Gas absorption for separation of hydrocarbons

US5157202A · kind A · utility

Assignee

• Linde GmbH · DE

Inventors

• Heinz Bauer · Solingen, DE
• Hans Becker · Tönisvorst, DE
• Horst Weiss · Karlsruhe, DE

Key dates

• Filing date: Feb 22, 1991
• Grant date: Oct 20, 1992
• Expiry date: Feb 22, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C7/11
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

For recovery of low-boiling hydrocarbons by scrubbing, the crude gas mixture which contains low-boiling and high-boiling hydrocarbons, is treated with a scrubbing agent, by which the high-boiling components are scrubbed-out of the gas mixture. The loaded scrubbing agent, with the addition of liquid medium miscible with the scrubbing agent and which reduces the solubility for the scrubbed-out hydrocarbons, is regenerated and the completely regenerated scrubbing agent is recycled to the scrubbing. The regeneration is preferably divided into the following individual steps: PA0 (a) stripping of the loaded scrubbing agent, optionally with addition of medium, PA0 (b) addition of the liquid medium to partially regenerate scrubbing agent, decanting of the split phases, PA0 (c) stripping of the resultant decanted scrubbing agent/medium mixture, and PA0 (d) rectifying the scrubbing agent/medium mixture to separate the scrubbing agent.