1Haas T,Yu D H, Sauer J,et al. A process for the produc- tion of 1,3 - propanediol [ P]. US:6232511,2001.
2Brossmerc, Amtz D. Process for the production of 1,3 - propanediol [ P]. US :6140543,2000.
3Haas T, Jaeger B. Two - stage process for the production of 1,3 -propanediol by catalytic hydrogenation of 3 - hydroxypropanal [ P ]. US : 6297408,2001.