Method of separating high-boiling or non-volatile materials

US4110370A · kind A · utility

Assignee

• BASF SE

Inventors

• Heinz Engelbach
• Richard Krabetz · Tauberbischofsheim, DE
• Gerd Duembgen · Schifferstadt, DE
• Carl-Heinz Willersinn · Ludwigshafen, DE
• Walter Frey
• Ulrich Lebert · Hettenleidelheim, DE
• Fritz Thiessen · Ludwigshafen, DE

Key dates

• Filing date: Oct 7, 1975
• Grant date: Aug 29, 1978
• Expiry date: Oct 7, 1995

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/22
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In the oxidation of propylene and/or acrolein, high-boiling or non-volatile byproducts are separated from the solvents used for absorbing the acrylic acid by treating the said solvents laden with byproducts with the hot reaction gases in such amounts that the major portion of the solvents evaporates, the residual solvent containing a high percentage of said byproducts then being discarded or worked up.