Process for the preparation of 3-hydroxypropanal
AssigneeE.I. du Pont de Nemours and Company
InventorsThomas Haas, Liane Deusser, Torsten Hahm, Willi Hofen, Rudolf Vanheertum
Life of this patent
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Abstract
3-Hydroxypropanal is prepared by reacting acrolein with water under pressure and in the presence of an ion exchange resin while adding a carboxylic acid to the reaction mixture.
Claims26
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° C. to 120° 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
- wherein
- Z is H, C1-C6 alkyl, —(CH2—CH(CH3)—Y′ or —(CH2)o—Y′,
- Y and Y′, which are the same or different, are —COOH, —OH, pyridyl or —P(O)(OH)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═—COOH, pyridyl or —P(O)(OH)2;
- 2 or 3 for Y═—OH,
- o is 1, 2 or 3 for Y′—COOH, pyridyl or —P(O)(OH)2;
- 0, 2 or 3 for Y′═—OH, said process comprising adding a carboxylic acid to the reaction mixture.
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° C. to 120° C. and at a pressure in the range of 1 to 20 bar, using a chelate-forming ion exchanger, wherein the chelate-forming ion exchanger contains, bound to a polymer matrix of a polymeric resin, anchor groups of the general formula
- wherein
- Z is H, C1-C6 alkyl, —(CH2—CH(CH3)—Y′ or —(CH2)o—Y′,
- Y and Y′, which are the same or different, are —COOH, —OH, pyridyl or —P(O)(OH)2, wherein the acidic functional groups may be present, in part, in the form of their salts with alkali, alkaline earth or earth metals,
- m is 0, 1, 2 or 3,
- n is 1, 2 or 3 for Y═—COOH, pyridyl or —P(O)(OH)2;
- 2 or 3 for Y═—OH,
- o is 1, 2 or 3 for Y′—COOH, pyridyl or —P(O)(OH)2;
- 0, 2 or 3 for Y′═—OH, further comprising adding an additive consisting essentially of a carboxylic acid.
Dependencies are inferred from the claim text.