Process for making ammonia from heterogeneous feedstock

Details Process for making ammonia from heterogeneous feedstock Process for making ammonia from heterogeneous feedstock

1998-11-25

2000-07-11

Langel, Wayne

Chemistry of inorganic compounds

Nitrogen or compound thereof

Ammonia or ammonium hydroxide

422148, 422198, 422200, 423650, 423655, C01C 104

Patent

active

060868406

ABSTRACT:
Ammonia is made from a carbon-containing heterogeneous feedstock by partially oxidizing the feedstock at low pressure to generate a synthesis gas containing CO; isothermally shift reacting the synthesis gas with steam to form H.sub.2 ; cryogenically removing portions of the CO.sub.2 and Ar from the shifted gas; purifying the H.sub.2 in a pressure swing adsorber; mixing the purified H.sub.2 with high purity N.sub.2 ; and converting the H.sub.2 and N.sub.2 into ammonia. The tail stream from the pressure swing adsorber can be recycled with the synthesis gas for control purposes and/ or used as boiler fuel. The reduced volume of purge gas purged from the ammonia synthesis loop allows ammonia contained in the purge gas stream to be recovered by cryogenic condensing.

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