ClassID:

160347

F25J2200/72 - CPC Classification

Classification description:

Processes or apparatus using separation by rectification Refluxing the column with at least a part of the totally condensed overhead gas

Recent Application in this class:
#1
20260139898
2026-05-21

SIDE DRAW REFLUX HEAVY HYDROCARBON REMOVAL SYSTEM AND METHOD

#2
20260055958
2026-02-26

NITROGEN SEPARATION COLUMN SYSTEMS

#3
20250334332
2025-10-30

LIQUID NITROGEN GENERATOR AND PROCESS

#4
20250264274
2025-08-21

AIR SEPARATION UNIT

#5
20250262584
2025-08-21

NOx REMOVAL FOR CRYOGENIC CARBON CAPTURE FROM FLUE GAS

#6
20250251189
2025-08-07

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

#7
20250146746
2025-05-08

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

#8
20250101329
2025-03-27

Methane Purification System and Method

#9
20250060158
2025-02-20

NITROGEN GENERATING DEVICE AND NITROGEN GENERATING METHOD

#10
20240353173
2024-10-24

ULTRA-HIGH-PURITY OXYGEN PRODUCTION METHOD AND ULTRA-HIGH-PURITY OXYGEN PRODUCTION APPARATUS

#11
20240337441
2024-10-10

LEAN GAS LNG HEAVIES REMOVAL PROCESS USING NGL

#12
20240067590
2024-02-29

Reflux arrangement for distillation columns

#13
20240060716
2024-02-22

Processes and Systems for Separating Liquified Natural Gas

#14
20230375263
2023-11-23

GAS PROCESSING METHODOLOGY UTILIZING REFLUX AND ADDITIONALLY SYNTHESIZED STREAM OPTIMIZATION

#15
20230235955
2023-07-27

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

#16
20230050296
2023-02-16

Cryogenic air separation unit with argon condenser vapor recycle

#17
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

#18
20220082325
2022-03-17

Multistage liquid storage-type condenser-evaporator and nitrogen production device using the same

#19
20210310733
2021-10-07

METHOD FOR RECYCLING ARGON

#20
20210285721
2021-09-16

LNG production with nitrogen removal

#21
20210180864
2021-06-17

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

#22
20210180863
2021-06-17

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

#23
20210172677
2021-06-10

CRYOGENIC PROCESS FOR REMOVING NITROGEN FROM A DISCHARGE GAS

#24
20210131729
2021-05-06

Hydrocarbon gas processing

#25
20210130264
2021-05-06

Method and system for obtaining one or more olefins

#26
20210123671
2021-04-29

METHOD AND APPARATUS FOR SEPARATING AIR BY CRYOGENIC DISTILLATION

#27
20210095918
2021-04-01

Lean gas LNG heavies removal process using NGL

#28
20200386475
2020-12-10

Method to recover LPG and condensates from refineries fuel gas streams

#29
20200378682
2020-12-03

USE OF DENSE FLUID EXPANDERS IN CRYOGENIC NATURAL GAS LIQUIDS RECOVERY

#30
20200340740
2020-10-29

Single column nitrogen rejection unit with side draw heat pump reflux system and method

#31
20200284507
2020-09-10

Methods for providing refrigeration in natural gas liquids recovery plants

#32
20200232703
2020-07-23

System and method for removing freezing components from a feed gas

#33
20200224968
2020-07-16

Process and plant for separatory processing of a starting mixture

#34
20200116427
2020-04-16

OVERHEAD RECYCLE PROCESS APPARATUS AND METHOD OF OVERHEAD RECYCLE PROCESSING OF HYDROCARBONS

#35
20200088465
2020-03-19

Helium Extraction from Natural Gas

#36
20190277564
2019-09-12

Pump reservoir, rectification system and process for low-temperature rectification

