发明授权
- 专利标题： Natural gas liquefaction method with high-pressure fractionation
- 专利标题（中）： 天然气液化方法采用高压分馏
-
申请号： US12739243申请日： 2008-10-17
-
公开(公告)号： US09222724B2公开(公告)日： 2015-12-29
- 发明人: Béatrice Fischer , Gilles Ferschneider , Anne Claire Lucquin
- 申请人： Béatrice Fischer , Gilles Ferschneider , Anne Claire Lucquin
- 申请人地址： FR Rueil-Malmason
- 专利权人： IFP Energies Nouvelles
- 当前专利权人： IFP Energies Nouvelles
- 当前专利权人地址： FR Rueil-Malmason
- 代理商 John Sopp; Anthony Zelano; Brion Heaney
- 优先权： FR0707829 20071026
- 国际申请： PCT/FR2008/001462 WO 20081017
- 国际公布： WO2009/087308 WO 20090716
- 主分类号： F25J1/00
- IPC分类号： F25J1/00 ; F25J3/00 ; F25J3/02 ; F25J1/02
摘要：
The method provides liquefaction of a natural gas by carrying out the following stages: cooling the natural gas; feeding the cooled natural gas into a fractionating column so as to separate a methane-rich gas phase and a liquid phase rich in compounds heavier than ethane; and liquefying the methane-rich stream so as to obtain the liquid natural gas. According to the invention, the operating conditions in the fractionating column are so selected that said liquid phase comprises a molar proportion of methane ranging between 10% and 150% of the molar proportion of ethane.