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Method for directionally separating out palladium from silver nitrate mixing solution containing palladium

A technology of directional separation and silver nitrate, applied in the field of wastewater treatment, can solve the problems of high metal co-precipitation rate, easy damage to the nitric acid system, poor separation effect of palladium, etc., and achieve the effect of shortening the process flow

Inactive Publication Date: 2019-01-25
YUNNAN COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for the directional separation of palladium from the palladium-containing silver nitrate mixed solution, aiming to solve the problem that the method for separating palladium from the palladium-containing silver nitrate mixed solution in the prior art is easily damaged. Nitric acid system and other metal co-precipitation rate are high, resulting in poor palladium separation effect

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  • Method for directionally separating out palladium from silver nitrate mixing solution containing palladium

Examples

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Effect test

Embodiment 1

[0033] A batch of palladium-containing silver nitrate mixed solution A was produced in a comprehensive recovery process of copper anode slime in a copper smelter, in which the concentration of nitric acid was 10.3g / L, the palladium content was 0.36g / L, the silver content was 248g / L, and the copper content was 24.83 g / L, containing bismuth 0.048g / L, containing platinum 0.074g / L, containing gold 0.005g / L, containing selenium 0.001g / L, containing 0.001g / L tellurium.

[0034] Configure palladium separating agent: weigh and analyze 150g of sodium hydroxide and 1L of water to prepare a sodium hydroxide solution with a mass concentration of 15%, then add 50g of diacetyldioxime to it, and fully stir until completely dissolved;

[0035] Take 50L of palladium-containing silver nitrate mixed solution A, transfer it to a reaction kettle and heat it to 60°C with a steam jacket, and keep the temperature constant. Mix well, then slowly add 360 mL of palladium separating agent, stir for 3 hou...

Embodiment 2

[0038]A batch of palladium-containing silver nitrate mixed solution B was produced in the comprehensive recovery process of copper anode slime in a copper smelter, in which the concentration of nitric acid was 8.4g / L, the palladium content was 0.15g / L, the silver content was 198g / L, and the copper content was 20.4 g / L, containing bismuth 0.05g / L, containing platinum 0.044g / L, containing gold 0.005g / L, containing selenium 0.001g / L, containing 0.001g / L tellurium.

[0039] Configure palladium separating agent: weigh and analyze 150g of sodium hydroxide and 1L of water to prepare a sodium hydroxide solution with a mass concentration of 15%, then add 50g of diacetyldioxime to it, and fully stir until completely dissolved;

[0040] Take 45L of palladium-containing silver nitrate mixed solution B, transfer it to a reaction kettle, heat it to 50°C with a steam jacket, and keep the temperature constant, then add 1.8L of reagent nitric acid to the palladium-containing silver nitrate mixe...

Embodiment 3

[0043] A batch of palladium-containing silver nitrate mixed solution C was produced in the comprehensive recovery process of copper anode slime in a copper smelter, in which the concentration of nitric acid was 9.2g / L, the palladium content was 0.22g / L, the silver content was 210g / L, and the copper content was 21.3 g / L, containing bismuth 0.06g / L, containing platinum 0.082g / L, containing gold 0.005g / L, containing selenium 0.001g / L, containing 0.001g / L tellurium.

[0044] Configure palladium separating agent: weigh and analyze 150g of sodium hydroxide and 1L of water to prepare a sodium hydroxide solution with a mass concentration of 10%, then add 60g of diacetyldioxime to it, and stir until completely dissolved;

[0045] Take 60L of palladium-containing silver nitrate mixed solution C, transfer it to a reaction kettle, heat it to 60°C with a steam jacket, and keep the temperature constant, then add 3.6L of reagent nitric acid to the palladium-containing silver nitrate mixed sol...

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Abstract

The invention discloses a method for directionally separating out palladium from a silver nitrate mixing solution containing palladium. The method comprises the steps that dimethylglyoxime is dissolved into an alkaline solution to obtain a palladium separating agent; acid treatment is performed on the silver nitrate mixing solution containing palladium, heating is performed, then, the palladium separating agent is added to perform a reaction till complete precipitation is performed, and precipitations are separated out, washed and dried to obtain a palladium separated product. In the separation method process, no influence is caused to silver, copper and other elements, the silver nitrate solution obtained after palladium separation can be further separated and purified to obtain other metals, the content of palladium in the separated product is high, the content of other impurities is low, the technological flow for follow-up purification is shortened, and therefore the problems thatin the prior art, according to an existing method for separating palladium from the silver nitrate mixing solution containing palladium, a nitric acid system is likely to be damaged, and the coprecipitation efficiency of other metals is high, so that the palladium separation effect is not good are solved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for directional separation of palladium from palladium-containing silver nitrate mixed liquor. Background technique [0002] Palladium is widely used in national production and life, and is an important scattered metal element. Affected by its small content, the recovery of palladium is basically realized through the comprehensive recovery of non-ferrous metals and precious metals. At this stage, the separation of palladium under the hydrochloric acid system has been deeply studied, and various effective recovery methods such as different modified ion exchange resin adsorption and molecular recognition have been proposed, but there are few studies under the nitric acid system. The process based on the hydrochloric acid system has little effect under the nitric acid system. [0003] At present, the methods for separating palladium from palladium-containing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B3/44
CPCC22B3/44C22B11/042Y02P10/20
Inventor 王鹏程王冲孔德颂叶钟林段建锋罗劲松李东升章尙发刘家琛陈雄杨坤彬徐刚芳
Owner YUNNAN COPPER CO LTD
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