Preparation of (METH) acrylic acid and (METH) acrylic esters

US7119224B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Juergen Schroeder · Ludwigshafen, DE
• Frank Hoefer · Bad Dürkheim, DE
• Sylke Haremza · Neckargemünd, DE
• Gerhard Wagenblast · Wachenheim, DE
• Volker Schliephake · Schifferstadt, DE
• Ulrich Jaeger · Münstermaifeld, DE
• Harald Keller · Ludwigshafen, DE
• Cedric Dieleman · Scheibenhard, FR

Key dates

• Filing date: Sep 2, 2003
• Grant date: Oct 10, 2006
• Expiry date: Sep 2, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/62
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing and/or working up mixtures by (meth)acrylic acid and/or (meth)acrylic ester in the presence of at least one polymerization inhibitor and at least one oxygenous gas, which comprises metering in at least part of the oxygenous gas at an exit rate of at least 50 mm/s.