Dissociation of Propylene Glycol
26 g of propylene glycol (0.34 mol) from bp. 96-98° mm shown at 100° under 21 mm pressure and the propylene oxide and two volumes of water were
slowly passed through a heated at 500° and filled with pumice combustion tube. The experiment took 2 hours and 45 minutes. There was a no charring.
The total amount of gas was 3 liters. 20.8 cc of distillate were obtained, of which 13.1 cc of distilled over when heated on a water bath between 52°
and 75°. The volatile oil in 30 cc of distilled water and dissolved again, was 11.5 cc of oil bp. 22-75° the same consisted only of Propanal wet,
completely free of acetone, as can be seen from the following. [There was more but I gave up here] |