Patent ID: 11358911

Abstract:
A process for dehydrating an ethanol feedstock to give ethylene, includes:a) a vaporization stage;b) a heating stage;c) a dehydration stage in a multitubular reactor comprising tubes having a length of between 2 and 4 m, said tubes comprising a, preferably zeolitic, dehydration catalyst, the feedstock having an inlet temperature of greater than 400° C. and less than 550° C. and an inlet pressure of between 0.8 and 1.8 MPa, the heat transfer fluid having an inlet temperature of greater than 430° C. and less than 550° C. and a mass flow rate such that the ratio of the mass flow rates of the heat transfer fluid relative to the feedstock is greater than or equal to 10;d) separation into an effluent comprising ethylene and an aqueous effluent;e) purification of the aqueous effluent and separation of a stream of purified water and a stream of unconverted ethanol.