Gold Refining by Chlorine Ammonia Purifying

This invention published a process of gold refining by chlorine ammonia purification, which is conducted in the following procedures：impurity cleaning by nitric acid, filtering and washing, chlorine leaching for gold, filtering and washing, gold reduction, filtering and washing, and gold smelting. Among these, the effect of impurity cleaning by nitric acid can be up to 30%, gold recovery up to 99.99%; gold leaching rate up to 99%, gold reduction up to 99.99%; the gold bullion up to class 1 of the national standard.
Patent number：01100059.7