Recovery of oxalate from solutions containing complexes of iron

Details Recovery of oxalate from solutions containing complexes of iron Recovery of oxalate from solutions containing complexes of iron

1988-10-17

1993-03-23

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562597, C07C 5142, C07C 5506

Patent

active

051965801

ABSTRACT:
A method is disclosed for recovering oxalate from oxalate containing solutions containing complexes of iron and chromium. The method involves adjusting the pH of the solution to from about 1 to 2, adding calcium chloride in an amount equal to at least about 3 moles per mole of iron, and digesting the resulting calcium chloride treated solution at at least about 50.degree. C. for a sufficient time to form a solid consisting esssentially of calcium oxalate, followed by separating the solid from the resulting mother liquor.

REFERENCES:
patent: 3840469 (1974-10-01), Hobbs, Jr. et al.
patent: 3998878 (1976-12-01), Hearon et al.
patent: 4303624 (1981-12-01), Dotson et al.

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