| abstract |
The invention relates to a process for the dehydration of an ethylene feedstock comprising at least the steps of: a) a step of pretreating the ethanol feedstock on an acid solid operating at a temperature of between 100 and 130 ° C. in order to produce a pretreated ethanol feedstock; b) a step of vaporizing a vaporization charge comprising said pretreated ethanol feedstock in a heat exchanger, said vaporization charge being introduced into said vaporization step at a pressure of between 0.1 and 2, 5 MPa so as to produce a vaporized charge, c) a step of superheating said vaporized charge so as to bring it to an inlet temperature compatible with the temperature of the dehydration reaction, d) a step of dehydration of said feedstock resulting from step d) in at least one adiabatic reactor containing at least one dehydration catalyst and in which the reaction of die shydratation takes place, operating at an inlet temperature of between 350 and 550 ° C and at an inlet pressure of between 0.3 and 1.8 MPa, |