One-step oxidation of wet-process phosphoric acid

Details One-step oxidation of wet-process phosphoric acid One-step oxidation of wet-process phosphoric acid

2005-06-28

2005-06-28

Silverman, Stanley S. (Department: 1754)

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

Reexamination Certificate

active

06911191

ABSTRACT:
A one-step method for production of green-colored, stabilized wet-process phosphoric acid in which black-colored, wet-process phosphoric acid containing incidental metallic impurities and a carbonaceous content of less than 1000 ppm is oxidized to produce a green-colored liquid having a carbonaceous content less than 500 ppm. A typical green-colored liquid product produced by this one-step process has an emf of greater than 800 mv.

REFERENCES:
patent: 4420321 (1983-12-01), Wilson
patent: 4808391 (1989-02-01), Leavitt et al.

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