Technoflux PQ Special Caustic Reagent – 1 kg

The Technoflux PQ Special Caustic Reagent is a product developed for the precipitation and recovery of gold from solutions generated during electropolishing and electroplating processes.

Operating Procedure

1. Add distilled water equivalent to 25%–50% of the initial solution volume.

2. Slowly add 50–100 g of PQ Caustic per litre of the original solution, before dilution, while stirring carefully. Continue stirring periodically for one hour.

3. After this period, the precious metals present in the solution should have been reduced, forming a dark precipitate.

4. Allow the solution to settle for several hours until the liquid becomes clear.

5. Separate the precipitate by filtration and wash it several times with distilled water until a neutral pH is achieved.

Important: Before disposing of the supernatant liquid, it is recommended to collect a sample of approximately 200 ml and repeat the process to check whether any dissolved precious metals remain.

The solid residues retained in the filter can be melted to form an ingot or treated with nitric acid diluted to 50% to dissolve copper and silver, leaving fine gold in powder form.

Safety Recommendations

This product may cause irritation to the eyes, skin and respiratory tract. Wear suitable protective clothing, gloves and appropriate personal protective equipment.