Method for the production of 1,3-propandiol

US5171898A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Dietrich Arntz · Oberursel, DE
• Norbert Wiegand · Rheinfelden (Baden), DE

Key dates

• Filing date: Nov 27, 1991
• Grant date: Dec 15, 1992
• Expiry date: Nov 27, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/64
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The hydration of acrolein in the presence of a chelate-forming ion exchange resin based on polystyrene/divinyl benzene as catalyst and on the subsequent hydrogenation of the reaction mixture freed of the non-reacted acrolein and containing 3-hydroxypropionaldehyde is disclosed. As a result of using chelate-forming ion exchangers with anchor groups of the formula ##STR1## in which Z=H, C.sub.1 -C.sub.6 -alkyl, --CH.sub.2 --CH(CH.sub.3)--Y' or --(CH.sub.2).sub.o --Y' and Y and/or Y'=--COOH, --OH, pyridyl or --P(O)(CH.sub.2 OH)OH, the hydration occurs at lower temperatures with a greater space-time yield and especially a greater selectivity than when using previously known ion exchangers. Resins with methylene imino diacetic acid anchor groups in the H form or partially doped with alkali-, alkaline-earth or earth-metal ions are especially suitable.