Purification of phosphoric acid with oxalic acid

Details Purification of phosphoric acid with oxalic acid Purification of phosphoric acid with oxalic acid

1978-11-13

1979-10-02

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

260561A, 562593, C01B 2522

Patent

active

041698827

ABSTRACT:
Impure wet-process phosphoric acid is treated with urea by known processes to produce relatively pure urea phosphate which is then treated with oxalic acid to give solid urea oxalate and purified phosphoric acid product. The urea oxalate is either treated with ammonia to give urea and ammonium oxalate or it is pyrolyzed to produce urea and oxamide.

REFERENCES:
patent: 3967948 (1976-07-01), McCullough

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