Recovery of light olefins from dry hydrocarbon gas from refinery and petrochemical production processes for production of alkylate

US11905241B2 · kind B2 · utility

Assignee

• Kellogg Brown & Root LLC · US

Inventors

• Gautham Krishnaiah · Ellicott City, US
• Brian H. Heasley · Wake Forest, US
• John L. Webb · Richmond, US
• Rahul Radhakrishna Pillai · Bengaluru, IN
• Vijender K. Verma · Sugar Land, US
• Narinder Singh Duggal · Sindhar, IN

Key dates

• Filing date: Dec 22, 2020
• Grant date: Feb 20, 2024
• Expiry date: Dec 22, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2400/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Methods and systems for treating an olefin-containing stream are disclosed. The disclosed methods and systems are particularly suitable for treating an off-gas stream in a refining or petrochemical process, such as from a fluid catalytic cracker (FCC), coker, steam cracker, and the like. The stream is treated in an absorber column to reject lighter stream components and to absorb ethylene and/or propylene into a solvent. The solvent is typically isobutane. The enriched solvent stream from the absorber column is fed to an alkylation reactor, which reacts the dissolved olefin with the isobutane solvent to produce an alkylate product.