Chemistry of inorganic compounds – Nitrogen or compound thereof – Ammonia or ammonium hydroxide
Patent
1985-05-09
1987-07-21
Doll, John
Chemistry of inorganic compounds
Nitrogen or compound thereof
Ammonia or ammonium hydroxide
C01C 104
Patent
active
046817450
ABSTRACT:
Production of ammonia by the sequence of steam hydrocarbon primary reforming, secondary reforming with air, carbon monoxide shift conversion, carbon oxides removal and catalytic ammonia synthesis is improved by using oxygen-enriched air at secondary reforming and/or by operating the reforming steps so that 5-15% by carbon atoms of the starting hydrocarbon is not reformed but is purged from the synthesis. The oxygen enriched air can be the by-product of a simple air separation plant producing nitrogen, and the nitrogen can be used to aid start-up or shut-down of the process or to keep the process plant in a hot stand-by condition.
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Doll John
Imperial Chemical Industries plc
Langel Wayne A.
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