Water → Urea phosphoric acid
Reaction equation
O.[NH2:2][C:3]([NH2:5])=[O:4].[P:6](=[O:10])([OH:9])([OH:8])[OH:7]>>[P:6](=[O:7])([OH:10])([OH:9])[OH:8].[NH2:2][C:3]([NH2:5])=[O:4]Participants
Procedure
A method of manufacturing water soluble mixed NPK fertilizer composition in solid form comprising the steps of (a) dissolving urea in phosphoric acid to form a urea phosphoric acid adduct solution, (b) adding one or more potassium salts to said adduct while agitating to form a mixture in solid or slurry form and (c) cooling the mixture thus formed, so as to crystallize the solid soluble fertilizer granules when the mixture is a slurry, the constituents of the mixture so chosen that the final product contains between 5 and 42% nitrogen, between 2 and 15% phosphorus and between 1 and 38% potassium, these values being elemental mass as a percentage relating to the total mass of the composition, the resulting composition, in 10% aqueous solution, having a pH of between 1.2 and 2.0.
Sources & evidence
- ORD record
- ord-ceea9e2d69cd4d049e13de5f2865f716
- Source dataset
- uspto-grants-1979_11
- Patent number
- US04175943
Reaction notes
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