Abstract

The dehydration of tert.-butyl alcohol in the liquid phase has been investigated on BPO catalysts with phosphorus/boron molar ratios from 0.8 to 1.4 and pretreatment temperatures up to 400 °C. A maximum in the initial reaction rate occurs at a P/B of 1.25 and a pretreatment temperature of 100 °C. The reaction is catalyzed by Brønsted acid sites and not Lewis acid centers and appears to proceed through a carbonium ion mechanism.

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