| High purity gold is widely used in electronic industry and other fields, and the demand is increasing. Based on the analysis of 30 recent literatures, the preparation technologies of high purity gold were summarized, and their advantages and disadvantages were reviewed. The electrolysis, chemical reduction and solvent extraction methods have been applied in the related enterprises, but there are different degrees of problems in product purity and stability, raw material adaptability, production period and environmental pollution issues. The requirement of gold purity will be higher and higher with the continuous iterative upgrading of electronic industrial technology in the future. Therefore, it is necessary to further develop the preparation technology of high pure gold and prepare high pure gold products with higher purity. |
