ClassID:

160334

F25J2200/06 - CPC Classification

Classification description:

Processes or apparatus using separation by rectification in a dual pressure main column system in a classical double column flow-sheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column

Recent Application in this class:
#1
20260104200
2026-04-16

PRODUCING LNG FROM METHANE CONTAINING SYNTHETIC GAS

#2
20260036366
2026-02-05

HEAT EXCHANGER

#3
20260035243
2026-02-05

SYSTEM AND METHOD FOR PRODUCTION OF ULTRA-HIGH PURITY OXYGEN

#4
20250334332
2025-10-30

LIQUID NITROGEN GENERATOR AND PROCESS

#5
20250327618
2025-10-23

ETHANE RECOVERY SYSTEM SUITABLE FOR RICH GAS WITH HIGH CARBON DIOXIDE CONTENT AND RECOVERY METHOD THEREFOR

#6
20250314424
2025-10-09

Apparatus and Process for Improved Argon Recovery

#7
20250264274
2025-08-21

AIR SEPARATION UNIT

#8
20250251189
2025-08-07

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

#9
20250223245
2025-07-10

PROCESS AND DEVICE FOR PRODUCING LIQUID METHANE

#10
20250207852
2025-06-26

OPEN LOOP LIQUEFACTION PROCESS WITH NGL RECOVERY

#11
20250146746
2025-05-08

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

#12
20250101329
2025-03-27

Methane Purification System and Method

#13
20250003679
2025-01-02

AIR SEPARATION SYSTEM AND AIR SEPARATION METHOD

#14
20240401877
2024-12-05

Nitrogen Rejection Unit System and Method for Low Nitrogen Concentration Feeds

#15
20240393043
2024-11-28

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

#16
20240377131
2024-11-14

PLANT AND PROCESS FOR LOW-TEMPERATURE FRACTIONATION OF AIR

#17
20240377129
2024-11-14

PLANT AND METHOD FOR LOW-TEMPERATURE AIR SEPARATION

#18
20240191941
2024-06-13

ETHANE SEPARATION WITH OVERHEAD CRYOGENIC HEAT EXCHANGER

#19
20240125550
2024-04-18

Process and Apparatus for Improved Recovery of Argon

#20
20240125549
2024-04-18

Open Loop Liquefaction Process with NGL Recovery

#21
20240067590
2024-02-29

Reflux arrangement for distillation columns

#22
20240044578
2024-02-08

METHOD FOR SEPARATING AIR BY CRYOGENIC DISTILLATION

#23
20240035743
2024-02-01

Process and apparatus for recovery of at least nitrogen and argon

#24
20240011706
2024-01-11

METHOD FOR REGULATING A DEVICE FOR SEPARATING AIR BY CRYOGENIC DISTILLATION

#25
20240003620
2024-01-04

PROCESS AND PLANT FOR CRYOGENIC SEPARATION OF AIR

#26
20230375263
2023-11-23

GAS PROCESSING METHODOLOGY UTILIZING REFLUX AND ADDITIONALLY SYNTHESIZED STREAM OPTIMIZATION

#27
20230358468
2023-11-09

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

#28
20230235955
2023-07-27

System and Method for Separating Methane and Nitrogen with Reduced Horsepower Demands

#29
20230168030
2023-06-01

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

#30
20230055205
2023-02-23

NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT WITH EXCESS AIR CIRCUIT

#31
20230050296
2023-02-16

Cryogenic air separation unit with argon condenser vapor recycle

#32
20230003444
2023-01-05

Producing LNG from Methane Containing Synthetic Gas

#33
20220397343
2022-12-15

FACILITY FOR THE SEPARATION AND LIQUEFACTION OF METHANE AND CO2 COMPRISING A VAPO/CONDENSER PLACED IN AN INTERMEDIATE STAGE OF THE DISTILLATION COLUMN

#34
20220325951
2022-10-13

Method for separating a mixture containing at least nitrogen and methane

#35
20220260312
2022-08-18

PROCESS AND PLANT FOR LOW-TEMPERATURE FRACTIONATION OF AIR

#36
20220221221
2022-07-14

Fluid recovery process and apparatus

#37
20220128301
2022-04-28

METHOD AND APPARATUS FOR PRODUCING HIGH-PRESSURE NITROGEN

#38
20210372698
2021-12-02

ENHANCEMENTS TO A DUAL COLUMN NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT

#39
20210364233
2021-11-25

Method and apparatus for separating air by cryogenic distillation

#40
20210364232
2021-11-25

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

#41
20210180864
2021-06-17

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

#42
20210131729
2021-05-06

Hydrocarbon gas processing

#43
20210130264
2021-05-06

Method and system for obtaining one or more olefins

#44
20200271381
2020-08-27

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

#45
20200149806
2020-05-14

SYSTEM AND METHOD FOR ENHANCED RECOVERY OF ARGON AND OXYGEN FROM A NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT

