ClassID:

160093

F25J1/025 - CPC Classification

Classification description:

Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process; Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used; Operation; Control and regulation; Instrumentation; Different modes, i.e. 'runs', of operation; Process control; Controlling refrigerant inventory, i.e. composition or quantity Details related to the refrigerant production or treatment, e.g. make-up supply from feed gas itself

Recent Application in this class:
#1
20250257939
2025-08-14

SYSTEMS AND METHODS FOR LNG REFRIGERATION AND LIQUEFACTION

#2
20250075972
2025-03-06

DEVICE AND METHOD FOR LIQUEFYING A GAS

#3
20230168029
2023-06-01

REFRIGERANT AND NITROGEN RECOVERY

#4
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

#5
20220074652
2022-03-10

Natural gas liquefaction by a high pressure expansion process

#6
20210381756
2021-12-09

COOLING METHOD FOR LIQUEFYING A FEED GAS

#7
20210364229
2021-11-25

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

#8
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

#9
20200232704
2020-07-23

Systems and methods for using multiple cryogenic hydraulic turbines

#10
20190368793
2019-12-05

A METHOD AND SYSTEM FOR REDUCING PROPANE CONTENT IN A REFRIGERANT CONTAINING PROPANE

#11
20190204006
2019-07-04

Systems and methods for LNG refrigeration and liquefaction

#12
20190120548
2019-04-25

Natural Gas Liquefaction by a High Pressure Expansion Process using Multiple Turboexpander Compressors

#13
20180347897
2018-12-06

Large-scale hydrogen liquefaction by means of a high pressure hydrogen refrigeration cycle combined to a novel single mixed-refrigerant precooling

#14
20180320958
2018-11-08

Method of control of the natural gas liquefaction process

#15
20180320957
2018-11-08

Low-temperature mixed-refrigerant for hydrogen precooling in large scale

#16
20180313604
2018-11-01

Hydrogen-neon mixture refrigeration cycle for large-scale hydrogen cooling and liquefaction

#17
20180306498
2018-10-25

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

#18
20180209724
2018-07-26

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

#19
20180120007
2018-05-03

Gas recovery system, compressor system, and refrigeration cycle system

#20
20180058752
2018-03-01

Refrigerant recovery in natural gas liquefaction processes

#21
20170343280
2017-11-30

Refrigerant vent rectifier and efficiency booster

#22
20170016668
2017-01-19

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

#23
20170003072
2017-01-05

Systems and methods for using multiple cryogenic hydraulic turbines

#24
20160305708
2016-10-20

Device and method for cooling and/or low-temperature liquefaction

#25
20160131115
2016-05-12

Systems and methods of utilizing axial flow expanders

#26
20160102908
2016-04-14

Refrigerant recovery in natural gas liquefaction processes

#27
20140250911
2014-09-11

Power generation and LNG production

#28
20140075986
2014-03-20

Production of ethane for start-up of an LNG train

#29
20140053598
2014-02-27

Liquefier system

#30
20130340475
2013-12-26

Natural gas liquefaction employing independent refrigerant path

#31
20130327085
2013-12-12

Semi-closed loop LNG process

#32
20130213088
2013-08-22

Systems and methods for separating hydrocarbons using one or more dividing wall columns

#33
20130192301
2013-08-01

Method and system for air separation using a supplemental refrigeration cycle

#34
20130104597
2013-05-02

Helium-recovery plant

#35
20120289407
2012-11-15

Superconducting system for enhanced natural gas production

#36
20120279239
2012-11-08

Method and device for low-temperature cooling/liquefaction

#37
20120017639
2012-01-26

METHODS AND SYSTEMS FOR STORING AND TRANSPORTING GASES

#38
20110048067
2011-03-03

Natural gas liquefaction method with high-pressure fractionation

#39
20110036121
2011-02-17

Refrigerant composition control

#40
20100293996
2010-11-25

METHOD AND APPARATUS FOR LIQUEFYING A HYDROCARBON STREAM AND FLOATING VESSEL OR OFFSHORE PLATFORM COMPRISING THE SAME

#41
20100281915
2010-11-11

Pre-Cooled Liquefaction Process

#42
20100218551
2010-09-02

Method for utilization of lean boil-off gas stream as a refrigerant source

#43
20100212354
2010-08-26

METHOD OF DISPOSING OF CARBON DIOXIDE

#44
20100186445
2010-07-29

Natural gas liquefaction processes with feed gas refrigerant cooling loops

#45
20100126214
2010-05-27

Process for the production of a subcooled liquefied natural gas stream from a natural gas feed stream, and associated installation

#46
20100107684
2010-05-06

Natural gas liquefaction process

#47
20090260392
2009-10-22

METHOD OF LIQUEFYING A HYDROCARBON-RICH FRACTION

#48
20090217701
2009-09-03

Natural Gas Liquefaction Process for Ling

#49
20090199579
2009-08-13

Process for cooling a storage container

#50
20090090049
2009-04-09

PROCESS FOR PRODUCING LIQEFIED NATURAL GAS FROM HIGH CO2 NATURAL GAS

#51
20080256976
2008-10-23

SEMI-CLOSED LOOP LNG PROCESS

#52
20080163645
2008-07-10

NATURAL GAS PROCESSING METHOD

#53
20080115530
2008-05-22

Contaminant removal system for closed-loop refrigeration cycles of an LNG facility

#54
20060230766
2006-10-19

Circulation-type liquid helium reliquefaction apparatus with contaminant discharge function, method of discharging contaminant from the apparatus, and refiner and transfer tube both of which are used for the apparatus

#55
20050279133
2005-12-22

Semi-closed loop LNG process