PROCESS FOR THE PRODUCTION OF AMMONIA SYNTHESIS GAS WITH IMPROVED CRYOGENIC PURIFICATION
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United States of America Patent
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Issued Date -
Mar 4, 2010
app pub date -
Jul 29, 2009
filing date -
Aug 28, 2008
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Abandoned
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Abstract
A process and related equipment for producing ammonia synthesis gas are disclosed, wherein a raw syngas (13) is purified in a cryogenic section (CS) and a nitrogen-rich liquid stream (30) is separated from the raw syngas flow during purification and HN ratio adjustment, and wherein the pressure of said liquid stream (30) is reduced in a turbine (80) to enhance net refrigerative effect for the cryogenic section. Embodiments wherein chilling is also provided by a low-pressure or high-pressure syngas expander are also disclosed.
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