Fertilizer production

Details Fertilizer production Fertilizer production

1972-12-27

1976-11-23

Hart, Charles N.

Chemistry: fertilizers

Processes and products

Inorganic material

71 39, 423319, C05B 1106

Patent

active

039934667

ABSTRACT:
Multinutrient synthetic fertilizers, containing potassium and phosphorus and, if desired, other elements of fertilizing value, are produced from phosphate rock or ore and potassium chloride in a method, in which calcium and chlorine are simultaneously removed as a solution of calcium chloride, said method comprising treating a solution of the phosphate rock or ore in a mineral acid with a cation exchanger charged with potassium ions in order to exchange at least part of the calcium ions of the phosphate rock solution with potassium ions, after which the ion exchanger and the solution are separated, the solution being worked up to the final fertilizer, and the ion exchanger being regenerated for renewed use.

REFERENCES:
patent: 2619404 (1952-11-01), Skogseid
patent: 2793953 (1957-05-01), Loo
patent: 3121004 (1964-02-01), Verheul
patent: 3347656 (1967-10-01), Potts et al.
patent: 3382035 (1968-05-01), Slater
patent: 3433617 (1969-03-01), Legal et al.
patent: 3652254 (1972-03-01), Knudsen

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