Process for recovering solvents from solvent-containing hydrocarbon phases in hydrocarbon raffination systems

US4422923A · kind A · utility

Assignee

• Edeleanu Gesellschaft mbH

Inventors

• Gerhard Wirtz · Frankfurt am Main, DE
• Rainer Maxelon · Raunheim, DE

Key dates

• Filing date: Jan 19, 1981
• Grant date: Dec 27, 1983
• Expiry date: Jan 19, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G21/28
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Recovery of solvent from hydrocarbon oil extract fractions comprising solvent and oil is effected in at least three sequential flash vaporization stages wherein the pressure of the second vaporization stage is at the highest pressure level and the pressure of the third vaporization stage is at a pressure level intermediate the pressure level of the first and second vaporization stages.