Process and installation for converting plastics into pyrolytic oils

A continuous pyrolysis process with optimized energy input and catalyst use in a gravity column reactor addresses the challenge of maintaining oil quality in industrial plastic pyrolysis, achieving consistent production of high-quality pyrolytic oils.

FR3140090B1Active Publication Date: 2026-04-03VALOREGEN SAS
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Patent Information

Application Number
FR2022009818
Authority / Receiving Office
FR · FR
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-09-28
Publication Date
2026-04-03
Estimated Expiration
2042-09-28

AI Technical Summary

Technical Problem

Existing processes for producing pyrolytic oils from plastics on an industrial scale often suffer from transient regimes that compromise the quality of the oils, and there is a need for a continuous process that maintains consistent quality.

Method used

A continuous pyrolysis process involving preheating plastics to a specific temperature, followed by pyrolysis in a gravity column reactor with a permeable bed under anaerobic conditions, separating energy inputs to optimize cracking, and using a catalyst to enhance the reaction, while incorporating steps for degassing and filtration to maintain oil quality.

Benefits of technology

The process achieves consistent production of high-quality pyrolytic oils by optimizing energy input and reaction conditions, reducing contaminants, and ensuring continuous operation without quality degradation.

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Abstract

A process for converting plastics into pyrolytic oils, in which: - the plastics are continuously fed into a preheating reactor (3) to be mixed and preheated to a preheating temperature to obtain a paste-like mixture; - the paste-like mixture is continuously transferred to a pyrolysis reactor (5) to be heated to a pyrolysis temperature, under an anaerobic or inert atmosphere, to be converted into synthesis gases and a solid reaction product; - the synthesis gases, containing condensable and non-condensable gases, are collected at a first outlet (51) located above the permeable bed, and the solid reaction product is collected at a second outlet (52) located below the permeable bed; - the condensable gases from the synthesis gases are condensed into pyrolytic oils, which are then recovered. Abstract figure: Figure 1
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