Patent ID: 6284930
Filing Date: 2001-09-04
Classification: C07C

Abstract:
A process for the preparation of 3-hydroxypropanal by hydration of acrolein in the presence of an ion exchanger, wherein acrolein and water are reacted in a weight ratio of 1:2 to 1:20, at 30.degree. C. to 120.degree. C. and at a pressure in the range of 1 to 20 bar, using a chelate-forming ion exchanger which contains, bound to a polymer matrix of a polymeric resin, anchor groups of the general formula ##STR2##whereinZ is H, C.sub.1 -C.sub.6 alkyl, --(CH.sub.2 --CH(CH.sub.3)--Y' or --(CH.sub.2).sub.o --Y',Y and Y', which are the same or different, are --COOH, --OH, pyridyl or --P(O)(OH).sub.2, wherein the acidic functional groups may be present, in part, in the form of their salts with alkali, alkali earth or earth metals,m is 0, 1, 2 or 3,n is 1, 2 or 3 for Y.dbd.--COOH, pyridyl or --P(O)(OH).sub.2 ; 2 or 3 for Y.dbd.--OH,o is 1, 2 or 3 for Y'--COOH, pyridyl or --P(O)(OH).sub.2 ; 0, 2 or 3 for Y'.dbd.--OH, said process comprising adding a carboxylic acid to the reaction mixture.