Fractional condensation of a product gas mixture containing acrylic acid

US6679939B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Joachim Thiel · Neustadt, DE
• Jürgen Schröder · Ludwigshafen, DE
• Gerhard Nestler · Ludwigshafen, DE

Key dates

• Filing date: Aug 20, 2001
• Grant date: Jan 20, 2004
• Expiry date: Aug 20, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/50
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a process for the fractional condensation of an acrylic acid-containing product gas mixture of a gas-phase partial oxidation of C3 precursors of acrylic acid with molecular oxygen under heterogeneous catalysis, the separation column used contains both dual-flow trays and hydraulically sealed cross-flow trays as baffles having separation activity.