Hydrocarbon compositions and methods for producing the same, methods for producing lower olefin compositions, methods for producing polyolefin polymers, and methods for determining hydrocarbon compositions

A hydrogenation and dehydration process using separate catalysts effectively reduces oxygen-containing compounds in pyrolysis oils from waste plastics, addressing catalyst poisoning and corrosion issues while producing high-quality lower olefins.

JP7882423B2Active Publication Date: 2026-06-30MITSUBISHI CHEM CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
MITSUBISHI CHEM CORP
Filing Date
2025-02-21
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing methods for refining plastic decomposition oils fail to sufficiently reduce oxygen-containing compounds, leading to catalyst poisoning and equipment corrosion, and are not economically viable due to the need for diesel fuel dilution.

Method used

A method involving a hydrogenation and dehydration process using separate hydrogenation and dehydration catalysts to reduce oxygen-containing compounds in pyrolysis oils from waste plastics, achieving a content of 900 ppm or less by mass of oxygen atoms.

Benefits of technology

The process effectively reduces oxygen-containing compounds, preventing catalyst poisoning and equipment corrosion, and allows for the production of high-quality lower olefins with reduced methanol content.

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Abstract

Provided are: a hydrocarbon composition; a production method therefor; a method for producing a lower-olefin composition; a method for producing a polyolefin-based polymer; and a method for assessing a hydrocarbon composition. The hydrocarbon composition includes a product of decomposition of a chemically recycled feedstock, and has an oxygen-containing compound content as determined by elemental analysis of 900 mass ppm or less in terms of oxygen atom amount. The chemically recycled feedstock comprises a polyolefin-based polymer and an oxygen-containing compound.
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