Patent ID: 8608821

Claim:
A method for the combined production of (i) a fertilizer selected from the group consisting of ammonium nitrate, ammonium phosphate and combinations thereof and (ii) a concentrated stream of carbon dioxide (CO 2 ); said method comprising: (a) contacting a CO 2 containing gas with a first base selected from the group consisting of calcium oxide, calcium hydroxide, a stream that contains the same, and combinations thereof and a second base selected from the group of NaOH, KOH, a primary amine soluble in aqueous solution, a secondary amine soluble in aqueous solution, a tertiary amine soluble in aqueous solution, a stream that contains the same, and combinations thereof, whereby a carbonate product is formed; (b) reacting the product resulting from step (a) with ammonia to form ammonium carbonate product and thereby regenerating at least a portion of said first base; (c) separating at least a portion of ammonium carbonate product from said regenerated base; (d) reacting the said ammonium carbonate product with a reagent selected from the group consisting of nitric acid, phosphoric acid, a salt thereof, and a mixture thereof to form CO 2 and said fertilizer; (e) separating at least a portion of said CO 2 formed in step (d) from said fertilizer in a condensed and relatively concentrated stream.