Reproduction of the etching solution which contains trivalent manganese in an acid medium

Title:

Reproduction of the etching solution which contains trivalent manganese in an acid medium

Document Type and Number:

Japanese Patent JP6239734

Kind Code:

B2

Abstract:

A method of regenerating an etch solution comprising a metastable complex of manganese(III) ions in a strong acid is described in which at least a portion of the manganese(III) ions in the metastable complex have been destabilized, causing them to disproportionate into manganese dioxide and manganese(II) ions. The method includes the steps of i) adding an effective amount of a reducing agent to the solution; ii) allowing the reducing agent to react with the solution to cause manganese dioxide to dissolve; and (iii) applying an electrical current to regenerate manganese(III) ions in the solution.

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Inventors:

Roderick Dee Hardman

Application Number:

JP2016510682A

Publication Date:

November 29, 2017

Filing Date:

April 01, 2014

Export Citation:

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