Method for regenerating oligomer catalysts by purging

By regenerating the oligomer catalyst bed in situ through contact with oxygen at elevated temperatures and using carbon dioxide as an oxygen diluent, combined with zeolite and metal catalysts, the problem of oligomer catalyst regeneration was solved, achieving efficient conversion of bioethanol into distillate fuels and sustainable production.

CN122139017APending Publication Date: 2026-06-02UOP LLC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UOP LLC
Filing Date
2024-11-22
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In existing technologies, oligomer catalysts require periodic regeneration to maintain their activity, but the lack of effective regeneration methods leads to a decline in catalytic efficiency. Furthermore, improper carbon dioxide management during the conversion of bioethanol into distillate fuels affects sustainability and economic viability.

Method used

By regenerating the oligomerization catalyst bed in situ through contact with oxygen at elevated temperatures, and utilizing the carbon dioxide produced by fermentation as an oxygen diluent and purging agent, combined with zeolite catalysts and metal catalysts, the oligomerization and hydrogenation of olefins are achieved, generating sustainable jet fuels and diesel fuels.

Benefits of technology

Effective regeneration of oligomer catalysts improves catalytic efficiency, reduces carbon dioxide emissions, and enables the efficient conversion of bioethanol into distillate fuels, meeting the needs of sustainable development.

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Abstract

A method for oligomerizing olefins and converting them into distillate fuels, comprising in-situ regeneration of a first-stage oligomerizing catalyst bed and / or a second oligomerizing catalyst bed by contacting them with oxygen at elevated temperatures. Purging and pressurizing of the oligomerizing catalyst bed before regeneration, and maintaining pressure after regeneration, can be achieved using an inert gas supplied by carbon dioxide, generated by fermenting starch and sugar from biomass to produce alcohols or by carbon combustion during the regeneration process. The alcohols can also be dehydrated into olefins to provide an olefin feed stream for oligomerization. The oligomerizing catalyst can be restored to full activity. The regeneration process can be carried out continuously.
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