Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1988-12-28
1990-07-24
Lander, Ferris H.
Chemistry: fertilizers
Processes and products
Organic material-containing
71 30, 71 6405, 71 6413, C05C 300, C05C 900
Patent
active
049433083
ABSTRACT:
The invention concerns a method of producing fertilizer granules containing urea and ammonium sulphate by granulating a mixture containing urea, ammonium sulphate and water, which is characterized in that the ammonium sulphate is completely dissolved in an aqueous urea solution with a urea concentration of 70-85% by weight, the resulting solution is thickened to a dry content of 92-97% by weight, with a granulation additive for the urea being added in any stage of the treatment, following which the thickened solution is granulated in a fluidized bed of urea and ammonium sulphate containing nuclei.
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Ind. Eng. Chem., Process Des. Dev. 14 (1975), 269-276.
Cardon Walter E.
Vanmarcke Luc A.
Hydro Agri Sluiskil B.V.
Lander Ferris H.
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