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[Chemical Knowledge]：What are the upstream raw materials for p-xylene? What are the downstream products?

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Paraxylene (PX) is an important raw material for chemical production, which is widely used in the fields of plastics, fibers, solvents and pesticides. The following are the upstream and downstream associated products of paraxylene:

Upstream products:

1. Naphtha: Naphtha is one of the main raw materials of paraxylene, and paraxylene can be obtained through processes such as catalytic reforming and aromatic extraction.
2. Methanol: Methanol can also be used to produce paraxylene, which can be converted to paraxylene through technologies such as methanol to aromatics.

downstream products:

1. purified terephthalic acid (PTA): p-xylene can be oxidized to produce purified terephthalic acid, which is an important polyester raw material for the production of polyester fiber, polyester film and other products.
2. Ethylene glycol (EG): Ethylene glycol can react with purified terephthalic acid to generate polyester chips, and further processing can generate polyester fibers, polyester bottles and other products.
3. Aniline: p-xylene can be converted into aniline, which is an important organic intermediate and can be used in the production of dyes, pharmaceuticals, pesticides and other products.
4. Butadiene: p-xylene can also be cracked to produce butadiene, which is an important raw material for synthetic rubber.

above is only a part of the upstream and downstream related products of p-xylene. In fact, p-xylene is widely used in the chemical industry, and its upstream and downstream products are also very rich.

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