#46
20200132367
2020-04-30

Method and apparatus for air separation by cryogenic distillation

#47
20200088466
2020-03-19

Helium extraction from natural gas

#48
20190376741
2019-12-12

LNG PROCESS FOR VARIABLE PIPELINE GAS COMPOSITION

#49
20190368810
2019-12-05

Method and installation for cryogenic separation of a gaseous mixture by methane scrubbing

#50
20190331418
2019-10-31

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

#51
20190331416
2019-10-31

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

#52
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

#53
20190003766
2019-01-03

System and method for rare gas recovery

#54
20180363977
2018-12-20

PROCESS FOR REMOVING NITROGEN FROM NATURAL GAS

#55
20180356152
2018-12-13

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

#56
20180306498
2018-10-25

Method and system for preparing a lean methane-containing gas stream

#57
20180209725
2018-07-26

PRODUCTION OF HELIUM FROM A STREAM OF NATURAL GAS

#58
20180149426
2018-05-31

Process for increasing low pressure pure nitrogen production by revamping original apparatus for cryogenic air separation

#59
20180051215
2018-02-22

Method for removing nitrogen from a hydrocarbon-rich fraction

#60
20180038645
2018-02-08

Plant for producing oxygen by cryogenic air separation

#61
20180038644
2018-02-08

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

#62
20180038642
2018-02-08

PROCESS INTEGRATION OF A GAS PROCESSING UNIT WITH LIQUEFACTION UNIT

#63
20180038641
2018-02-08

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

#64
20180038638
2018-02-08

Integration of industrial gas site with liquid hydrogen production

#65
20180003437
2018-01-04

Method for operating an air separation plant

#66
20180003435
2018-01-04

Apparatus for operating an air separation plant

#67
20180003434
2018-01-04

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

#68
20180003433
2018-01-04

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

#69
20170268821
2017-09-21

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

#70
20170268820
2017-09-21

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

#71
20170211878
2017-07-27

Method and unit for separating the light and heavy components of natural gas

#72
20170176097
2017-06-22

Systems and Methods for Recovering Desired Light Hydrocarbons from Refinery Waste Gas Using a Back-End Turboexpander

#73
20170122661
2017-05-04

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

#74
20170030637
2017-02-02

Method for the production of low pressure gaseous oxygen

#75
20170003073
2017-01-05

METHOD AND APPARATUS FOR SEPARATION AT SUBAMBIENT TEMPERATURE

#76
20160258678
2016-09-08

Condenser-reboiler system and method with perforated vent tubes

#77
20160245584
2016-08-25

Method for denitrogenation of natural gas with or without helium recovery

#78
20160131425
2016-05-12

System and method for production of crude argon by cryogenic rectification of air

#79
20160123662
2016-05-05

Method and device for oxygen production by low-temperature separation of air at variable energy consumption

#80
20160076809
2016-03-17

Condenser-reboiler system and method with perforated vent tubes

#81
20150369534
2015-12-24

Natural gas isobaric liquefaction apparatus

#82
20150362250
2015-12-17

Natural gas isobaric liquefaction apparatus

#83
20150354888
2015-12-10

Air separation apparatus to produce oxygen and nitrogen through isobaric separation

#84
20150316318
2015-11-05

System and method for production of argon by cryogenic rectification of air

#85
20140260422
2014-09-18

Low temperature air separation process for producing pressurized gaseous product

#86
20120297823
2012-11-29

Method and appliance for separating air by cryogenic distillation

#87
20120090355
2012-04-19

PROCESS AND APPARATUS FOR SEPARATION OF HYDROCARBONS AND NITROGEN

#88
20120041248
2012-02-16

Process for removing nitrogen

#89
20120017640
2012-01-26

PROCESS FOR SEPARATING OFF NITROGEN

#90
20110277500
2011-11-17

Nitrogen removal from natural gas

#91
20110209499
2011-09-01

METHOD FOR REMOVING NITROGEN

#92
20110209498
2011-09-01

PROCESS FOR SEPARATING OFF NITROGEN

#93
20110192193
2011-08-11

Method And Installation For Enriching A Gas Stream With One Of The Components Thereof

#94
20090007595
2009-01-08

Low temperature air separation process for producing pressurized gaseous product

#95
20080223076
2008-09-18

Cryogenic Distillation Method and Installation for Air Separation

#96
20080034790
2008-02-14

Method And Installation For Enriching A Gas Stream With One Of The Components Thereof

#97
20080029381
2008-02-07

Distillation Installation Comprising Columns With Corrugated-Crossed Structured Packings And Method Of Increasing The Capacity Of A Distillation Installation

#98
20070221492
2007-09-27

Method and Installation for Supplying Highly Pure Oxygen By Cryogenic Distillation of Air

#99
20070186582
2007-08-16

Air-seperation apparatus, integrated air-separation and metal-production apparatus, and method of starting one such air-separation apparatus

#100
20070137248
2007-06-21

Method and apparatus for separating air by cryogenic distillation

#101
20060272352
2006-12-07

Air separator

#102
20060230783
2006-10-19

Nitrogen rejection method and apparatus

#103
20060010912
2006-01-19

Low temperature air separation process for producing pressurized gaseous product