Process for the preparation of fertilizers by the partial solubi

Details Process for the preparation of fertilizers by the partial solubi Process for the preparation of fertilizers by the partial solubi

1984-08-10

1986-02-04

Lander, Ferris H.

Chemistry: fertilizers

Processes and products

Inorganic material

71 40, C05B 700

Patent

active

045683743

ABSTRACT:
The object of the invention comprises a process for the preparation of fertilizers by solubilizing phosphate rocks containing impurities, which make processing thereof difficult.
The process is a simple and direct one. The product thus prepared is easily handled, can be directly used as a powdered fertilizer and dispenses with any post-treatment steps, such as purification, filtration, etc.
The rock is solubilized with acid ammonium sulfate or a mixture thereof with sulfuric acid. This acid ammonium sulfate can be formed "in situ", by the reaction of ammonium sulfate and sulfuric acid.
Reaction may take place in a mixing reactor, on a belt conveyor or in a granulator.

REFERENCES:
patent: 1871195 (1932-08-01), Ober et al.
patent: 2036494 (1936-04-01), Plummer
patent: 2038788 (1936-04-01), Harvey et al.
patent: 3172751 (1965-03-01), Datin
patent: 4321077 (1982-03-01), Schroeder et al.

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