#37
20190204007
2019-07-04

System and method for removing freezing components from a feed gas

#38
20190136141
2019-05-09

Apparatus for separation and recovery of hydrocarbons from LNG

#39
20190128600
2019-05-02

Method and apparatus for separating hydrocarbons

#40
20190049176
2019-02-14

METHODS FOR PROVIDING REFRIGERATION IN NATURAL GAS LIQUIDS RECOVERY PLANTS

#41
20190041128
2019-02-07

Recovery Of Helium From Nitrogen-Rich Streams

#42
20190003766
2019-01-03

System and method for rare gas recovery

#43
20180356152
2018-12-13

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

#44
20180274854
2018-09-27

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

#45
20180257001
2018-09-13

Packed column

#46
20180252469
2018-09-06

Method for removing a foulant from a gas stream with minimal external refrigeration

#47
20180202713
2018-07-19

Method and system for cooling and separating a hydrocarbon stream

#48
20180106535
2018-04-19

Heat exchangers for low temperature carbon dioxide separation from natural gas

#49
20180080710
2018-03-22

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

#50
20180080709
2018-03-22

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

#51
20180080708
2018-03-22

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

#52
20180073803
2018-03-15

Process for the production of dilute ethylene

#53
20180023889
2018-01-25

Heavy hydrocarbon removal system for lean natural gas liquefaction

#54
20180003430
2018-01-04

Mixed refrigerant liquefaction system and method

#55
20170320793
2017-11-09

Method and apparatus for producing hydrocarbons

#56
20170268820
2017-09-21

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

#57
20170234612
2017-08-17

Treatment of nitrogen-rich natural gas streams

#58
20170211879
2017-07-27

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

#59
20170198967
2017-07-13

Separation method and separation process system for recovering ethylene

#60
20170176097
2017-06-22

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

#61
20170122661
2017-05-04

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

#62
20170102182
2017-04-13

Method and arrangement for producing liquefied methane gas (LMG) from various gas sources

#63
20170051971
2017-02-23

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

#64
20170051970
2017-02-23

Ethane recovery and ethane rejection methods and configurations

#65
20170023293
2017-01-26

Configurations and methods for nitrogen rejection, LNG and NGL production from high nitrogen feed gases

#66
20160348964
2016-12-01

Method for separating a hydrocarbon mixture containing hydrogen, separating device, and olefin plant

#67
20160252298
2016-09-01

System and Method for the Production of Liquefied Natural Gas

#68
20160245583
2016-08-25

Method and apparatus for cryogenic separation of a mixture containing at least carbon monoxide, hydrogen and nitrogen

