| 摘要 |
<p>This invention relates to a process for direct synthesis of potassium gold cyanide by controlled-potential method and an apparatus thereof. In the said process, an apparatus is used, which contains a reaction vessel with a built-in stirrer, a temperature sensor, a gold electrode, a reference electrode, and a baffle, as well as a temperature display, a potentiometer, and containers provided with controlling valve for solutions of potassium cyanide and hydrogen peroxide set up above the reaction vessel. Potassium gold cyanide is directly synthesized by using gold powder, potassium cyanide, and hydrogen peroxide as starting materials in the reaction vessel, and by controlling the feed rate of the solutions and an appropriate gold potential and temperature. In comparison with the processes in the prior art, this process provides a faster reaction speed and is cost-effective, easy in operating and controlling. It remarkably improves the purity of the product and the production efficiency while lowering the cost. The said apparatus has a reasonable design, which provides a smaller volume, stable performance, and safe and reliable utility.</p> |
