Conversion of waste plastic through pyrolysis to high value products like benzene and xylenes

US10975313B2 · 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: Apr 13, 2021
• Expiry date: Jan 16, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2400/30
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for producing benzene and xylenes comprising introducing hydrocarbon liquid stream to hydroprocessor to yield first gas stream and hydrocarbon product (C5+); optionally introducing hydrocarbon product to first aromatics separating unit to produce saturated hydrocarbons (C5+) and first aromatics stream (C6+); feeding hydrocarbon product and/or saturated hydrocarbons to reformer to produce reformer product, second gas stream, and hydrogen stream; introducing reformer product to second aromatics separating unit to produce a non-aromatics recycle stream and second aromatics stream comprising C6+ aromatics; recycling non-aromatics recycle stream to reformer; introducing first aromatics stream and/or second aromatics stream to third aromatics separating unit to produce first C6 aromatics (benzene), C7 aromatics (toluene), C8 aromatics (xylenes&ethylbenzene), C9 aromatics, C10 aromatics, and C11+ aromatics; introducing C7 aromatics, C9 aromatics, C10 aromatics, or combinations thereof to disproportionation and transalkylation unit to yield third aromatics stream (benzene and xylenes); and conveying C11+ aromatics to hydroprocessor.