Methods for producing stable, acidic urea solutions

Details Methods for producing stable, acidic urea solutions Methods for producing stable, acidic urea solutions

C - Chemistry, Metallurgy

07

C

C07C 273/16 (2006.01)

Patent

CA 2067262

Abstract of the Disclosure Acidic urea solutions having low equilibrium vapor pressures are produced by stripping an aqueous urea solution having a pH of about 5.5 or less and a total carbonate content which, if present as carbon dioxide, would produce an equilibrium vapor pressure over said solution of more than 0.5 psig. at 20° C., under conditions sufficient to reduce the total carbonate content to a level which, if present as carbon dioxide, would produce an equilibrium vapor pressure over the solution of 0.5 psig. or less at 20° C. Methods for storing such compositions axe also provided. 0187342

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