Chemistry of inorganic compounds – Nitrogen or compound thereof – Ammonia or ammonium hydroxide
Patent
1990-04-02
1992-05-19
Langel, Wayne
Chemistry of inorganic compounds
Nitrogen or compound thereof
Ammonia or ammonium hydroxide
423359, C01C 100, C01C 104
Patent
active
051146940
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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Chemical Abstracts, vol. 102, No. 12, Mar. 1985 Columbus, Ohio U.S.A. M. Mrowiec et al.: "Multistage isothermic absorber for ammonia absorption", p. 110; ref. No. 97712 U.
C. F. Braun & Co.
Langel Wayne
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