Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1983-03-10
1984-10-02
Lander, Ferris H.
Chemistry: fertilizers
Processes and products
Organic material-containing
71 6401, 71 6411, 71 6413, C05C 902
Patent
active
044745958
ABSTRACT:
A process for making controlled release fertilizer product containing an increased amount of sustained-release nitrogen includes the step of mixing a partly water soluble thermoplastic binder, and urea-formaldehyde condensate and a pH modifier. The amount of pH modifier should be sufficient to bring the pH of the shaped fertilizer product to the range from about 6 to about 12. The mixture is subjected to such conditions including temperature and pressure so as to produce a shaped fertilizer product. The resulting shaped fertilizer product includes approximately the same amount of sustained-release nitrogen as the urea-formaldehyde condensate in the mixture.
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Hayes, "Fertilizers for Controlled Release of Nitrogen".
Grotta Henry M.
Lawhon, Jr. William T.
International Spike, Inc.
Lander Ferris H.
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