Method of dissolving metal oxides with di- or polyphosphonic aci

Chemistry of inorganic compounds – Extracting – leaching – or dissolving

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423 10, 423 20, 423 211, 423 53, 423 49, 4231501, B01F 100, C01G 5600, C01G 3700, C01F 1700

Patent

active

055871429

ABSTRACT:
A method of dissolving metal oxides using a mixture of a di- or polyphosphonic acid and a reductant wherein each is present in a sufficient amount to provide a synergistic effect with respect to the dissolution of metal oxides and optionally containing corrosion inhibitors and pH adjusting agents.

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