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[Chemical Knowledge]：What are the upstream raw materials for terephthalic acid? What are the downstream products?

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Terephthalic acid (PTA) is an important organic chemical raw material, which is widely used in the production of polyester fiber, polyester resin, film and other products. In the field of chemical production raw materials, the upstream and downstream related products of terephthalic acid are very rich, and some of the main products will be described in detail below. Upstream products of

:

1. p-xylene (PX): The main raw material of terephthalic acid is p-xylene, and terephthalic acid is obtained through oxidation reaction.

downstream products:

1. Polyester fiber (PET fiber): Terephthalic acid reacts with ethylene glycol to obtain polyester. Polyester is made into polyester fiber through the spinning process, which is widely used in textiles, clothing and other fields.
2. polyester resin (PET resin): terephthalic acid and ethylene glycol reaction to obtain polyester, polyester further processed into polyester resin, used in the manufacture of bottles, cans, films and other packaging materials.
3. Polybutylene terephthalate (PBT): Terephthalic acid reacts with 1,4-butanediol to obtain polybutylene terephthalate, which is used in the manufacture of engineering plastics, electrical parts, etc.
4. Polyether ether ketone (PEEK): Using terephthalic acid as raw material, polyether ether ketone is prepared through a series of reactions. It has excellent properties such as high temperature resistance and chemical corrosion resistance. It is used in the manufacture of aerospace, automotive, and electronics. Parts and components in other fields.

In summary, terephthalic acid has a very important position in the field of chemical production raw materials, and its upstream and downstream related products are widely used in various fields.

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