Animal feed and its process of manufacture

Details Animal feed and its process of manufacture Animal feed and its process of manufacture

A - Human Necessities

23

K

99/31

A23K 1/175 (2006.01)

Patent

CA 1129708

ABSTRACT Metal ion impurities are removed from phosphoric acid by adding to the acid a precipitant comprising ions of clacium and fluorine to cause precipitation of, for example, a magnesium-containing precipitate. A pre- ferred precipitant is one containing calcium fluoride, such as the sludge obtained by treating pond water from a phosphoric acid plant with a calcium- containing compound. Preferably, the soluble sulphate content of the phosphoric acid is maintained at at least about 2% by weight. An animal feed can be prepared from the precipitate by combining the precipitate with phosphate rock, water, and a sodium-containing compound, and then calcining the combination.

333051

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