#69
20160187058
2016-06-30

Ethane recovery methods and configurations

#70
20150184932
2015-07-02

Process for recovering hydrocarbons from crude carbon dioxide fluid

#71
20150068247
2015-03-12

Distillation device

#72
20140338396
2014-11-20

Methods for separating hydrocarbon gases

#73
20140260420
2014-09-18

Flexible NGL recovery methods and configurations

#74
20140007616
2014-01-09

Ethane recovery and ethane rejection methods and configurations

#75
20130068220
2013-03-21

Systems and methods for generating liquid oxygen for portable use

#76
20130061633
2013-03-14

CONFIGURATIONS AND METHODS OF INTEGRATED NGL RECOVERY AND LNG LIQUEFACTION

#77
20130061632
2013-03-14

Integrated NGL Recovery In the Production Of Liquefied Natural Gas

#78
20120198883
2012-08-09

Method for cooling a single-component or multi-component stream

#79
20120137726
2012-06-07

NGL recovery from natural gas using a mixed refrigerant

#80
20120097520
2012-04-26

PROCESS AND APPARATUS FOR SEPARATION OF HYDROCARBONS AND NITROGEN

#81
20120070364
2012-03-22

High pressure cyrogenic process and system for producing ammonia products

#82
20120067081
2012-03-22

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

#83
20120047946
2012-03-01

Method for separating off nitrogen from natural gas

#84
20120041248
2012-02-16

Process for removing nitrogen

#85
20120017640
2012-01-26

PROCESS FOR SEPARATING OFF NITROGEN

#86
20110257276
2011-10-20

Process and apparatus for the production of hydrocarbon compounds from methane

#87
20110209499
2011-09-01

METHOD FOR REMOVING NITROGEN

#88
20110209498
2011-09-01

PROCESS FOR SEPARATING OFF NITROGEN

#89
20110167868
2011-07-14

Hydrocarbon gas processing

#90
20110146344
2011-06-23

Process and apparatus for the separation of air by cryogenic distillation

#91
20110132034
2011-06-09

TWO STAGE PROCESS FOR PRODUCING PURIFIED GAS

#92
20110120183
2011-05-26

Liquefied natural gas production

#93
20110100055
2011-05-05

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

#94
20110041389
2011-02-24

Process for Separating Off Nitrogen from Natural Gas

#95
20110036120
2011-02-17

METHOD AND APPARATUS FOR RECOVERING AND FRACTIONATING A MIXED HYDROCARBON FEED STREAM

#96
20100287982
2010-11-18

Liquefied Natural Gas and Hydrocarbon Gas Processing

#97
20100242537
2010-09-30

PROCESS AND APPARATUS FOR CRYOGENIC AIR SEPARATION

#98
20100206004
2010-08-19

Main Exchange Line And Cryogenic Distillation Air Separation Unit Incorporating Such An Exchange Line

#99
20100199718
2010-08-12

Storage enclosure, method and apparatus for producing carbon monoxide and/or hydrogen by means of cryogenic separation, including one such enclosure

#100
20100162754
2010-07-01

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

#101
20100154471
2010-06-24

Imported LNG treatment

#102
20100108487
2010-05-06

Dividing wall column with a heat pump

#103
20100037655
2010-02-18

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

#104
20100031700
2010-02-11

Liquefied natural gas and hydrocarbon gas processing

#105
20100011809
2010-01-21

Ethane recovery methods and configurations

#106
20100000234
2010-01-07

METHOD AND APPARATUS FOR THE VAPORIZATION OF A LIQUID HYDROCARBON STREAM

#107
20090293538
2009-12-03

NATURAL GAS LIQUEFACTION

#108
20090282865
2009-11-19

Liquefied Natural Gas and Hydrocarbon Gas Processing

#109
20090221864
2009-09-03

High Ethane Recovery Configurations And Methods In LNG Regasification Facility

#110
20090211296
2009-08-27

METHOD AND APPARATUS FOR SEPARATING A FRACTION RICH IN C2+ FROM LIQUEFIED NATURAL GAS

#111
20090194460
2009-08-06

Method and apparatus for treating a hydrocarbon stream

#112
20090120129
2009-05-14

Method for varying liquid production in an air separation plant with use of a variable speed turboexpander

#113
20090078000
2009-03-26

Method and apparatus for separating air

#114
20080302650
2008-12-11

Process to recover low grade heat from a fractionation system

#115
20080264100
2008-10-30

Lng Regasification Configurations and Methods

#116
20080245100
2008-10-09

Gas conditioning process for the recovery of LPG/NGL (C) from LNG

#117
20080216511
2008-09-11

Nitrogen production method and apparatus

#118
20080196585
2008-08-21

Process for vaporizing the product COat two different pressures during COseparation

#119
20080196584
2008-08-21

Process for feed gas cooling in reboiler during COseparation

#120
20080196583
2008-08-21

PROCESS FOR RECYCLING OF TOP GAS DURING CO2 SEPARTION

#121
20080060380
2008-03-13

Process and system to produce multiple distributable products from source, or imported LNG

#122
20080029381
2008-02-07

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

#123
20080028790
2008-02-07

Natural gas liquefaction

#124
20080016910
2008-01-24

Integrated NGL recovery in the production of liquefied natural gas

#125
20070245771
2007-10-25

Dual stage nitrogen rejection from liquefied natural gas

#126
20070157663
2007-07-12

Configurations and methods of integrated NGL recovery and LNG liquefaction

#127
20070056318
2007-03-15

Enhanced heavies removal/LPG recovery process for LNG facilities

#128
20060230783
2006-10-19

Nitrogen rejection method and apparatus

#129
20060144081
2006-07-06

Method and installation for producing treated natural gas, a C3+ hydrocarbon cut and an ethane rich stream

#130
20060074132
2006-04-06

Process and apparatus for the production of hydrocarbon compounds from methane

#131
20060065015
2006-03-30

Recovering natural gas liquids from LNG using vacuum distillation

#132
20060000234
2006-01-05

Liquefied natural gas processing

#133
20050268649
2005-12-08

Natural gas liquefaction