Process for deasphalting residua by reactive recycle of high boiling material

US6652739B2 · kind B2 · utility

Assignee

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Mitchell Jacobson · West Orange, US
• Willibald Serrand · Buxheim, DE
• Norman H. Sweed · Princeton, US
• Hans-Jurgen Weiss · Oberursel, DE
• Ingo Dreher · Oberursel, DE
• Udo Zentner · Griesheim, DE
• Jorg Schmalfeld · Friedrichsdorf, DE

Key dates

• Filing date: Oct 29, 2002
• Grant date: Nov 25, 2003
• Expiry date: Oct 29, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G31/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An improved process for deasphalting a residua feedstock by use of a short vapor residence time process unit comprised of a horizontal moving bed of fluidized and/or stirred hot particles. The vapor phase product stream from said process unit is passed to a soaker drum where a high boiling fraction is separated and recycled to the process unit after undergoing reactions causing molecular weight growth. This reactive recycle using the soaker drum results in substantially improved qualities of the liquid products compared with what is achieved by once-through residua deasphalting process alternatives.