ClassID:

160488

F25J2245/42 - CPC Classification

Classification description:

Processes or apparatus involving steps for recycling of process streams the recycled stream being nitrogen

Recent Application in this class:
#1
20250264274
2025-08-21

AIR SEPARATION UNIT

#2
20250060158
2025-02-20

NITROGEN GENERATING DEVICE AND NITROGEN GENERATING METHOD

#3
20240288218
2024-08-29

METHOD FOR PRODUCTION AND SUPPLY OF A DENSIFIED LIQUID OXYGEN PRODUCT FOR SPACE VEHICLE APPLICATIONS

#4
20240230221
2024-07-11

SYSTEM AND METHOD FOR CO-PRODUCTION OF A DENSIFIED LIQUID OXYGEN PRODUCT AND DENSIFIED LIQUID METHANE PRODUCT

#5
20240183610
2024-06-06

METHOD AND PLANT FOR LOW TEMPERATURE FRACTIONATION OF AIR

#6
20240035742
2024-02-01

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

#7
20240011706
2024-01-11

METHOD FOR REGULATING A DEVICE FOR SEPARATING AIR BY CRYOGENIC DISTILLATION

#8
20230358468
2023-11-09

PROCESS AND APPARATUS FOR CRYOGENIC SEPARATION OF AIR WITH MIXED GAS TURBINE

#9
20230358466
2023-11-09

METHOD FOR OBTAINING ONE OR MORE AIR PRODUCTS, AND AIR FRACTIONATION PLANT

#10
20230296314
2023-09-21

ARGON ENHANCING METHOD AND DEVICE

#11
20230288139
2023-09-14

Systems and methods for natural gas cooling

#12
20230221069
2023-07-13

Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit

#13
20230213278
2023-07-06

APPARATUS FOR PRECOOLING HYDROGEN FOR LIQUEFACTION USING EXTERNAL LIQUID NITROGEN AND HIGH PRESSURE GASEOUS NITROGEN

#14
20230213273
2023-07-06

INTEGRATED INDUSTRIAL UNIT

#15
20230168030
2023-06-01

PROCESS FOR CRYOGENIC FRACTIONATION OF AIR, AIR FRACTIONATION PLANT AND INTEGRATED SYSTEM COMPOSED OF AT LEAST TWO AIR FRACTIONATION PLANTS

#16
20230103843
2023-04-06

LOW-PRESSURE NITROGEN TURBINE WITH AIR BOOSTER PARALLEL TO THE BOOSTER AIR COMPRESSOR

#17
20230038170
2023-02-09

PROCESS AND PLANT FOR LOW-TEMPERATURE SEPARATION OF AIR

#18
20220282914
2022-09-08

Process and apparatus for the separation of air by cryogenic distillation

#19
20220221221
2022-07-14

Fluid recovery process and apparatus

#20
20220146196
2022-05-12

SYSTEM AND METHOD FOR FLEXIBLE RECOVERY OF ARGON FROM A CRYOGENIC AIR SEPARATION UNIT

#21
20220146195
2022-05-12

METHOD FOR FLEXIBLE RECOVERY OF ARGON FROM A CRYOGENIC AIR SEPARATION UNIT

#22
20210285721
2021-09-16

LNG production with nitrogen removal

#23
20210247135
2021-08-12

Systems and methods for natural gas cooling

#24
20210095922
2021-04-01

Method for the production of air gases by the cryogenic separation of air with improved front end purification and air compression

#25
20210055049
2021-02-25

Utilization of nitrogen-enriched streams produced in air separation units comprising split-core main heat exchangers

#26
20200370823
2020-11-26

System and method for small scale LNG production

#27
20200191334
2020-06-18

Method for reheating an atmospheric vaporizer using a gas originating from a cryogenic air separation unit

#28
20190301795
2019-10-03

Integration methods of gas processing plant and nitrogen rejection unit for high nitrogen feed gases

#29
20190242646
2019-08-08

Method and apparatus for obtaining pressurized nitrogen by cryogenic separation of air

#30
20190204009
2019-07-04

System and method for flexible recovery of argon from a cryogenic air separation unit

