Process for the two-stage separation of ammonia

US4149857A · kind A · utility

Assignee

• VEB Leuna Werke Walter Ulbricht · DE

Inventors

• Wilfried Volke · Magdeburg, DE
• Hans Forster · Magdeburg, DE
• Egon Wolters · Magdeburg, DE
• Rainer Paulusch · Magdeburg, DE
• Horst Radon · Markranstädt, DE
• Karsten Kalb · Hersbruck, DE
• Jurgen Franke · Hersbruck, DE
• Hans-Jurgen Kohl · Halle (Saale), DE
• Karl-Lothar Rumenapp · Halle, BE

Key dates

• Filing date: Mar 6, 1978
• Grant date: Apr 17, 1979
• Expiry date: Mar 6, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01C1/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the separation of condensable and absorbable gas components having a critical temperature above 30.degree. C. from a mixture with inert gases, being absorbable at most in a little measure and the proportions of the components of said mixture varying widely, by two-stage absorption and simultaneous compression of the cleaned gas and the separated components to different pressures, in which the varying composition of the gas mixture to be separated is equalized in a first absorption stage so that at least temporarily part of the absorbable components of the mixture is absorbed. The remaining gas mixture is compressed and then introduced into a second absorption stage, wherein are obtained an inert gas mixture largely free from absorbable components and a solution rich in absorbable components, from which the absorbable components of the gas mixture are separated through subsequent multi-stage thermal desorption, the absorbent being fed back into the process.