Method for removing palladium from silver electrolyte by using multifunctional silica gel adsorbent

A silica gel adsorption and multi-functional technology, applied in the direction of electrolysis process, electrolysis components, process efficiency improvement, etc., can solve the problem of increasing Ag separation process, etc., and achieve the effect of low cost, simple operation and efficient recovery
CN113106252APending Publication Date: 2021-07-13苏州硒诺唯新新材料科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
苏州硒诺唯新新材料科技有限公司
Publication Date
2021-07-13

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Abstract

The invention relates to the technical field of separation of precious metal in solutions, in particular to a method for removing palladium from a silver electrolyte by using a multifunctional silica gel adsorbent. The method comprises following steps that (1) the multifunctional silica gel adsorbent is obtained; (2) adsorption is carried out, wherein the multifunctional silica gel adsorbent is added into the silver electrolyte to carry out stirring adsorption treatment, components of the silver electrolyte comprise 25 g / L-250 g / L of silver, 0.005 g / L-1 g / L of palladium, 0 g / L-40 g / L of copper and 1 g / L-15 g / L of nitric acid, and the addition amount of the multifunctional silica gel adsorbent is 0.5 g / L-100 g / L; (3) analyzing is carried out; and (4) regenerating is carried out. According to the method for removing palladium from the silver electrolyte by using the multifunctional silica gel adsorbent, efficient selective adsorption of palladium can be achieved, and in the silver electrolyte with the silver content being 25 g / L-250 g / L and the palladium content being 0.005 g / L-1 g / L, the adsorption rate of palladium reaches 99% or above, and the adsorption rate of silver is 0%.
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Description

Technical field

[0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the separation of precious metals in a solution, and more particularly to a method of removing palladium from a silver electrolyte by multifunctional silica adsorbent. Background technique

[0002] Silver refining mainly used electrolytic refining method, and its electrolyte is a silver nitrate solution. As the electrolytic refining is carried out, the metal in the anode plate will constantly dissolve, resulting in PD 2+ Cu 2+ , BI 3+ Plasma accumulates in the silver electrolyte. After several cycles of the electrolytic solution, the metal in the electrolyte continues to rise, easy to be reduced as a metal, precipitated on the cathode, thereby affecting the quality of the silver product, wherein the palladium is similar to the silver reduction potential. The main impurities of the product quality, therefore is necessary to purify palm in the silver electrolyte.

[0003] M...

Claims

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