Patent ID: 9725376
Date: 2017-08-08
CPC Classifications: C07C

Claim:
1. A process for dehydration of an ethanol feedstock into ethylene comprising at least the stages: a) pretreating the ethanol feedstock on an acidic solid operating at a temperature of between 100 and 130° C. in such a way as to produce a pretreated ethanol feedstock, b) evaporating an evaporation feedstock comprising said ethanol feedstock that is pretreated in a heat exchanger, with said evaporation feedstock being introduced into said evaporation stage at a pressure of between 0.1 and 2.5 MPa in such a way as to produce an evaporated feedstock, c) superheating said evaporated feedstock in such a way as to bring it to an inlet temperature that is compatible with the temperature of the dehydration reaction and, d) dehydrating said feedstock that is obtained from stage c) in at least one adiabatic reactor that contains at least one dehydration catalyst and in which the dehydration reaction 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.