Regeneration and rejuvenation of supported hydroprocessing catalysts

US7906447B2 · kind B2 · utility

Assignee

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Stephen J. McCarthy · Center Valley, US
• Chuansheng Bai · Phillipsburg, US
• William G. Borghard · Haddon Heights, US
• William E. Lewis · Baton Rouge, US

Key dates

• Filing date: Apr 3, 2009
• Grant date: Mar 15, 2011
• Expiry date: Apr 3, 2029

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J37/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Methods for rejuvenation of supported metallic catalysts comprised of a Group VIII metal, a Group VIB metal, making use of these metals, an organic complexing agent, and optionally an organic additive, are provided. The rejuvenation includes stripping and regeneration of a spent or partially spent catalyst, followed by impregnation with metals and at least one organic compound. The impregnated, regenerated catalysts are dried, calcined, and sulfided. The catalysts are used for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.