Process for producing acrylic acid

US8530700B2 · kind B2 · utility

Assignee

• Arkema Inc. · US

Inventors

• Fungau Ho · Charleston, US
• Olan S. Fruchey · Port Aransas, US
• Roger L. Roundy · Hurricane, US
• William G. Etzkorn · Cross Lanes, US
• Christopher T. Reeves · Hurricane, US
• Mahmood N. A. Jawaid · Cross Lanes, US
• Edmund J. Yang · Houston, US
• Dennis W. Jewell · Angleton, US

Key dates

• Filing date: May 11, 2012
• Grant date: Sep 10, 2013
• Expiry date: May 11, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/44
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The process for the distillation of a gas mixture comprising (meth)acrylic acid obtained from the gas-phase oxidation of at least one (meth)acrylic acid precursors is improved through the use of coupled distillation columns. In a first column, the gaseous mixture is dehydrated while in a second column, the dehydrated gaseous mixture is distilled into product, overhead and bottoms streams.