Method for dehydrating alcohols into olefins with energy optimization

WO2026124971A1PCT designated stage Publication Date: 2026-06-18IFP ENERGIES NOUVELLES +1
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
IFP ENERGIES NOUVELLES
Filing Date
2025-11-25
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Existing alcohol dehydration processes for producing olefins are energy-intensive and costly due to the use of compressors for vaporizing thermal diluents like water, necessitating a more efficient and cost-effective method to reduce energy consumption and investment costs.

⚗Method used

A process involving the vaporization of alcohol feed mixed with an inert gas stream, followed by dehydration in a series of adiabatic reactors, with recycling of olefins to optimize energy recovery and eliminate the need for compressors, while maintaining high selectivity and conversion.

🎯Benefits of technology

The process achieves reduced energy consumption and operational costs, along with improved selectivity and conversion, by recycling olefins and using an inert gas diluent, thus simplifying the process and minimizing equipment requirements.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to a method for dehydrating an alcohol feedstock comprising: a) vaporizing said alcohol feedstock mixed with a gas stream, b) introducing said alcohol feedstock, vaporized and mixed with said gas stream, into a set of at least two adiabatic reactors, c) separating the effluent from the last adiabatic reactor of step b) into an effluent comprising the olefin(s) corresponding to the dehydration of the feedstock and an aqueous effluent, d) compressing the effluent comprising the olefin(s), resulting from step c), in at least one compressor, e) dividing the compressed effluent resulting from step d) into two fractions, then f) partly or entirely recycling a first fraction of the compressed effluent, upstream of step a) to constitute said gas stream.
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