Patent ID: 9365478
Filing Date: 2016-06-14
CPC Classification: C07C

Claim Text:
1. A process for the direct synthesis of an unsaturated aldehyde of formula CH 2 ═C(R)—CHO, wherein R represents H or CH 3 , from a feedstock containing an alcohol mixture comprising methanol and a second alcohol of formula R—CH 2 —CH 2 OH, the process comprising: introducing the alcohol mixture, oxygen and an unreactive diluent gas into a reaction system comprising a solid selective oxidation catalyst chosen from molybdenum-based catalysts and optionally a solid aldol condensation catalyst, wherein said reaction system is operated in the gas phase at a temperature of between 200 and 400° C. and under a pressure of between 1 and 10 bar absolute, and wherein the alcohol mixture and the oxygen each represent at most 10% of a total volume of a reaction mixture in the reaction system, and recovering a gaseous effluent comprising the formed unsaturated aldehyde and water, coproduced by the reaction, at an outlet of the reaction system.