Auric potassium cyanide and method for preparing same

Abstract

The invention discloses a method for making potassium auric cyanide, which uses potassuim cyanide and metallic gold as raw materials and matches the gold per kilogram with 1020-1030 grams of the potassuim cyanide. The method comprises the following: 1) a step of pressing gold, which is to roll the gold into a thin gold sheet as an electrode; 2) a step of electrolyzing, which is to carry out electrolysis reaction in a diaphragm electrolyzer with the thin gold sheet as an anode, a stainless steel sheet as a cathode and a potassuim cyanide solution as electrolyte, so as to gradually dissolve the thin gold sheet as the anode into Au(CN)2<->; 3) a step of purifying, which is to purify potassium auric cyanide generated in electrolysis through a low-temperature cooling crystallization method after the thin gold sheet is completely dissolved; 4) a step of condensing; 5) a step of purifying repeatedly; 6) a step of condensing; 7) a step of drying, which is to bake potassium auric cyanide crystals in vacuum so as to get a finished product. The adoption of the method shortens electrolysis time, reduces purifying times, and improves the quality and yield of potassium auric cyanide.

Description

A kind of potassium gold cyanide and preparation method thereof technical field The invention relates to potassium gold cyanide and a preparation method thereof. Background technique At present, there is an electrolytic method to prepare potassium gold cyanide, but because the gold content in the raw material is relatively low, and there are many electrolytes, the gold content decreases accordingly, which affects the quality of the product. Contents of the invention The invention provides potassium gold cyanide and a preparation method thereof, which can increase the gold content of potassium gold cyanide. For solving the above problems, the technical scheme of the present invention is as follows: a kind of potassium gold cyanide, it is raw material with potassium cyanide and metal gold, and every kilogram of gold proportioning is 1020-1030 gram potassium cyanide. The present invention also includes a kind of preparation method of potassium gold cyanide, and it is ra...

AI Technical Summary

Problems solved by technology

At present, potassium gold cyanide is prepared by electrolysis, but because the amount of gold in the raw material is relativ