- Patent Title: Low-energy consumption method for dehydrating ethanol into ethylene
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Application No.: US17413080Application Date: 2019-11-27
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Publication No.: US11358911B2Publication Date: 2022-06-14
- Inventor: Kirill Drobyshev , Vincent Coupard , Nikolai Nesterenko , Jean-Christophe Gabelle
- Applicant: IFP Energies nouvelles , TOTAL RESEARCH & TECHNOLOGY FELUY
- Applicant Address: FR Rueil-Malmaison; BE Seneffe
- Assignee: IFP Energies nouvelles,TOTAL RESEARCH & TECHNOLOGY FELUY
- Current Assignee: IFP Energies nouvelles,TOTAL RESEARCH & TECHNOLOGY FELUY
- Current Assignee Address: FR Rueil-Malmaison; BE Seneffe
- Agency: Millen White Zelano & Branigan, PC
- Agent Brion P. Heaney
- Priority: FR1872972 20181214
- International Application: PCT/EP2019/082717 WO 20191127
- International Announcement: WO2020/120136 WO 20200618
- Main IPC: C07C1/24
- IPC: C07C1/24 ; B01J19/24
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.
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.
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