Recovery of glycerine from saline waters.

摘要

A process for recovery of glycerine from saline waters containing glycerine. The said process comprises the steps of evaporating the water to precipitate a major amount of any salts present, separating the liquid phase and diluting it with water to low viscosity, electrodialysing the diluted liquid phase to obtain, (1) a concentrate stream which is recycled to the evaporative step, and (2) a dilute stream which is subjected to fractionation distillation to obtain glycerine as on overhead fraction.