| Ethyl tert-butyl ether[1] | |
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| IUPAC name |
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| Other names | Ethyl tert-butyl ether Ethyl tertiary butyl ether Ethyl tert-butyl oxide tert-Butyl ethyl ether Ethyl t-butyl ether |
| Identifiers | |
| Abbreviations | ETBE |
| CAS number | [] |
| PubChem | |
| EC number | |
| RTECS number | KN4730200 |
| SMILES |
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| InChI |
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| Properties | |
| Molecular formula | C6H14O |
| Molar mass | 102.17 g mol−1 |
| Appearance | Clear colorless liquid |
| Density | 0.7364 g/cm3 |
| Melting point |
-94 °C, 179 K, -137 °F |
| Boiling point |
69-71 °C |
| Solubility in water | 1.2 g/100 g |
| Hazards | |
| R-phrases | R11 R20 |
| S-phrases | S16 |
| Flash point | -19 °C |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references |
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Ethyl tert-butyl ether (ETBE) is commonly used as an oxygenate gasoline additive in the production of gasoline from crude oil. ETBE offers equal or greater air quality benefits as 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.
Contents |
Synthesis
It is synthesized by mixing ethanol and isobutylene and reacting them with heat over a catalyst.
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. However, (bio)ethanol makes ETBE partially a biofuel, while MTBE is entirely a fossil fuel and introduces a risk to the environment (see the article on MTBE).
See also
References
- ^ Merck Index, 11th Edition, 3732.
External links
- EFOA
- ETBE Product Bulletin
- EC Joint Research Centre ETBE risk assessment report
- Fuel Quality Directive Impact Assessment
- Council Directive 85/536/EEC of 5 December 1985 on crude-oil savings through the use of substitute fuel components in petrol
- An assessment of the impact of ethanol-blended petrol on the total NMVOC emission from road transport in selected countries
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