Method of preparing a slow release fertilizer

Details Method of preparing a slow release fertilizer Method of preparing a slow release fertilizer

1995-11-14

1997-12-09

Lander, Ferris

Chemistry: fertilizers

Processes and products

Inorganic material

71 34, 71 56, 71 63, 71 6411, 71903, 71904, C05B 700, C05C 100, C05C 500, C05G 300

Patent

active

056955421

ABSTRACT:
A method of preparing a slow releasing fertilizer, including the steps of: I) putting twenty parts of inorganic fertilizer and one part of water by weight into a mixer for mixing into a mixture; II) heating the mixture to 105.degree. C.-115.degree. C. and continuously mixing it, therefore causing the mixture to change to liquid state; III) putting zeolite into the liquefied mixture at a volume of about 3 times of that of the inorganic fertilizer by weight, and then continuously heating and mixing until the liquefied fertilizer is absorbed completely by zeolite; IV) cooling down the liquefied mixture with air to below 80.degree. C., causing the mixture to return to the solid state condition; VI) continuously cooling solid state mixture with air to below 50.degree. C., then adding gelatinous substance to the mixture and continuously mixing it; VII) air drying the mixture into the desired finished product.

REFERENCES:
patent: 3441400 (1969-04-01), Otrhalek

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