Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1993-11-12
1994-10-04
Lander, Ferris H.
Chemistry: fertilizers
Processes and products
Organic material-containing
71 30, 71902, 71 6403, C05C 900
Patent
active
053522656
ABSTRACT:
An improved homogenous granular fertilizer composition is disclosed; the composition is comprised primarily of urea, N-(n-butyl)thiophosphoric triamide (NBPT), and dicyandiamide (DCD). The composition of this invention can be applied to a field crop in a single surface application and will nevertheless supply sufficient nitrogen to the plants throughout their growth and maturing cycles. The new improved composition increases the nitrogen uptake by plants, enhances crop yields, and minimizes the loss of both ammonium nitrogen and nitrate nitrogen from the soil.
The NBPT is incorporated into the homogenous granular fertilizer composition of this invention by blending a concentrated solution of NBPT in a solvent selected from the group consisting of liquid amides, 2-pyrrolidone, and N-alkyl 2-pyrrolidones directly into molten urea prior to its granulation; the DCD may be added to the urea melt as a solid or in dissolved form along with the NBPT.
REFERENCES:
patent: 3576613 (1971-04-01), Fleming
patent: 3877415 (1975-04-01), Blouin
patent: 3903333 (1975-09-01), Shirley, Jr. et al.
patent: 3991225 (1976-11-01), Blouin
patent: 4081264 (1978-03-01), Ali
patent: 4517003 (1985-05-01), Kolc et al.
patent: 4517004 (1985-05-01), Swerdloff et al.
patent: 4530714 (1985-07-01), Kolc et al.
patent: 4932992 (1990-06-01), Radel
patent: 4954156 (1990-09-01), Gautney et al.
patent: 4994100 (1991-02-01), Sutton et al.
Clay et al, Soil Sci Soc. Am. J, 54, pp. 263-266, 1990 "Ammonia Volatilization from Urea . . . Hydrolysis Inhibitors".
Peacock Lawrence A.
Sutton Allen R.
Thornsberry, Jr. Willis L.
Weston Charles W.
Freeport-McMoRan Resource Partners, Limited Partnership
Lander Ferris H.
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