Invention Grant
- Patent Title: Liquefied natural gas processing
- Patent Title (中): 液化天然气加工
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Application No.: US10675785Application Date: 2003-09-30
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Publication No.: US07155931B2Publication Date: 2007-01-02
- Inventor: John D. Wilkinson , Hank M. Hudson
- Applicant: John D. Wilkinson , Hank M. Hudson
- Applicant Address: US TX Midland
- Assignee: Ortloff Engineers, Ltd.
- Current Assignee: Ortloff Engineers, Ltd.
- Current Assignee Address: US TX Midland
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Main IPC: F25J3/00
- IPC: F25J3/00

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.
Public/Granted literature
- US20050066686A1 Liquefied natural gas processing Public/Granted day:2005-03-31
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