Integrated production of biodesel and 1, 3- propanediol
How to convert glycerol has become a common problem which has to be resolved if considering large amount of biodiesel production. Integrated production of 1,3-propanediol (PDO) from glycerol could be a promising way to improve the profit of the whole process during biodiesel production.1,3-PDO is a valuable chemical material and especially it could be copolymerizes with terephthalic acid (or methyl ester) to form polytrimethylene terephthalate (PTT).
Our laboratory has proposed a novel flexible process for 1,3-PDO production from glycerol or glucose, and the demonstrations of 5m^3 and 50m^3 were finished. The purity of final product 1,3-PDO is as good as 99.92%. Some 1,3-PDO sample was tested for PTT polymerization by Chinese and Japanese companies. The results showed that the key characteristics of PTT polymerized with the 1, 3-PDO produced by biological route are even better than that by chemical route.