Process for manufacture of ammonia

Details Process for manufacture of ammonia Process for manufacture of ammonia

1985-01-04

1986-06-10

Metz, Andrew H.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Ammonia or ammonium hydroxide

423360, 423361, 252373, 252377, C01C 104, C01B 202, C01B 230

Patent

active

045942331

ABSTRACT:
An improved process for making synthetic ammonia wherein a make-up synthesis gas is added to recycled unreacted gas from a catalytic conversion loop including the steps of introducing a volatile anti-icing compound into the hot make-up gas to vaporize the compound, cooling the gas and vaporized anti-icing compound to condense part of the anti-icing compound, separating the condensed anti-icing compound and dissolved impurities from the make-up gas, further cooling the make-up gas to a temperature at which the remaining anti-icing compound condenses essentially completely, separating the condensed remaining anti-icing compound from the make-up gas, mixing the resulting make-up gas at the low temperature with liquid ammonia to saturate the make-up gas with ammonia, separating unvaporized liquid ammonia from the saturated make-up gas, mixing the saturated make-up gas with recycle and passing the mixed gases directly to the catalytic ammonia synthesis converter.

REFERENCES:
patent: 1745730 (1930-02-01), Uhde
patent: 3343916 (1967-09-01), Cahn et al.
patent: 3349569 (1967-10-01), Nebgen
patent: 3684442 (1972-08-01), Konoki et al.
patent: 4255406 (1981-03-01), Isalski et al.
patent: 4469665 (1984-09-01), Pinto
"New Separation Process Gives Cheaper Ammonia", Hydrocarbon Processing, Jul. 1972.

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