Integrated nitrogen removal in the production of liquefied natural gas using refrigerated heat pump
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United States of America Patent
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Apr 17, 2018
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app pub date -
Apr 24, 2014
filing date -
Apr 24, 2014
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Abstract
A method for liquefying a natural gas feed stream and removing nitrogen therefrom, the method comprising passing a natural gas feed stream through a main heat exchanger to produce a first LNG stream, and separating a liquefied or partially liquefied natural gas stream in a distillation column to form nitrogen-rich vapor product, wherein a closed loop refrigeration system provides refrigeration to the main heat exchanger and to a condenser heat exchanger that provides reflux to the distillation column.
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