Method of removing scale caused by raffinate in a phosphoric aci

Details Method of removing scale caused by raffinate in a phosphoric aci Method of removing scale caused by raffinate in a phosphoric aci

1977-04-11

1978-08-01

Bashore, S. Leon

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 22R, 134 22C, 423321S, B08B 308

Patent

active

041040791

ABSTRACT:
A scale deposited from a raffinate in a purification of a wet process phosphoric acid with an organic solvent or a mixture of an organic solvent and a strong acid by an extraction method is contacted with a solution containing a strong base to react with iron and aluminum components in the scale.

REFERENCES:
patent: 3360399 (1967-12-01), Knox et al.
patent: 3684439 (1972-08-01), Rose et al.
patent: 3937783 (1976-02-01), Wamser et al.
patent: 3965238 (1976-06-01), Tabata et al.

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