METHOD FOR LIQUEFYING A HYDROCARBON-RICH FRACTION
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United States of America Patent
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Feb 11, 2016
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Mar 5, 2015
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A process for liquefying a hydrocarbon-rich fraction, in particular natural gas, where the hydrocarbon-rich fraction is precooled and subjected to water separation and a subsequent drying process before liquefaction and the hydrocarbon-rich fraction is liquefied against at least one mixed refrigerant circuit, where the refrigerant circulating in the mixed refrigerant circuit is compressed in at least two stages, subsequently at least partially condensed and the liquid fraction formed here is at least partly mixed into the refrigerant which has been compressed to an intermediate pressure is described. A substream of the liquid fraction serves for precooling the hydrocarbon-rich fraction to be liquefied before it is fed to the water separation, where heat exchange between the liquid fraction and the hydrocarbon-rich fraction to be liquefied is effected by means of at least one heat exchanger system.
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