Method for the fractional condensation of a hot gas mixture containing acrylic acid or methacrylic acid and having a high proportion of non-condensable constituents

US6646161B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Bernd Eck · Viernheim, DE
• Otto Machhammer · Mannheim, DE
• Theo Proll · Bad Dürkheim, DE
• Volker Schliephake · Schifferstadt, DE
• Joachim Thiel · Neustadt, DE
• Klaus Bröllos · Seeheim-Jugenheim, DE

Key dates

• Filing date: Mar 13, 2000
• Grant date: Nov 11, 2003
• Expiry date: Mar 13, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/44
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for the fractional condensation of a gas mixture which, in addition to acrylic acid or methacrylic acid, also contains at least one further condensable component and additionally a high proportion of one or more noncondensable components, wherein the gas mixture is passed through a column having separatory internals and the condensable components are condensed by cooling.