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[Chemical Knowledge]：Manufacturing method and process flow of argon gas

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Argon is a rare gas with stable chemical properties and a wide range of applications. In the field of chemical production raw materials, argon manufacturing methods are mainly the following:

1. air separation method to produce argon

air separation method to produce argon is one of the commonly used manufacturing methods. The method uses the trace argon contained in the air to liquefy the air by cryogenic separation technology, and then carries on the rectification separation to obtain the argon with high purity. The specific process is as follows:

(1) Air compression: Compress air to a certain pressure to meet the requirements of subsequent processes.

(2) Air purification: Remove moisture, carbon dioxide and other impurities in the air through filters and other equipment.

(3) Air liquefaction: The purified air is cooled to the liquefaction temperature to make it liquid.

(4) Distillation separation: the use of liquid air in the boiling point of each component is different, through the distillation column for separation, to obtain a higher purity of argon.

2. Tungstate decomposition method to produce argon

tungstate decomposition method to produce argon is an earlier manufacturing method, but the current application is less. This method uses the principle that tungstate decomposes at high temperature to generate argon and tungsten oxide, and obtains argon with high purity by controlling the decomposition conditions. The specific process flow is as follows:

(1) The tungstate is heated to a certain temperature to decompose it to generate argon and tungsten oxide.

(2) The generated argon gas and impurities are separated by means of cooling, dust removal and the like.

(3) through further purification and purification, high purity argon.

3. argon production by membrane separation

membrane separation is a new manufacturing method, which has the advantages of low energy consumption and simple operation. The method uses the difference in the permeation rate of different gases in the membrane to separate the argon in the air through the membrane separation technology. The specific process flow is as follows:

(1) Compress air to a certain pressure and pass through a membrane separator.

(2) Due to the faster permeation rate of argon in the membrane, it can pass through the membrane separator, while gases such as nitrogen and oxygen are retained on one side of the membrane.

(3) By adjusting the process parameters, the permeation rate and purity of argon are controlled to obtain argon products that meet the requirements.

In short, there are many manufacturing methods of argon, and different methods have different advantages and disadvantages and scope of application. In actual production, suitable manufacturing methods should be selected according to specific needs and conditions to ensure product quality and production efficiency.

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