REFRIGERANT RECOVERY IN NATURAL GAS LIQUEFACTION PROCESSES

Title:

REFRIGERANT RECOVERY IN NATURAL GAS LIQUEFACTION PROCESSES

Document Type and Number:

Japanese Patent JP2016080344

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To provide a method of refrigerant recovery in natural gas liquefaction processes.SOLUTION: Described herein is a method of removing a refrigerant from a natural gas liquefaction system in which a vaporized mixed refrigerant is withdrawn from a closed-loop refrigeration circuit and introduced into a distillation column so as to be separated into an overhead vapor rich in methane and a bottoms liquid rich in heavier components. The overhead vapor is withdrawn from the distillation column to form a methane-rich stream, and the methane-rich stream of the refrigerant is removed from the liquefaction system, and bottoms liquid is reintroduced from the distillation column into the closed-loop refrigeration circuit. Also described are methods of altering the rate of production in a natural gas liquefaction system in which a refrigerant is removed as described above, and a natural gas liquefaction systems in which such methods can be implemented.SELECTED DRAWING: Figure 1

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Inventors:

BRIAN KEITH JOHNSTON
GOWRI KRISHNAMURTHY
ROBERTS MARK J

Application Number:

JP2015197408A

Publication Date:

May 16, 2016

Filing Date:

October 05, 2015

Export Citation:

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Assignee:

AIR PROD & CHEM

International Classes:

F25J1/00; F25D15/00; F25J1/02

Domestic Patent References:

JPS507781A	1975-01-27
JPS6325481A	1988-02-02
JP2011506894A	2011-03-03
JP2012531575A	2012-12-10
JP2013506105A	2013-02-21

Foreign References:

US3945214A	1976-03-23
US4586942A	1986-05-06
US20100293996A1	2010-11-25
US20120017639A1	2012-01-26

Attorney, Agent or Firm:

Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Atsushi Ebiya
Naori Kota
Satoshi Deno
Kenji Kimura

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