND PRODUCT ARGON

#27
20220316811
2022-10-06

Method for operating a heat exchanger, arrangement with a heat exchanger, and system with a corresponding arrangement

#28
20220252344
2022-08-11

Air separation device and air separation method

#29
20220128301
2022-04-28

METHOD AND APPARATUS FOR PRODUCING HIGH-PRESSURE NITROGEN

#30
20220127211
2022-04-28

System and process for recovering methane and carbon dioxide from biogas and reducing greenhouse gas emissions

#31
20220090855
2022-03-24

Method and apparatus for producing high-purity nitrogen and low-purity oxygen

#32
20210364232
2021-11-25

PROCESS FOR SUPPLYING OXYGEN AND/OR NITROGEN AND ALSO ARGON TO A GEOGRAPHIC ZONE

#33
20210364229
2021-11-25

Systems and Methods of Removing Contaminants in a Liquid Nitrogen Stream Used to Liquefy Natural Gas

#34
20210356205
2021-11-18

ENHANCEMENTS TO A MODERATE PRESSURE NITROGEN AND ARGON PRODUCING CRYOGENIC AIR SEPARATION UNIT

#35
20210278132
2021-09-09

Air separation device

#36
20210270524
2021-09-02

Systems and related methods for separating nitrogen from a natural gas stream containing less than 25% nitrogen

#37
20210221755
2021-07-22

System and process for recovering methane and carbon dioxide from biogas and reducing greenhouse gas emissions

#38
20210180863
2021-06-17

System and method for separating methane and nitrogen with reduced horsepower demands

#39
20210094894
2021-04-01

System and process for recovering methane and carbon dioxide from biogas and reducing greenhouse gas emissions

#40
20200271381
2020-08-27

PROCESS FOR UTILIZING OF MULTI STAGE COMPRESSORS INTERCOOLERS BLOWDOWN AS A COOLANT FOR PROCESS AIR

#41
20200149807
2020-05-14

System and method for enhanced recovery of argon and oxygen from a nitrogen producing cryogenic air separation unit

#42
20200132368
2020-04-30

Apparatus for the distillation of air by cryogenic distillation

#43
20200080773
2020-03-12

CRYOGENIC AIR SEPARATION UNIT WITH FLEXIBLE LIQUID PRODUCT MAKE

#44
20190331419
2019-10-31

System and method for enhanced recovery of argon and oxygen from a nitrogen producing cryogenic air separation unit

#45
20190331418
2019-10-31

System and method for high recovery of nitrogen and argon from a moderate pressure cryogenic air separation unit

#46
20190331417
2019-10-31

System and method for enhanced recovery of argon and oxygen from a nitrogen producing cryogenic air separation unit

#47
20190293347
2019-09-26

METHOD AND APPARATUS FOR PRODUCING PRODUCT NITROGEN GAS AND PRODUCT ARGON

#48
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

#49
20190049178
2019-02-14

METHOD FOR DE-ICING A DEVICE FOR SEPARATING AIR BY CRYOGENIC DISTILLATION AND DEVICE ADAPTED TO BE DE-ICED USING THIS METHOD

#50
20190049177
2019-02-14

Apparatus and method for separation of air by cryogenic distillation

#51
20190041130
2019-02-07

Method and device for separating air by cryogenic distillation

#52
20190041129
2019-02-07

Device and method for separating air by cryogenic distillation

#53
20180363977
2018-12-20

PROCESS FOR REMOVING NITROGEN FROM NATURAL GAS

#54
20180356152
2018-12-13

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

#55
20180328659
2018-11-15

METHODS FOR RECOVERING NITROGEN FROM PROCESS GAS STREAMS

#56
20180306497
2018-10-25

Nitrogen production system for producing nitrogen with different purities and nitrogen production process thereof

#57
20180080710
2018-03-22

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

#58
20180080709
2018-03-22

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

#59
20180080708
2018-03-22

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

#60
20180017322
2018-01-18

Method and apparatus for producing compressed nitrogen and liquid nitrogen by cryogenic separation of air

#61
20180003437
2018-01-04

Method for operating an air separation plant

#62
20180003435
2018-01-04

Apparatus for operating an air separation plant

#63
20180003434
2018-01-04

Apparatus for the production of air gases by the cryogenic separation of air

#64
20180003433
2018-01-04

Method for the production of air gases by the cryogenic separation of air

#65
20170299261
2017-10-19

Liquid nitrogen production

#66
20170268821
2017-09-21

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

#67
20170268820
2017-09-21

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

#68
20170234614
2017-08-17

Method for the cryogenic separation of air and air separation plant

#69
20170211879
2017-07-27

Process and apparatus for producing pressurized gaseous nitrogen by cryogenic separation of air

#70
20170205142
2017-07-20

Method for obtaining an air product in an air separation plant and air separation plant

#71
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

#72
20170038135
2017-02-09

METHOD FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS AND LIQUID NITROGEN

#73
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

#74
20170038132
2017-02-09

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

#75
20170016668
2017-01-19

Increasing efficiency in an LNG production system by pre-cooling a natural gas feed stream

#76
20170003071
2017-01-05

PURIFYING CRYOGENIC FLUIDS

#77
20160138865
2016-05-19

Method and apparatus for separating a liquefiable gas mixture

#78
20150300733
2015-10-22

Nitrogen removal with ISO-pressure open refrigeration natural gas liquids recovery

#79
20150068247
2015-03-12

Distillation device

#80
20140130541
2014-05-15

Nitrogen removal with ISO-pressure open refrigeration natural gas liquids recovery

#81
20110100055
2011-05-05

Hybrid Air Separation Method with Noncryogenic Preliminary Enrichment and Cryogenic Purification Based on a Single Component Gas or Liquid Generator

#82
20100223950
2010-09-09

Nitrogen removal with iso-pressure open refrigeration natural gas liquids recovery

#83
20100206711
2010-08-19

Method for concentrating nitrogen isotope

#84
20080307961
2008-12-18

CENTRIFUGAL SEPARATION OF RARE GASES

#85
20080271466
2008-11-06

Method and System for Purifying Liquified Gases

#86
20070075011
2007-04-05

Installation and method for purifying a cryogenic liquid

#87
20060000223
2006-01-05

Desiccant cartridge

#88
17658605
2023-04-25

Liquid or supercritical carbon dioxide capture from exhaust gas

#89
12800637
2017-08-08

Liquid nitrogen production