Ammonia recovery from purge gas

Details Ammonia recovery from purge gas Ammonia recovery from purge gas

C - Chemistry, Metallurgy

01

C

C01C 1/12 (2006.01) B01D 53/14 (2006.01) C01C 1/04 (2006.01)

Patent

CA 2045282

Patent 185/299 ABSTRACT A continuous process for recovering ammonia from a purge gas of an ammonia synthesis system wherein the purge gas is scrubbed by an aqueous liquid solution in counter-current flow with continuous cooling which is controlled to maintain temperature levels safely above the freezing point and to produce an aqueous solution of high ammonia concentration which is mixed with an anhydrous ammonia product of the ammonia synthesis system to form a blended ammonia product with a minimum water concentration high enough to provide corrosion protection to carbon steel storage equipment and a maximum water concentration low enough to meet a maximum design specification for the concentration of water in the blended ammonia product.

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