1
Paul R Hahn: Natural gas liquefaction with improved nitrogen removal. ConocoPhillips Company, Gary L Haag, October 14, 2003: US06631626 (30 worldwide citation)

Natural gas liquefaction system employing a zeolite adsorbent for removing nitrogen from pretreated natural gas.


2
Hahn Paul R: Natural gas liquefaction with improved nitrogen removal. Conocophillips Company, Hahn Paul R, RICHARDS John, February 19, 2004: WO/2004/015346 (1 worldwide citation)

Natural gas liquefaction system employing a zeolite adsorbent (404) for removing nitrogen (414) from pretreated natural gas (402).