Ethyl tert-butyl ether

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Ethyl tert-butyl ether[1]
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Abbreviations ETBE
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Template:Longitem Template:Chembox Elements/molecular formula
Molar mass 102.18
Appearance Clear colorless liquid
Density 0.7364 g/cm3
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Ethyl tertiary-butyl ether (ETBE), also known as ethyl tert-butyl ether, is commonly used as an oxygenate gasoline additive in the production of gasoline from crude oil. ETBE offers equal or greater air quality benefits than ethanol, while being technically and logistically less challenging. Unlike ethanol, ETBE does not induce evaporation of gasoline, which is one of the causes of smog, and does not absorb moisture from the atmosphere.

Production

Ethyl tert-butyl ether is manufactured industrially by the acidic etherification of isobutylene with ethanol at a temperature of 30–110 °C and a pressure of 0,8–1,3 MPa. The reaction is carried out with an acidic ion-exchange resin as a catalyst.[2]

Synthesis of Ethyl tert-butyl ether
Synthesis of Ethyl tert-butyl ether

Suitable reactors are fixed-bed reactors such as tube bundle or circulation reactors in which the reflux can be cooled optionally.[2]

Ethanol, produced by fermentation and distillation, is more expensive than methanol, which is derived from natural gas. Therefore, MTBE, made from methanol, is cheaper than ETBE, made from ethanol.

See also

References

  1. ↑ Merck Index, 11th Edition, 3732.
  2. ↑ a b Script error: No such module "citation/CS1".

External links

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