Process for the preparation of 1,3-propanediol

Details Process for the preparation of 1,3-propanediol Process for the preparation of 1,3-propanediol

C - Chemistry, Metallurgy

07

C

C07C 29/141 (2006.01) C07C 31/20 (2006.01) C07C 45/64 (2006.01) C07C 47/19 (2006.01)

Patent

CA 2056681

Process for the hydration of acrolein in the presence of a chelate forming ion exchange resin based on polystyrene/divinyl benzene as catalyst, followed by hydrogenation of the reaction mixture which has been freed from unreacted acrolein and contains 3-hydroxypropionaldehyde. By using chelate forming ion exchangers having anchoring groups corresponding to the following general formula: Image wherein Z = H, C1-C6-alkyl, -CH2-CH(CH3)-Y' or -(CH2)o-Y' and Y and/or Y' = -COOH, -OH, pyridyl or -P(O) (CH2OH)OH, hydration proceeds at lower temperatures with higher volume/time yields and in particular higher selectivity than hydration carried out with previously known ion exchangers. Resins containing methylene iminodiacetic acid anchoring groups in the H form or partially doped with alkali metal, alkaline earth metal or earth metal ions are particularly suitable.

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