How does three-way catalysis refine precious metals?What precious metals can be refined by three-way catalysis

threeYuanThe role of the catalytic converter is to react with the exhaust gas emitted by the car, which can catalyze or change the nature of harmful emissions, reduce the pollution of harmful emissions, and have the effect of purifying the exhaust gas.

The method of refining precious metals in a three-way catalytic converter is:

1. Grind the catalyst inside the three-way catalyst into powder. The outside of the three-way catalyst is iron, the inside is ceramic, and the precious metal is a layer of catalyst coated on the inside;

2. The powder ground from the catalyst is burned at a high temperature;

3. Add sodium borohydride aqueous solution and cook to 100 degrees, then add sodium chlorite hydrochloric acid solution;

4. The temperature will continue to be around 100 degrees, and it will slowlydiscoverThere will be particles under the solution, which can be filtered after 3 hours, and solid particles can be obtained after the filtration is completed;

5. Add 10% HC1 and aqueous solution for pickling and water washing. Keep it at about 100 degrees. After separation, platinum metal can be obtained.

What precious metals can be refined by three-way catalysis

The three-way catalytic converter can extract precious metals such as palladium, rhodium and platinum, which causes the high price of the three-way catalytic converter. As long as the engine malfunctions, it is easy to cause damage to the three-way catalytic converter. After the three-way catalytic converter is damaged, most of the three-way catalytic converter cannot be repaired. You can only replace the three-way catalytic converter. If you just clean the three-way catalytic converter, it is There is no effect. After cleaning, the exhaust gas purification effect of the three-way catalytic converter may be reduced.

Because the three-way catalytic converter contains rare metals such as palladium, rhodium, and platinum, the prices of rare metals are relatively expensive. Moreover, the three-way catalytic converter is under the vehicle, so many thieves will attack it and sell it directly after stealing it, or by extracting rare metals and selling it. The owner of the vehicle usually needs it when it is used in the car. Pay attention to prevent being stolen.