THE COMMERCIAL APPLICATION OF SUPERLIG~R MOLECULAR RECOGNITION TECHNOLOGY PRODUCTS TO RECYCLING OF POTASSIUM GOLD CYANIDE FROM SPENT GOLD PLATING SOLUTIONS

摘要

In technical gold plating, potassium gold cyanide (PGC) is still the most commonly used base for the gold plating electrolyte. The specifications for the plating electrolyte solutions are particularly tight in the electronics sector and the baths must be periodically replaced due to the buildup of various impurities. The conventional process for production of potassium gold cyanide is to recover the gold from the plating solution in metallic form, refine it, and use it for the production of new potassium gold cyanide. The molecular recognition technology (MRT) process enables recovery of the potassium gold cyanide directly from the spent plating solution and direct conversion back into PGC. This eliminates a number of unit operations and greatly reduces the processing time, resulting in substantial cost savings.