#31
20190137173
2019-05-09

Method and System for Using a Target Gas Provided by a Gas Decomposition Device

#32
20190128601
2019-05-02

Process and plant for the combination production of a mixture of hydrogen and nitrogen and also of carbon monoxide by cryogenic distillation and cryogenic scrubbing

#33
20180372404
2018-12-27

Method for liquefying natural gas and nitrogen

#34
20180340731
2018-11-29

Method for Recycling Streams in a Separations Process

#35
20180209724
2018-07-26

Continuous mixed refrigerant optimization system for the production of liquefied natural gas (LNG)

#36
20180187837
2018-07-05

Method for reheating an atmospheric vaporizer using a gas originating from a cryogenic air-separation unit

#37
20180038644
2018-02-08

Method for liquefaction of industrial gas by integration of methanol plant and air separation unit

#38
20180038641
2018-02-08

Method for liquefaction of industrial gas by integration of methanol plant and air separation unit

#39
20180038638
2018-02-08

Integration of industrial gas site with liquid hydrogen production

#40
20180023888
2018-01-25

METHOD FOR RECOVERING HELIUM

#41
20180017321
2018-01-18

METHOD FOR RECOVERING GASEOUS NITROGEN FROM THE WASTE NITROGEN STREAM OF AN AIR SEPARATION UNIT

#42
20170276428
2017-09-28

Method for the production of air gases by the cryogenic separation of air with improved front end purification and air compression

#43
20170268819
2017-09-21

Integration methods of gas processing plant and nitrogen rejection unit for high nitrogen feed gases

#44
20170241707
2017-08-24

Method for the capture of carbon dioxide through cryogenically processing gaseous emissions from fossil-fuel power generation

#45
20170211879
2017-07-27

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

#46
20170051971
2017-02-23

Distillation column system and plant for production of oxygen by cryogenic fractionation of air

#47
20170038137
2017-02-09

METHOD FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS AND NITROGEN

#48
20170038132
2017-02-09

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

#49
20160370111
2016-12-22

METHOD FOR PRODUCING AT LEAST ONE AIR PRODUCT, AIR SEPARATION SYSTEM, METHOD AND DEVICE FOR PRODUCING ELECTRICAL ENERGY

#50
20160298900
2016-10-13

Process and apparatus for separating air by cryogenic distillation

#51
20160245586
2016-08-25

Method and device for separating air by cryogenic distillation

#52
20150308734
2015-10-29

Liquefaction of a hydrocarbon-rich fraction

#53
20150300733
2015-10-22

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

#54
20140245782
2014-09-04

Argon production method and apparatus

#55
20140238076
2014-08-28

Nitrogen rejection unit

#56
20140130541
2014-05-15

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

#57
20140114110
2014-04-24

Integration methods of gas processing plant and nitrogen rejection unit for high nitrogen feed gases

#58
20130167557
2013-07-04

POWER PLANT

#59
20130042647
2013-02-21

Production Of High-Pressure Gaseous Nitrogen

#60
20130042646
2013-02-21

Production of high-pressure gaseous nitrogen

#61
20130000351
2013-01-03

Production Of High-Pressure Gaseous Nitrogen

#62
20120297823
2012-11-29

Method and appliance for separating air by cryogenic distillation

#63
20120285197
2012-11-15

PROCESS AND UNIT FOR THE SEPARATION OF AIR BY CRYOGENIC DISTILLATION

#64
20120144861
2012-06-14

Process and installation for producing high-pressure nitrogen

#65
20120096868
2012-04-26

Nitrogen cooled gas turbine with combustor nitrogen injection and partial nitrogen recycling

#66
20120079849
2012-04-05

REMOVAL OF HYDROGEN

#67
20120017640
2012-01-26

PROCESS FOR SEPARATING OFF NITROGEN

#68
20110302955
2011-12-15

Method For Trapping CO2 By Solid Cryocondensation In A Turbine

#69
20110296868
2011-12-08

CO2 Recovery Method Using Cryo-Condensation

#70
20110259194
2011-10-27

System for preventing contaminants from reaching a gas purifier

#71
20110252827
2011-10-20

CO2 Recovery And Cold Water Production Method

#72
20110247491
2011-10-13

Process and apparatus for the treatment of a carbon dioxide-containing gas stream form a large-scale combustion plant

