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

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Methanol is an important organic chemical raw material, which is widely used in the production of various chemicals and fuels. In the field of chemical production raw materials, the upstream and downstream related products of methanol are very rich. The following are some of the main upstream and downstream associated products of methanol:

Upstream products:

1. Natural gas: The production of methanol mainly uses natural gas as a raw material to produce methanol through synthesis gas (a mixture of carbon monoxide and hydrogen).
2. Coal: Coal is also one of the important raw materials for methanol production, which is prepared by gasification and synthesis reaction.
3. Carbon dioxide: In some methanol production processes, carbon dioxide can also be used as a raw material to participate in the reaction.

Downstream products:

1. Formaldehyde: Methanol oxidation can obtain formaldehyde, which is an important organic chemical raw material for the production of phenolic resin, urea-formaldehyde resin, vinylon, urotropine, pentaerythritol, etc.
2. dimethyl ether: dimethyl ether can be obtained by dehydration of methanol, which is a clean fuel and can be used to replace liquefied petroleum gas.
3. Acetic acid: Acetic acid can be obtained by carbonylation of methanol, which is an important organic acid and used in the production of cellulose acetate and acetate.
4. Methyl tert-butyl ether (MTBE): It is prepared by the reaction of methanol and isobutylene. It is a high octane gasoline additive.
5. Methyl methacrylate (MMA): prepared by the reaction of methanol, acetone cyanohydrin and sulfuric acid, used in the production of organic glass.
6. Dimethyl terephthalate (DMT): prepared by the esterification of terephthalic acid and methanol, used in the production of polyester fibers, etc.

above is only a part of the upstream and downstream related products of methanol. In fact, methanol is widely used in chemical production and is related to many chemicals and materials.

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