Title:
液化天然ガスの処理
Document Type and Number:
Japanese Patent JP4498360
Kind Code:
B2
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.
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Inventors:
Wilkinson, John Dee
Hudson, hank em
Hudson, hank em
Application Number:
JP2006533825A
Publication Date:
July 07, 2010
Filing Date:
July 01, 2004
Export Citation:
Assignee:
Autorov Engineers Limited
International Classes:
C10L3/06; F25J3/02
Domestic Patent References:
| JP5240576A | ||||
| JP58022872A | ||||
| JP3255876A |
Attorney, Agent or Firm:
Kazuo Shamoto
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Koji Hirayama
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Koji Hirayama