Preparation of (meth)acrylic acid

US7012157B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Frieder Borgmeier · Mannheim, DE
• Frank Rosowski · Mannheim, DE
• Hans Martan · Bischofswerda, DE
• Klaus Joachim Müller-Engel · Blankenloch, DE

Key dates

• Filing date: Sep 7, 2004
• Grant date: Mar 14, 2006
• Expiry date: Sep 7, 2024

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2523/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for preparing (meth)acrylic acid, in which a saturated hydrocarbon precursor compound is conducted through a catalyst charge which consists of two spatially successive catalyst beds I, II in the flow direction of the reaction mixture, each of which contains different catalysts and has different reaction-selectivity behavior.