Patent ID: 8580219
Filing Date: 2013-11-12
Classification: C01C,C10G,C10K,Y02E,Y02P

Abstract:
1. A method for recovering ammonium carbonate and ammonium bicarbonate from a liquid solution comprising at least one of ammonia or ammonium, the process comprising the steps of: a. providing the liquid solution comprising ammonium at a pH and temperature sufficient to convert at least a portion of ammonium in the solution to free ammonia and provide a converted solution; b. stripping ammonia from the converted solution in an ammonia stripping vessel to produce a gas phase ammonia stream; c. contacting the ammonia stream with a scrubbing liquid comprising dissolved CO d. withdrawing an ammonium liquid comprising ammonium carbonate and ammonium bicarbonate from the scrubbing vessel; e. recovering a first portion of the ammonium liquid as an ammonium product stream; and f. contacting a second portion of the ammonium liquid with a CO