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[Chemical Knowledge]：What are the upstream raw materials of D4 and what are the downstream products?

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D4, also known as cyclobutadiene, is an important chemical raw material that is widely used in the production of many chemicals. The following are some examples of upstream and downstream related products of D4 in the field of raw materials for chemical production.

1. Upstream Products

* Ethylene: D4 is mainly produced by ethylene cracking. Ethylene is an important basic chemical raw material, mainly from petrochemical industry.
* Butadiene: Butadiene is another raw material for the production of D4, mainly obtained by petroleum cracking and ethylene oxidation processes.

2. Downstream product

* Styrene-butadiene rubber: D4 can be copolymerized with styrene to produce styrene-butadiene rubber, which is a widely used synthetic rubber.
* nitrile rubber: D4 and acrylonitrile copolymerization, can get nitrile rubber, oil resistance, excellent heat resistance.
* Plastic: D4 can also be used to produce some plastic products, such as polycyclobutadiene plastic, which has high impact strength and heat resistance.
* Antioxidants: Derivatives of D4, such as tetrahydrofuran, can be used as antioxidants.

above is only part of the upstream and downstream related products of D4. In fact, D4 is widely used in the chemical industry, and there are many other upstream and downstream related products. Under different production processes and conditions, the upstream and downstream products of D4 will be different, and the specific product types and output will also vary due to changes in production processes and conditions. If necessary, it is recommended to consult the relevant literature on raw materials for chemical production or to consult a professional for more comprehensive information.

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