Conversion of waste plastic to propylene and cumene

US10858593B2 · kind B2 · utility

Assignee

• SABIC GLOBAL TECHNOLOGIES B.V. · NL

Inventors

• Krishna Kumar Ramamurthy · Bengaluru, IN
• Ravichander Narayanaswamy · Kanchinakote, IN
• Venkata Ramanarayanan Ganapathy Bhotla · Bengaluru, IN
• Alexander Stanislaus · Kanchinakote, IN
• Santosh Ganji · Bengaluru, IN

Key dates

• Filing date: Jan 3, 2018
• Grant date: Dec 8, 2020
• Expiry date: Jan 28, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C15/085
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for producing cumene comprising converting plastics to hydrocarbon liquid and pyrolysis gas; feeding hydrocarbon liquid to hydroprocessor to yield hydrocarbon product and first gas stream; feeding hydrocarbon product to reforming unit to produce reforming product, second gas stream, and hydrogen; separating reforming product into non-aromatics recycle stream and second aromatics stream (C6+ aromatics); recycling non-aromatics recycle stream to reforming unit; separating second aromatics stream into benzene, C7, C8, C9, C10, and C11+ aromatics; contacting C7, C9, and/or C10 aromatics with a disproportionation&transalkylation catalyst/H2 to yield benzene&xylenes; conveying C11+ aromatics to hydroprocessor; introducing pyrolysis gas, first and/or second gas stream to first separator to produce first propylene stream, first C2&C4 unsaturated stream, and saturated gas (H2 and C1-4 saturated hydrocarbons); introducing first C2&C4 unsaturated stream to metathesis reactor to produce second propylene stream; and feeding benzene, and first and/or second propylene stream to alkylation unit to produce cumene.