Low-energy consumption method for dehydrating ethanol into ethylene
US11358911B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 27, 2019 |
| Grant date | Jun 14, 2022 |
| Priority date | — |
| Expiry date | Nov 27, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2529/40
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.