Recovery of ammonia from underground storage
AssigneeCominco Ltd.
InventorJohn T. Higgins
Life of this patent
Estimating the term…
Abstract
A process for recovering gaseous ammonia from liquefied ammonia stored in an underground cavern includes heating gaseous ammonia to a temperature below that at which decomposition occurs and feeding it into the liquefied ammonia in the cavern. The release of the heated gaseous ammonia in the liquefied ammonia causes conversion of some of the liquid into gaseous form, and gaseous ammonia so formed is withdrawn from the cavern.
Claims6
A process for recovering gaseous ammonia from liquefied ammonia stored in an underground cavern, comprising heating gaseous ammonia to a temperature below that at which decomposition occurs, feeding said heated gaseous ammonia into the liquefied ammonia in the cavern and releasing the heated gaseous ammonia in said liquefied ammonia to cause conversion of some of the liquid into gaseous form, and withdrawing gaseous ammonia from the cavern.
A process for recovering gaseous ammonia from liquefied ammonia stored in an underground salt cavern, comprising heating gaseous ammonia to a temperature below that at which decomposition occurs, feeding said heated gaseous ammonia into the liquefied ammonia in the cavern and releasing the heated gaseous ammonia in said liquefied ammonia to cause conversion of some of the liquefied ammonia into gaseous form, withdrawing gaseous ammonia through a mist eliminator to separate entrained liquid droplets containing dissolved salt therefrom, supplying a portion of said withdrawn ammonia gas to the heating step, and utilizing another portion of the withdrawn ammonia gas elsewhere.
Dependencies are inferred from the claim text.