Upgrading shale oil by a combination process

US4623444A · kind A · utility

Assignee

• Occidental Oil Shale, Inc. · US

Inventors

• Stanley C. Che · Los Alamitos, US
• Ajay Madhav Madgavkar · Irvine, US

Key dates

• Filing date: Jun 27, 1985
• Grant date: Nov 18, 1986
• Expiry date: Jun 27, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G53/16
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A method for reducing the nitrogen content of shale oil is disclosed. The method comprises distilling shale oil to form a distillate containing lighter shale oil compounds and a residue containing heavier compounds. Nitrogen-containing compounds are extracted from the distillate to form a first nitrogen-lean raffinate and a first nitrogen-rich extract. Nitrogen-containing compounds are also extracted from the residue to form a second nitrogen-lean raffinate and a second nitrogen-rich extract. The second nitrogen-lean raffinate is hydro-treated to further reduce its nitrogen content.