Title:
凝縮天然ガスからの窒素除去装置
Document Type and Number:
Japanese Patent JP4607990
Kind Code:
B2
Abstract:
Method for the rejection of nitrogen from condensed natural gas which comprises (a) introducing the condensed natural gas into a distillation column at a first location therein, withdrawing a nitrogen-enriched overhead vapor stream from the distillation column, and withdrawing a purified liquefied natural gas stream from the bottom of the column; (b) introducing a cold reflux stream into the distillation column at a second location above the first location, wherein the refrigeration to provide the cold reflux stream is obtained by compressing and work expanding a refrigerant stream comprising nitrogen; and (c) either (1) cooling the purified liquefied natural gas stream or cooling the condensed natural gas stream or (2) cooling both the purified liquefied natural gas stream and the condensed natural gas stream, wherein refrigeration for (1) or (2) is obtained by compressing and work expanding the refrigerant stream comprising nitrogen. The refrigerant stream may comprise all or a portion of the nitrogen-rich vapor stream from the distillation column.
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| WO/1999/039143 | METHOD AND DEVICE FOR EVAPORATING LIQUID OXYGEN |
| JPH06265264 | METHOD OF MANUFACTURING HIGH PURITY NITROGEN |
Inventors:
Adam Adrian Brosto
Mark Julian Roberts
Christopher Jeffrey Spilsbury
Mark Julian Roberts
Christopher Jeffrey Spilsbury
Application Number:
JP2008203428A
Publication Date:
January 05, 2011
Filing Date:
August 06, 2008
Export Citation:
Assignee:
AIR PRODUCTS AND CHEMICALS INCORPORATED
International Classes:
F25J3/08; C10L3/10; F25J3/02
Domestic Patent References:
| JP6503608A | ||||
| JP2002527714A | ||||
| JP2004527716A | ||||
| JP6050657A | ||||
| JP2002206855A | ||||
| JP55025761A | ||||
| JP2001165562A | ||||
| JP7507864A | ||||
| JP49088903A |
Foreign References:
| EP0725256A1 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Nagasaka Tomoyasu
Yoshihiro Kobayashi
Atsushi Ebiya
Takashi Ishida
Tetsuji Koga
Nagasaka Tomoyasu
Yoshihiro Kobayashi
Atsushi Ebiya