The formation of byproducts in the reaction of synthesis of isopropyl tert-butyl ether from isopropyl alcohol and isobutene on an acidic macroporous copolymer
✍ Scribed by J. Tejero; A. Calderón; F. Cunill; J.F. Izquierdo; M. Iborra
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 831 KB
- Volume
- 33
- Category
- Article
- ISSN
- 1381-5148
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✦ Synopsis
The effect of temperature and of tire initial molar isopropanol-isobutene ratio, RNO, on byproducts formation in isopropyl reti-butyl ether (IPTBE) synthesis in the presence of tire resin Bayer K-2631 were determined. The formation of diisopropyl ether, diisobutene (2,4,4-trimethyl-I-pentene, and 2,4,4-trimethyl-2-pentene isomers), and tert-butanol was studied in the temperature range 30-80°C with R A,0 ranging from 1.0 to 4.3. The formation of teti-butanol is fast, and it reaches quickly the chemical equilibrium. The extent of the reaction is therefore limited by the amount of available water. The reactions forming 2,4,4-trimethyl-l-pentene, and 2,4,4-trimethyl-2-p take place gradually in the whole temperature range explored, whereas diisopropyl ether formation only occurs over 60°C once the reaction of IPTBE synthesis is close to equilibrium. These reactions are favoured by bigb temperatures. Low RAIO values favour isobutene dimerization and tert-butanol formation. The effect of R Ajo on the reaction forming diisopropyl ether is negligible.