Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1994-04-19
1995-08-22
Lander, Ferris
Chemistry: fertilizers
Processes and products
Organic material-containing
71 13, 71 15, 71 21, 71 23, 71 24, 71 25, 71 28, 71901, C04F 300
Patent
active
054436133
ABSTRACT:
A high analysis suspension fertilizer containing predetermined amounts of nitrogen and other inorganic plant nutrients is produced from a low plant nutrient-containing organic material, such as animal manure or sewage sludge, by first preparing an aqueous initial suspension of the organic material by admixing with a sufficient amount of water for the organic material to be uniformly dispersed throughout the initial suspension and admixing with the initial suspension a sufficient amount of an acid, such as sulfuric acid, for reacting with the organic material and transforming it into colloidal form, the weight ratio of the acid to the total weight of the organic material in the initial suspension being within the range of about 0.2 to about 2 and the weight ratio of the acid to the total dry weight of the organic material being within the range of about 0.5 to 5. An ammoniacal compound, such as anhydrous or aqueous ammonia, and supplemental compound or compounds for providing the other desired inorganic plant nutrients are added to and admixed with the acidified suspension to produce a finished suspension fertilizer having the desired analysis.
REFERENCES:
patent: 3050383 (1962-08-01), Wilson
patent: 3111404 (1963-11-01), Karcher et al.
patent: 3929446 (1975-12-01), Trocino
patent: 3942970 (1976-03-01), O'Donnell
patent: 3966450 (1976-06-01), O'Neill et al.
patent: 4743287 (1988-05-01), Robinson
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