Recovery of phosphorus values from waste phosphoric acid liquors

Details Recovery of phosphorus values from waste phosphoric acid liquors Recovery of phosphorus values from waste phosphoric acid liquors

1989-01-25

1991-01-29

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423316, 423321S, C01B 2516

Patent

active

049884891

ABSTRACT:
The phosphorus values from waste phosphoric acid containing organic contaminents such as wastes obtained in the manufacture of quinacridone pigments can be recovered in purified form by hydrolyzing phosphate esters, removing any formed alcohol, dissociating any amine phosphates and separating any free amine. The phosphorus values can be recovered in a purified form as phosphate salts.

REFERENCES:
patent: 3410656 (1968-11-01), Bunin et al.
patent: 3739046 (1973-06-01), Stanford et al.
patent: 3749047 (1973-06-01), Stanford et al.
patent: 4483838 (1984-11-01), Sculthorpe

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