Plant and process for ammonia production with cryogenic purification, and related method of revamping

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United States of America

PATENT NO 10514203
SERIAL NO

15527989

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Abstract

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Process for the synthesis of ammonia from a make-up gas containing hydrogen and nitrogen, said process comprising: generation of a synthesis gas (8) containing hydrogen and nitrogen in a molar ratio lower than 3, inside a front-end section (2); a first cryogenic purification, designed to remove nitrogen and raise said molar ratio; conversion of the synthesis gas into ammonia (13) inside a high-pressure synthesis loop (6), with extraction from said loop of a purge stream (14) containing hydrogen and inert gases; wherein at least a portion of said purge stream (14) undergoes a further purification in order to recover at least part of the hydrogen contained therein, obtaining at least one stream (15, 15a, 16, 18) containing recovered hydrogen which is recycled to the process.

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Patent Owner(s)

  • AMMONIA CASALE SA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Filippi, Ermanno Castagnola, CH 123 464
Ostuni, Raffaele Lugano, CH 55 87

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