Chemistry: fertilizers – Processes and products – Inorganic material
Patent
1986-03-20
1988-01-26
Lander, Ferris H.
Chemistry: fertilizers
Processes and products
Inorganic material
71 43, 423313, 423321R, C05B 700
Patent
active
047215194
ABSTRACT:
A stable ammonium polyphosphate liquid fertilizer is prepared from concentrated wet-process phosphoric acid of 54-62% P.sub.2 O.sub.5, which prior to concentration is treated with a cation exchange resin to remove magnesium and calcium without appreciable reduction of iron and aluminum. The liquid fertilizer will remain substantially sludge-free when stored at 25.degree. C. for six months without the addition of any sequestering or suspending agent.
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Lawton William S.
Thomas William P.
American Petro Mart, Inc.
Lander Ferris H.
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