Concentration of aqueous cyanamide solutions by evaporation

Details Concentration of aqueous cyanamide solutions by evaporation Concentration of aqueous cyanamide solutions by evaporation

C - Chemistry, Metallurgy

01

C

23/35, 202/95

C01C 3/16 (2006.01)

Patent

CA 1080150

CONCENTRATION OF AQUEOUS CYANAMIDE SOLUTIONS BY EVAPORATION ABSTRACT OF THE DISCLOSURE Dilute aqueous solutions of cyanamide are concen- trated by evaporation of water under reduced pressure with a buffering agent in the solution during the evaporation to keep the pH of the solution in the range from 4 to 6. Pre- ferred buffers for this purpose are monosodium phosphate and boric acid present in quantity about 4 percent of the cyan- amide weight in the solution.

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