Process for the dehydration of oxygenated compounds

A process comprising dehydrating at least one oxygenated compound by feeding to a reactor a mixture comprising the oxygenated compound and at least one basic agent selected from the group consisting of ammonia (NH3) and an inorganic or organic compound comprising nitrogen capable of developing ammonia (NH3) during the dehydration, wherein the mixture is fed to the reactor so as to pass first through a first catalytic bed and subsequently through a second catalytic bed in the reaction,

• wherein the first catalytic bed comprises silica (SiO2), and the second catalytic bed comprises at least one dehydration catalyst selected from the group consisting of cerium oxide (CeO2), aluminum oxide (γ-Al2O3), aluminum silicate, silica-alumina (SiO2-Al2O3), alumina, a zeolite, a sulfonate resin, an ion exchange resin, and a metal oxide.

A process comprising dehydrating at least one oxygenated compound by feeding to a reactor a mixture comprising the oxygenated compound and at least one basic agent selected from the group consisting of ammonia (NH3) and an inorganic or organic compound comprising nitrogen capable of developing ammonia (NH3) during the dehydration, wherein the mixture is fed to the reactor so as to pass first through a first catalytic bed and subsequently through a second catalytic bed, in the reactor,

• wherein the first catalytic bed comprises silica (SiO2), and the second catalytic bed comprises at least one dehydration catalyst selected from the group consisting of ammonium phosphate and a metal phosphate.