Method for separating and recovering Ru from solution containing pt family

A technology for separation, recovery and solution, applied in the direction of improving process efficiency, can solve problems such as cracking, low volatility, and fog scattering, and achieve the effect of preventing decomposition, stable operation, and realizing operation.
CN1786224AInactive Publication Date: 2006-06-14JX NIPPON MINING & METALS CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
JX NIPPON MINING & METALS CO LTD
Publication Date
2006-06-14
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

PROBLEM TO BE SOLVED: To provide a method for efficiently separating Ru from a solution containing a platinum group element by oxidation distillation. SOLUTION: The method for separating and collecting Ru from the solution containing the platinum group element includes adjusting the pH of the solution containing one or more platinum group elements among Ru, Pt, Pd, Rh and Ir to 0.5 to 2.5, converting Ru to ruthenium tetroxide through oxidation with the use of sodium bromate as an oxidizing agent, and distilling the solution, wherein sodium bromate is excessively added in an amount of 1 equivalent weight required for oxidizing Ru into ruthenium tetroxide and further an amount required for adjusting the concentration of sodium bromate to 80 g / L or higher. COPYRIGHT: (C)2006,JPO&NCIPI
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Description

technical field

[0001] The present invention relates to a method for separating Ru from a platinum group-containing solution, such as a post-leaching solution of copper electrolytic slime. Background technique

[0002] As a method for separating Ru, it is known to utilize ruthenium tetroxide (RuO 4 ) Volatile oxidative distillation method. For example, in the document Japan Atomic Mechanics Journal 28 volumes from page 493 to page 500 (non-patent document 1), it is described that adding oxidant to the residue containing platinum group and dissolving it with alkali, feeding chlorine gas, recovering volatilized The method of ruthenium tetroxide. However, when feeding chlorine gas, the chlorine gas absorbed by the aqueous solution is decomposed into hypochlorous acid and hydrochloric acid to make the solution acidic, so that the oxidative distillation is no longer carried out. Therefore, in order to improve the recovery rate, it is necessary to add alkali to repeat the distil...

Claims

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