Chemistry: fertilizers – Processes and products – Forms or conditioning
Patent
1987-05-07
1988-10-11
Schwartz, Richard A.
Chemistry: fertilizers
Processes and products
Forms or conditioning
544220, A01N 4364, C07D25108
Patent
active
047768797
ABSTRACT:
In a preferred embodiment, a high-yield method producing novel water insoluble triazone compositions with a typical analysis, prior to separation of the insoluble triazone crystals, has components in amounts as follow, percentages being based on the total weight of the reaction product; unreacted urea at about 10%, total percentage of nitrogen from urea at about 4.7, with maximum total nitrogen at about 30 percent, with the yield of triazone at about 75 percent, produced by a novel method in which urea or substituted urea and pH adjusted to and maintained at about pH 9.0 by addition preferably of potassium hydroxide 45% aqueous solution, while mixing thoroughly and heating for about one hour at a temperature of about 85 degrees Centigrade, however keeping below the boiling point of the aldehyde, utilizing water or other solvent such as alcohol or other equivalent to maintain fluid conditions. The amine is thereafter slowly added while the maintaining temperature below about 65 degrees during the amine addition, and while continuing to maintain the pH at about 9.0. Thereafter, the mixture is heated to and maintained at about 85 degrees Centigrade for about one hour, and thereafter cooled to about 30 degrees Centigrade, followed by filtering-off triazone crystals, washing the precipitate crystals with reagent alcohol or water, and drying the crystals. In the above procedure, the molar ratio of various ingredients are typically as follow: urea/aldehyde/ammonia (or amine) at about 0.5/1/0.5, except that for ethylene diamine or other diamine, the ratio is at about 0.5/1.0/0.25. A number of water-insoluble triazones produced by this method have been found to be beneficial fertilizers. Novel water-insoluble triazone compositions include typically, 5-B-ethanol triazone, 5-methyl triazone, 5, 5' ethylene ditriazone, thiotriazone, 5-methyl thiotriazone, 5-B-ethanol thiotriazone, 4,6-dimethyl-5-B-hydroxyethyl thiotriazone. These novel triazones are applied by any conventional or desired method to land or crops as fertilizer alone or in combination with other fertilizers.
REFERENCES:
patent: 4554005 (1985-11-01), Hawkins
patent: 4599102 (1986-07-01), Hawkins
Clapp, Jr. John G.
Hawkins Edwin F.
Hough William T.
Schwartz Richard A.
Triazone Corporation
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