Title:
PRODUCTION OF 1,3-PROPANEDIOL
Document Type and Number:
Japanese Patent JP3466228
Kind Code:
B2
Abstract:
PURPOSE: To obtain the compd. of the subject with little residual carbonyl content by subjecting 3-hydroxypropionaldehyde in an aq. soln. to catalytic hydrogenation under specified conditions in the presence of a fixed-bed hydrogenation catalyst.
CONSTITUTION: When a 3-hydroxypropionaldehyde in an aq. soln. is subjected to catalytic hydrogenation in the presence of a fixed-bed or suspension hydrogenation catalyst under conditions of 5 to 300 bar hydrogen pressure, pH 2.5 to 6.5 and 30 to 180°C, hydrogenation is carried out at 30 to 80°C (preferably 40 to 60°C) to obtain 50 to 95% (preferably 50 to 80%) HPA conversion rate and further at 100 to 180°C (preferably 110 to 150°C) to obtain substantially 100% HPA conversion rate. Thus, the objective compd. having <500 ppm residual carbonyl content is obtd.
Inventors:
Thomas hearts
Norbert vegant
Dietrich Arunz
Norbert vegant
Dietrich Arunz
Application Number:
JP13023593A
Publication Date:
November 10, 2003
Filing Date:
June 01, 1993
Export Citation:
Assignee:
E.I.DU PONT DE NEMOURS AND COMPANY
International Classes:
B01J23/46; B01J23/755; B01J25/02; C07B61/00; C07C29/14; C07C29/141; C07C31/20; B01J23/42; (IPC1-7): C07C31/20; B01J23/42; B01J23/46; B01J23/755; B01J25/02; C07C29/14
Domestic Patent References:
| JP3135932A | ||||
| JP51138607A |
Attorney, Agent or Firm:
Yoshikazu Tani (2 outside)
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