Treatment of phosphoric acid

Details Treatment of phosphoric acid Treatment of phosphoric acid

1978-09-27

1981-02-03

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423315, 71 34, C01B 2516, C01B 1516, C01B 2526

Patent

active

042488435

ABSTRACT:
A method for the treatment of phosphoric acid containing one or more impurities comprising the ions of at least one of the metals from the group magnesium, iron and aluminium, including the step of heating the acid under such conditions of temperature, pressure, time and concentration as to cause at least some of these impurities, (and in the case where magnesium is the major constituent among such impurities, more than 60% (mass/mass) of such magnesium) to precipitate as a pyrophosphate of the relevant metal ion.

REFERENCES:
patent: Re29149 (1977-03-01), Young
patent: 2415797 (1942-10-01), Low
patent: 3206282 (1965-09-01), Crawford et al.
patent: 3403974 (1968-10-01), Mustian, Jr.
patent: 3453074 (1969-07-01), Mustian, Jr.
Phosphoric Acid, vol. I, Slack et al., 1968, p. 651.

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