Rectificative separation of fluids comprising (meth) acrylic monomers

US7351310B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Joachim Thiel · Neustadt, DE
• Albrecht Dams · Monsheim, DE
• Juergen Schroeder · Ludwigshafen, DE

Key dates

• Filing date: Sep 10, 2003
• Grant date: Apr 1, 2008
• Expiry date: Jun 21, 2024

Classification

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

Abstract

A process for rectificatively separating fluids including (meth)acrylic monomers in a rectification column by directly cooling the vapor including (meth)acrylic monomers rising to the top of the rectification column to form top condensate including (meth)acrylic monomers, the condensation space at the top of the column being separated from the region of the rectification column containing the separating internals only by at least one chimney tray from which the top condensate formed is removed from the rectification column, which includes effecting the direct cooling of the vapor in the condensation space in at least two spray zones which are spatially successive and are flowed through by vapor by spraying supercooled top condensate including added polymerization inhibitor, and the temperature of the sprayed supercooled top condensate becoming lower from spray zone to spray zone in the flown direction of the vapor.