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[Chemical Knowledge]：What are the upstream raw materials for diphenyl ethers? What are the downstream products?

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Diphenyl ether has an important position in the field of chemical production raw materials, and its upstream and downstream related products are extensive. The upstream and downstream associated products of diphenyl ether will be described in detail below.

upstream products:

1. Phenol: Phenol is an important upstream raw material of diphenyl ether. Diphenyl ether can be produced by the condensation reaction of phenol and phenol. The production process of phenol mainly includes sulfonation method, chlorination method and cumene method.
2. Catalyst: In the production process of diphenyl ether, it is necessary to use a catalyst to improve the reaction efficiency and selectivity. Commonly used catalysts include acidic catalysts and basic catalysts.

downstream products:

1. Flame retardant: Diphenyl ether can be used as a raw material for flame retardants to produce flame retardant polymers. For example, the reaction of diphenyl ether and formaldehyde can produce phenolic resin, which has good flame retardant properties.
2. Plasticizers: Diphenyl ethers can also be used to produce plasticizers to improve the flexibility and processing properties of plastics. Common plasticizers include phthalic acid esters, terephthalic acid esters, etc.
3. Pesticides: Diphenyl ether derivatives can be used as pesticides for pest control. For example, some diphenyl ether compounds have bactericidal, insecticidal and herbicidal effects.
4. spices: diphenyl ether can also be used in the production of spices, for the modulation of various flavors and perfumes.

In short, diphenyl ether has a wide range of applications in the field of chemical production raw materials, and its upstream and downstream related products cover flame retardants, plasticizers, pesticides and spices.

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