Treatment of ammonia synthesis purge gas

Details Treatment of ammonia synthesis purge gas Treatment of ammonia synthesis purge gas

1979-10-11

1982-01-26

Vertiz, O. R.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Ammonia or ammonium hydroxide

55 23, 55 25, 55 57, 55 66, 55267, 422148, C01C 104

Patent

active

043128513

ABSTRACT:
A method of synthesizing ammonia by reacting a synthesis gas comprising nitrogen and hydrogen at superatmospheric pressure in a synthesis reaction zone with recycling of unreacting gas to the reacting zone is disclosed in which a purge gas stream is withdrawn at superatmospheric pressure and subjected to the steps of: (a) work expansion, (b) separation of methane and argon to form a gaseous product stream comprising nitrogen and hydrogen, (c) recompression of at least a portion of the gaseous product stream from step (b) using work generated in step (a), and (d) recycling of at least a portion of the recompressed product from step (c) to the reaction zone.
Apparatus for effecting said process is also claimed.

REFERENCES:
patent: 1849357 (1932-03-01), Pyzel
patent: 3615200 (1971-10-01), Konoki
patent: 4058589 (1977-11-01), Haslam

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