| abstract |
The invention relates to a process for the preparation of optically pure propane-1,2-diol comprising the process steps a. Hydrogenation of lactides, wherein a metal-catalyzed heterogeneous catalysis is carried out in the presence of hydrogen, wherein a crude product containing propane-1,2-diol, is prepared, and b. dynamic kinetic resolution, wherein in a range of ≥ 99% ee optically pure propane-1,2-diol is produced. |