Fluid urea-containing fertilizer

Details Fluid urea-containing fertilizer Fluid urea-containing fertilizer

C - Chemistry, Metallurgy

05

G

C05G 5/00 (2006.01) C05C 1/00 (2006.01) C05C 13/00 (2006.01) C05G 3/00 (2006.01)

Patent

CA 2117866

An improved fluid urea-containing fertilizer composition is disclosed; the composition is essentially comprised of an aqueous solution of urea, ammonium nitrate, N-(n-butyl)thiophosphoric triamide (NBPT), dicyandiamide (DCD), and may optionally also contain a clay as a suspending agent. The fluid fertilizer composition can be applied to a field crop in a single application and will nevertheless supply sufficient nitrogen to the plants throughout their growth and maturing cycles. As a result, the improved composition increases the nitrogen uptake efficiency of plants, enhances crop yields, and minimizes the loss of nitrogen from the soil. The NBPT is incorporated into the fluid fertilizer composition by blending a concentrated solution of N-(n-butyl)thiophosphoric triamide in a solvent selected from the group consisting of liquid amides such as an N-alkyl pyrrolidone directly with an aqueous solution of urea and ammonium nitrate, optionally also containing a suspending agent and commonly referred to in the fertilizer trade as UAN; the DCD may be added to the UAN fluid as a solid, a suspension, or in dissolved form along with the NBPT.

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