Process for the production of fertilizer and the fertilizer prod

Details Process for the production of fertilizer and the fertilizer prod Process for the production of fertilizer and the fertilizer prod

1990-01-19

1991-08-27

Ivy, C. Warren

Chemistry: fertilizers

Processes and products

Forms or conditioning

81 81, 81 82, 81 83, 81 84, 81 28, 81 31, 81 6406, 81DIG1, A01N 5900, A01N 4308

Patent

active

050430076

ABSTRACT:
A method for forming a binder-free granular or semi-granular fertilizer is disclosed, which comprises mixing a seed material and primary and secondary nutrient sources in a blender under heat until a slurry is formed, transferring the slurry to a long dryer, and drying the product under vacuum and thereafter gradually cooling the product to produce a granular or semi-granular fertilizer with a core of a seed material and a coating of secondary nutrient salts crystallized thereabout, with nutrients and biologically active agents entrained therein. The fertilizer formed has excellent stability and may be urea-free.

REFERENCES:
patent: 1966947 (1934-07-01), Gyer et al.
patent: 3031290 (1962-04-01), Senoir et al.
patent: 3617239 (1971-11-01), Klanica
patent: 3867124 (1975-02-01), Church
patent: 4026696 (1977-05-01), Young
patent: 4525198 (1985-06-01), Van Hijfte et al.

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