Dehydration of 2-(2-hydroxyethyl)-pyridine to 2-vinyl-pyridine over solid acid catalysts

Add time:08/12/2019    Source:sciencedirect.com

2-(2-Hydroxyethyl)-pyridine was dehydrated to 2-vinyl-pyridine in liquid phase over solid acid catalysts, with very high selectivity and fairly good reaction rate at relatively low reaction temperature (160°C). The catalytic activity is well correlated with the presence on the catalyst surface of medium to weak Brønsted acid sites. The analysis of “coke” left behind onto the catalyst and the effect of partial poisoning of catalystic activity by CO2 indicate that the reaction takes place through two mechanisms, involving either a Brønsted acid site or a couple of acid-base sites.

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