Title:
【発明の名称】膨張冷却による天然ガスの液化方法
Document Type and Number:
Japanese Patent JP2003517561
Kind Code:
A
Abstract:
This invention relates to process for liquefying a pressurized gas stream rich in methane. In a first step of the process, a first fraction of a pressurized feed stream, preferably at a pressure above 11,000 kPa, is withdrawn and entropically expanded to a lower pressure to cool and at least partially liquefy the withdrawn first fraction. A second fraction of the feed stream is cooled by indirect heat exchange with the expanded first fraction. The second fraction is subsequently expanded to a lower pressure, thereby at least partially liquefying the second fraction of the pressurized gas stream. The liquefied second fraction is withdrawn from the process as a pressurized product stream having a temperature above -112° C. and a pressure at or above its bubble point pressure.
Inventors:
Minta Moses
Bowen Ronald Earl
Stone John Bee
Bowen Ronald Earl
Stone John Bee
Application Number:
JP2001545786A
Publication Date:
May 27, 2003
Filing Date:
December 12, 2000
Export Citation:
Assignee:
Exxon Mobil Upstream Research Company
International Classes:
F25B9/06; C09K5/04; F25J1/00; F25J1/02; (IPC1-7): F25J1/00; C09K5/04; F25B9/06
Domestic Patent References:
| JPH08507364A | 1996-08-06 | |||
| JPS4936866B1 | 1974-10-03 | |||
| JPS60191175A | 1985-09-28 | |||
| JP2002508498A | 2002-03-19 | |||
| JPS3620011B1 | ||||
| JPS5440512B1 | 1979-12-04 |
Foreign References:
| WO1998059205A2 | 1998-12-30 |
Attorney, Agent or Firm:
Minoru Nakamura (9 outside)