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

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Phthalic ether (DME) is an important chemical raw material, widely used in medicine, pesticides, spices, dyes, plastics and other fields. The following are the upstream and downstream related products of phthalic ether:

Upstream products:

1. Phthalic anhydride: Phthalic anhydride is one of the main raw materials of phthalic ether, which is produced by esterification of phthalic anhydride and methanol.

2. Methanol: Methanol is another main raw material of phthalic ether, which reacts with phthalic anhydride to produce phthalic ether.

downstream products:

1. Diethyl phthalate (DEP): Phthalic ether can react with ethanol to form diethyl phthalate, which is an important plasticizer widely used in plastics Processing industry.

2. Dibutyl phthalate (DBP): Phthalic ether can also react with butanol to form dibutyl phthalate, which is also a common plasticizer used in plastics, rubber, Coatings and other fields.

3. Pharmaceutical intermediates: Phthalates can be used as pharmaceutical intermediates for the production of some drugs, such as anti-inflammatory drugs, antibacterial drugs, etc.

4. Pesticide intermediates: Phthalic ether can also be used to produce some pesticide intermediates, such as pesticides, fungicides, etc.

In short, as an important chemical raw material, phthalic ether has a wide range of applications in medicine, pesticides, plastics and other fields, and its upstream and downstream related products are also very rich.

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