Method for producing silver potassium cyanide

A technology of potassium silver cyanide and potassium cyanide, which is applied in the direction of metal cyanide and compound cyanide, can solve the problems of cumbersome operation, irregular process route, low purity of silver potassium cyanide, etc., and improve the purity and water content Low, increase the effect of detection and filtering

Inactive Publication Date: 2013-01-16
河南银城科技股份有限公司
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Problems solved by technology

The traditional production method has the shortcomings of irregular process route, cumbersome operation, and low purity of silver potassium cyanide obtained.

Method used

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with specific embodiments.

[0017] A method for producing silver potassium cyanide, it comprises the following steps:

[0018] 1) Put 1KG silver into 1.7KG1:1 dilute nitric acid solution, fully dissolve to obtain silver nitrate solution;

[0019] 2) Heat and ventilate to make the silver ion content in the silver nitrate solution 90g / L;

[0020] 3) Measure the pH value of the silver nitrate solution, add ammonia water at the same time to make the pH value of the silver nitrate solution 5-6, and obtain the silver nitrate neutralization solution;

[0021] 4) Spray the silver nitrate neutralization solution into the solution containing 0.625KG potassium cyanide. After the reaction is completed, release the reaction solution and filter to obtain the silver cyanide precipitate;

[0022] 5) Wash the silver cyanide precipitate with water to remove nitrate, and detect that it does not contain nitrate, and ob...

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Abstract

The invention discloses a method for producing silver potassium cyanide. The silver potassium cyanide with high purity can be obtained by steps of dissolving, detecting, neutralizing, precipitating, cleaning, detecting, dissolving again, cooling for crystallization, leaching, washing and the like. Compared with conventional production methods, the method for producing silver potassium cyanide is added in multi-time detection and filtering and improved in purity of final product, and vacuum drying is simultaneously performed, so that water content of the obtained silver potassium cyanide is low, and product quality is improved.

Description

technical field [0001] The invention relates to the synthetic field of cyanide, in particular to a method for producing potassium silver cyanide. Background technique [0002] The method for producing potassium silver cyanide introduced in the "Inorganic Compound Preparation Handbook" (volume three) published in Japan is the production method commonly used at present, that is: dissolve silver metal with 1: 1 nitric acid, and evaporate the silver nitrate solution obtained To remove excess nitric acid, after cooling to obtain silver nitrate crystals, after filtering and drying, by calculating the silver nitrate and potassium cyanide molar ratio of 1:1, the concentration of silver nitrate and potassium cyanide solutions were prepared respectively, and stirred Next, add silver nitrate to potassium cyanide solution to precipitate silver cyanide, and then react silver cyanide with potassium cyanide at a molar ratio of 1:1 to obtain potassium silver cyanide. The traditional produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C3/11
Inventor 常运来张孟更张铁军闫小亮
Owner 河南银城科技股份有限公司
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