Coal hydrogenation process with integrated refining stage

US4602992A · kind A · utility

Assignee

• Ruhrkohle AG

Inventors

• Josef Langhoff · Dinslaken, DE
• Eckard Wolowski · Mülheim, DE
• Frank Mirtsch · Berlin, DE

Key dates

• Filing date: Sep 20, 1985
• Grant date: Jul 29, 1986
• Expiry date: Sep 20, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G1/002
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

In accordance with the invention, during hydrogenation by means of sump phase hydrogenation followed by gas-phase hydrogenation, the high boiling fractions are separated from the lower boiling vapor fractions, after leaving the hot precipitation head, by partial condensation in an intermediate precipitator with the result that the gas-phase reactor has a better service life and optimum reaction conditions can be provided. The improved process results in an improved quality of solvent for the sump phase hydrogenation.