The preparation of platinum catalyst is a delicate and complex process. Taking platinum complex catalyst as an example, the preparation process begins with the mixing of chloroplatinic acid solution with allyl double head and ethanol solution. This step requires precise control of the ratio of the reactants and the temperature and time of the heated reflux to ensure that the platinum ions react adequately with the head molecules. Then, by adding sodium bicarbonate to adjust the pH value and steaming the solvent, the platinum complex can be obtained. Finally, the platinum complex is dissolved in vinyl silicone oil, and after a series of treatments, an efficient platinum catalyst can be prepared.

However, platinum catalysts may lose their catalytic activity during use due to contact with organic compounds containing elements such as nitrogen, phosphorus, sulfur, or ionic compounds containing heavy metals such as tin, lead, mercury, bismuth, and arsenic. These substances will react with the platinum catalyst, causing its structure to change, which will affect the catalytic effect.

In order to make effective use of this scarce resource, inactive platinum catalysts can be processed through secondary recovery and re-refining. During the recycling process, it is first necessary to pretreat the waste to remove impurities and contaminants. Then, advanced extraction technologies, such as electrolysis and chemical precipitation, are used to extract the residual platinum from the waste. After refining and purification, these platinum alloys can be reused for the preparation of platinum catalysts to achieve resource recycling.

The preparation and recovery of platinum catalyst is not only related to the performance and life of the catalyst, but also to the conservation of resources and environmental protection. Through sophisticated preparation processes and efficient recycling technologies, we can make better use of this valuable resource and promote the sustainable development of the chemical industry.

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