PROCESS FOR LIQUEFACTION OF NATURAL GAS

Title:

PROCESS FOR LIQUEFACTION OF NATURAL GAS

Document Type and Number:

WIPO Patent Application WO/2012/172281

Kind Code:

A3

Abstract:

A process comprising: cooling natural gas with a heat exchanger and a first expander. The heat exchanger cools the feed natural gas to temperature higher than the outlet temperature of the expander, reheating the expander outlet stream in a first cold passage of the heat exchanger to slightly below the temperature of the feed natural gas to the heat exchanger, passing the cold outlet stream from the heat exchanger into a second expander wherein it is partly liquefied, separating the outlet stream of second expander into liquid and vapour fractions, collecting the liquid fraction for use as LNG product, reheating the vapour fraction in a second cold side passage of the heat exchanger to substantially the same temperature as the temperature of the feed natural gas to the heat exchanger, recycling the reheated vapour fraction partly as feed to the first expander and partly as feed to the heat exchanger.

Inventors:

MAUNDER ANTHONY DWIGHT (GB)
SKINNER GEOFFREY FREDERICK (GB)

Application Number:

PCT/GB2012/000502

Publication Date:

December 05, 2013

Filing Date:

June 11, 2012

Export Citation:

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Assignee:

GASCONSULT LTD (GB)
MAUNDER ANTHONY DWIGHT (GB)
SKINNER GEOFFREY FREDERICK (GB)

International Classes:

F25J1/00

Domestic Patent References:

WO2001044735A1

2001-06-21

Foreign References:

US5651269A	1997-07-29
US3677019A	1972-07-18

Other References:

BECKER R: "VERFAHREN ZUR ERDGAS (CH4) - VERFLUESSIGUNG", BERICHTE AUS TECHNIK UND WISSENSCHAFT, LINDE AG. WIESBADEN, DE, no. 18, 1 January 1964 (1964-01-01), pages 4 - 06, XP009023521, ISSN: 0942-332X