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[Chemical Knowledge]：What are the upstream raw materials for R22 (chlorodifluoromethane) and what are the downstream products?

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R22 (difluorochloromethane) is a common refrigerant, which is widely used in air conditioning, refrigeration and chemical industry. In the field of raw materials for chemical production, the upstream and downstream related products of R22 mainly include the following categories:

1. Upstream products:

(1) Hydrogen fluoride: Hydrogen fluoride is one of the important raw materials for the production of R22, and it can react with chlorine to generate chlorodifluoromethane.

(2) Chloromethane: Chloromethane can also react with fluorine to form chlorodifluoromethane, which is another important raw material for R22 production.

2. Downstream products:

(1) Polytetrafluoroethylene (PTFE):R22 can be used as one of the raw materials for the production of PTFE, and PTFE is produced through polymerization. PTFE has excellent corrosion resistance, high temperature resistance and low friction performance, widely used in chemical, mechanical, electronic and other fields.

(2) Fluororubber: R22 can also be used to produce fluororubber. Fluororubber has the characteristics of high temperature resistance, oil resistance, acid and alkali resistance, and is used to manufacture seals, O-rings, etc.

(3) Fluorine-containing fine chemicals: R22 can also be used as raw materials to produce some fluorine-containing fine chemicals, such as fluoroalcohols, fluoroethers, fluoroacids, etc. These compounds have special physical and chemical properties and can be used in medicine, pesticides, liquid crystal materials and other fields.

In short, R22, as a common refrigerant, has a wide range of upstream and downstream related products in the field of chemical production raw materials, and plays an important role in promoting the development of the chemical industry.

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