Classifying – separating – and assorting solids – Precedent preparation of items or materials to facilitate... – Selective differentiation
Patent
1979-03-19
1981-03-17
Vertiz, O. R.
Classifying, separating, and assorting solids
Precedent preparation of items or materials to facilitate...
Selective differentiation
423321R, 23293R, B03B 100, B03D 306, C01B 2516
Patent
active
042565707
ABSTRACT:
Phosphoric acid is purified by a process which comprises treating the crude acid solution with a body feed agent and a flocculating agent to cause a portion of the impurities to settle out, and contacting the partially clarified acid with activated carbon for further impurity removal. In the preferred process, hot wet process phosphoric acid from the plant filter is first cooled to a temperature of from about 100.degree. F. to about 130.degree. F. and then treated in the above-described manner.
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Allen Hanceford L.
Berry William W.
Heller Gregory A.
International Minerals & chemical Corporation
Vertiz O. R.
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