Method for producing silver potassium cyanide

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...