Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1975-06-05
1976-07-13
Vertiz, Oscar R.
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
423321S, C01B 1516, C01B 2526
Patent
active
039694836
ABSTRACT:
Particulate carbonaceous matter in ammonium polyphosphate liquid made from impure wet-process phosphoric acid is removed by intimately mixing the liquid with a combination of selected organic flocculating agents and then transferring the mixture to a separation vessel where the particulate carbonaceous matter floats rapidly to the surface. Clarified liquid that contains essentially no particulate carbonaceous matter is withdrawn from the bottom of the separation vessel. The particulate carbonaceous matter and a minor portion of the input ammonium polyphosphate liquid are withdrawn from the top of the separation vessel and processed into fluid or solid fertilizers.
REFERENCES:
patent: 3367749 (1968-02-01), Koerner et al.
patent: 3458282 (1969-07-01), Koerner et al.
patent: 3630711 (1971-12-01), Burkert et al.
Johnson Dale H.
Mann, Jr. Horace C.
Stinson John M.
Akzona Incorporated
Heller Gregory A.
Petrusek Robert A.
Tennessee Valley Authority
Vertiz Oscar R.
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