#73
20110214453
2011-09-08

PROCESS AND DEVICE FOR CRYOGENIC AIR FRACTIONATION

#74
20110209499
2011-09-01

METHOD FOR REMOVING NITROGEN

#75
20110146344
2011-06-23

Process and apparatus for the separation of air by cryogenic distillation

#76
20110146343
2011-06-23

Process and apparatus for the separation of air by cryogenic distillation

#77
20110138856
2011-06-16

SEPARATION METHOD AND APPARATUS

#78
20110138855
2011-06-16

Oxygen production method and apparatus

#79
20110132035
2011-06-09

Method And Apparatus For Providing Nitrogen

#80
20110083469
2011-04-14

Process and Device for Obtaining Liquid Nitrogen by Low Temperature Air Fractionation

#81
20110073051
2011-03-31

Oxyfuel combustion boiler plant and operation method of oxyfuel combustion boiler plant

#82
20100275646
2010-11-04

Method of Separating Off Nitrogen from Liquefied Natural Gas

#83
20100223950
2010-09-09

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

#84
20100146929
2010-06-17

Method for increasing the efficiency of a combined gas/steam power station with integrated gasification combined cycle

#85
20100139316
2010-06-10

Operating system of liquefied natural gas ship for subcooling and liquefying boil-off gas

#86
20090178408
2009-07-16

Thermal integration of oxygen plants

#87
20090120294
2009-05-14

System for preventing contaminants from reaching a gas purifier

#88
20090031933
2009-02-05

DISPOSAL METHOD AND EQUIPMENT FOR EXHAUST GAS FROM COMBUSTION SYSTEM

#89
20080308273
2008-12-18

System for separating a waste material from a produced gas and injecting the waste material into a well

#90
20080307966
2008-12-18

System for separating carbon dioxide from a produced gas with a methanol removal system

#91
20080307962
2008-12-18

System for separating carbon dioxide and hydrocarbon gas from a produced gas

#92
20080307706
2008-12-18

System for separating carbon dioxide and hydrocarbon gas from a produced gas combined with nitrogen

#93
20080305019
2008-12-11

System for separating a waste material and hydrocarbon gas from a produced gas and injecting the waste material into a well

#94
20080302240
2008-12-11

System for dehydrating and cooling a produced gas to remove natural gas liquids and waste liquids

#95
20080302239
2008-12-11

System for separating a waste liquid and a hydrocarbon gas from a produced gas

#96
20080302012
2008-12-11

System for separating a waste liquid from a produced gas and injecting the waste liquid into a well

#97
20080190025
2008-08-14

Natural gas processing system

#98
20080127676
2008-06-05

Method and apparatus for production of high-pressure nitrogen from air by cryogenic distillation

#99
20080120993
2008-05-29

Operating system of liquefied natural gas ship for sub-cooling and liquefying boil-off gas

#100
20080066494
2008-03-20

Light component separation from a carbon dioxide mixture

#101
20080000266
2008-01-03

System to increase capacity of LNG-based liquefier in air separation process

#102
20070240451
2007-10-18

Integration of IGCC plant with superconducting power island

#103
20070130992
2007-06-14

Cyrogenic Air Separation Process and Apparatus

#104
20060254312
2006-11-16

Method and installation for producing, in gaseous form and under high pressure, at least one fluid chosen from oxygen, argon and nitrogen by cryogenic distillation of air

#105
20060156758
2006-07-20

Operating system of liquefied natural gas ship for sub-cooling and liquefying boil-off gas

#106
20060101851
2006-05-18

Light component separation from a carbon dioxide mixture

#107
20060075779
2006-04-13

Process for the cryogenic distillation of air

#108
20060010909
2006-01-19

Backup system and method for production of pressurized gas

#109
20050138960
2005-06-30

Cryogenic air separation system for producing elevated pressure nitrogen

#110
20050132746
2005-06-23

Cryogenic air separation process and apparatus