1. A continuously operated process for the purification by distillation of the 1,2-propylene glycol formed as by-product in the synthesis of propylene oxide, wherein the mixture formed in the synthesis which contains the 1,2-propylene glycol is separated in a dividing wall column into low-, ...
The catalyst comprises a second metal selected from metals (titanium, zirconium, hafnium) the fourth group of the periodic table of the elements and iridium. Preferably, the second metal and iridium are deposited on activated carbon as support material. In a preferred aspect of the present ...