There are many different processes and procedures that have been used over the years in order to try and achieve the highest purity of gold possible. However there has been one that has been able to be a lot more popular than many of the others, this process is the referred to as the “Miller Process”. The main goal of the process is to refine gold to an extremely high degree of purity, approximately 99.95 %. The process utilizes industrial scale chemicals in order to achieve this procedure. This process sees impure but crucible filled molten gold gets blown with pure chlorine gas. This process is what purifies the gold, as most other elements will form chlorides before the gold allowing the impure salts that are insoluble to be removed from the molten metal.
Once the impurities have been removed from the gold, the gold will then be removed and processed in whatever manor is necessary for sale. It’s important to note that the impurities will be noticeably removed once the color of flame is changed. The Miller process is one of the most commonly used procedures for producing a high purity gold for many different industries and products such as electronics and the manufacturing of silicates. The fact is that the Miller process is much faster and more efficient for industries that do not require the highest purity of gold. This is the reason that so many different companies and manufacturers still utilize the Miller Process, mainly for the quick turn around times and ease. However industries that require a higher or the highest purity of gold might have to utilize a different process that is slower and not as efficient. The fact is that there are other processes that produce a higher purity of gold up to 999.99 % purity.