Purification of phosphoric acid

Details Purification of phosphoric acid Purification of phosphoric acid

C - Chemistry, Metallurgy

01

B

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C01B 25/234 (2006.01) B03D 3/06 (2006.01) C01B 25/235 (2006.01)

Patent

CA 1123574

ABSTRACT Phosphoric acid is purified by a process which com- prises 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 phos- phoric acid from the plant filter is first cooled to a temperature of from about 100°F to about 130°F and then treated in the above-described manner.

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