Multi-stage hydrodesulfurization of cracked naphtha streams with a stacked bed reactor

US7297251B2 · kind B2 · utility

Assignee

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Edward S. Ellis · Berkeley Heights, US
• Richard A. Demmin · Highland Park, US
• John P. Greeley · Fairfax, US
• Gary B. McVicker · Califon, US
• Bruce R. Cook · Aurora, US
• Garland B. Brignac · Clinton, US
• Thomas R. Halbert · Baton Rouge, US

Key dates

• Filing date: Apr 28, 2003
• Grant date: Nov 20, 2007
• Expiry date: Jun 29, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2400/02
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for the selective hydrodesulfurization of naphtha streams containing a substantial amount of olefins and organically bound sulfur. The naphtha stream is selectively hydrodesulfurized by passing it through a first reaction zone containing a bed of a first hydrodesulfurization catalyst, then passing the resulting product stream through a second reaction zone containing a bed of a second hydrodesulfurization catalyst, which second hydrodesulfurization catalyst contains a lower level of catalytic metals than the first hydrodesulfurization catalyst.