Ammonia synthesis
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United States of America Patent
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Oct 25, 1988
Grant Date -
N/A
app pub date -
Feb 20, 1987
filing date -
Feb 26, 1986
priority date (Note) -
Expired
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Abstract
An ammonia production process in which excess nitrogen and traces of carbon oxides are removed from raw ammonia synthesis gas firstly by application of partial condensation and secondly by application of washing action provided by carbon-oxides-free liquified gas, rich in nitrogen, which is derived from a cryogenic process used preferentially for separation of hydrogen from the ammonia synthesis loop purge gas as produced in processes which use excess of nitrogen above stoichiometric requirements in the circulating gas in the synthesis loop.
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