Title:
LIQUEFIED NATURAL GAS PROCESSING
Document Type and Number:
WIPO Patent Application WO2005035692
Kind Code:
A3
Abstract:
A process and apparatus for the recovery of ethane, ethylene, propane, propylene, and heavier hydrocarbons from a liquefied natural gas (LNG) stream is disclosed. The LNG feed stream is directed in heat exchanger relation with a warmer distillation stream rising from the fractionation stages of a distillation column, whereby the LNG feed stream is partially heated and the distillation stream is partially condensed. The partially condensed distillation stream is separated to provide volatile residue gas and a reflux stream, whereupon the reflux stream is supplied to the column at a top column feed position. A portion of the partially heated LNG feed stream is supplied to the column at an upper mid-column feed point, and the remaining portion is heated further to partially or totally vaporize it and thereafter supplied to the column at a lower mid-column feed position. The quantities and temperatures of the feeds to the column are effective to maintain the column overhead temperature at a temperature whereby the major portion of the desired components is recovered in the bottom liquid product from the column.
Inventors:
WILKINSON JOHN D (US)
HUDSON HANK M (US)
HUDSON HANK M (US)
Application Number:
PCT/US2004/021310
Publication Date:
September 14, 2006
Filing Date:
July 01, 2004
Export Citation:
Assignee:
ORTLOFF ENGINEERS LTD (US)
WILKINSON JOHN D (US)
HUDSON HANK M (US)
WILKINSON JOHN D (US)
HUDSON HANK M (US)
International Classes:
F25J3/00; F25J3/02
Foreign References:
| US2952984A | 1960-09-20 | |||
| US5114451A | 1992-05-19 | |||
| US20030158458A1 | 2003-08-21 | |||
| US3524897A | 1970-08-18 | |||
| US5421165A | 1995-06-06 | |||
| US6014869A | 2000-01-18 |
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