Process for preparing acrylic acid using an aluminum-free zeolitic material

US9446390B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Andrei-Nicolae Parvulescu · Ludwigshafen am Rhein, DE
• Armin LANGE DE OLIVEIRA · Heidelberg, DE
• Michael Lejkowski · Neckargemünd, DE
• Nicolai Tonio Woerz · Darmstadt, DE
• Marco Hartmann · Jockgrim, DE
• Kazuhiko Amakawa · Kure, JP
• Michael Hugo GOEBEL · Mannheim, DE
• Ulrich Mueller · Hamburg, DE
• Mathias Feyen · Ludwigshafen, DE
• Yong Liu · Dalian, CN

Key dates

• Filing date: May 28, 2015
• Grant date: Sep 20, 2016
• Expiry date: May 28, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/353
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing acrylic acid comprising (i) providing a stream comprising a formaldehyde source and acetic acid and (ii) contacting this stream with an aldol condensation catalyst comprising a zeolitic material, wherein the framework structure of the zeolitic material in (ii) includes Si and O, and has a molar Al:Si ratio of 0:1 to 0.001:1, and wherein the framework structure of the zeolitic material in (ii), in addition to Si and any Al, comprises one or more elements selected from the group consisting of tetravalent elements Y other than Si and trivalent elements X other than Al.