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[Chemical Knowledge]：Xenon production and manufacturing methods and processes

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The manufacturing method
of xenon
Xenon is a rare inert gas, which has the characteristics of high density, high boiling point and low reactivity, so it is widely used in chemical industry, medical treatment, electronics and other fields. This article will introduce the manufacturing method of xenon in the field of chemical production raw materials.

1. air separation method

air separation method is one of the commonly used xenon manufacturing methods, and its process mainly includes compression, purification, cooling, separation and other steps. The specific process is as follows:

1. Compressed air: the air is compressed to a certain pressure to increase the concentration of each component in the air.
2. Purify air: remove moisture, carbon dioxide and other impurities in the air through adsorbents such as molecular sieves.
3. Cooling air: The purified air is cooled below the liquefaction temperature to condense the nitrogen, oxygen and other components into liquid.
4. separation of liquid air: using the characteristics of different boiling points of each component, liquid nitrogen, liquid oxygen and other products are separated by distillation, and xenon rich tail gas rich in xenon gas is obtained at the same time.

2. adsorption method

adsorption method is a relatively new xenon manufacturing method, which mainly uses the selective adsorption of adsorbent to separate xenon from the air. The specific process is as follows:

1. Air compression: The air is compressed to a certain pressure to increase the concentration of each component in the air.
2. Adsorption purification: the compressed air through the adsorbent to remove the moisture, carbon dioxide and other impurities.
3. Adsorption and separation: Let the purified air pass through another adsorbent to selectively adsorb nitrogen, oxygen and other components in the air, while xenon is weakly adsorbed by the adsorbent, thereby obtaining xenon-rich exhaust gas.
4. desorption regeneration: by heating or depressurization and other methods, so that the adsorbent on the desorption of xenon, to obtain high purity xenon products.

3. membrane separation

membrane separation is a method of separating xenon from air by selective permeation of polymer membrane. The specific process is as follows:

1. Air compression: The air is compressed to a certain pressure to increase the concentration of each component in the air.
2. Membrane separation: Let compressed air pass through the polymer membrane. Due to the different permeability of the membrane to each component, the permeation rate of nitrogen, oxygen and other components is faster, while the permeation rate of xenon is slower, so that the permeation side of the membrane is rich Xenon tail gas.
3. Purification and purification: the tail gas rich in xenon is further purified and purified to obtain high-purity xenon products.

The above three methods can be used for the manufacture of xenon, but each method has its own advantages and disadvantages, and should be selected according to the actual situation. The air separation process is mature, but the equipment investment is large; the adsorption method has the advantages of simple equipment and convenient operation, but the adsorbent needs to be replaced regularly; the membrane separation method has compact equipment and low energy consumption, but the performance requirements of the membrane are higher.

No matter which method is used, the prepared xenon gas needs to be further purified and processed to meet the requirements of different fields for the purity and quality of xenon gas. At the same time, it is necessary to pay attention to safety during the production process to avoid leakage and pollution.

In short, the manufacturing method of xenon gas needs to be selected according to the actual situation. Different methods have their own advantages and disadvantages, but they all need to ensure the purity and quality of the product to meet the application needs of different fields.

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