VERFAHREN ZUM REINIGEN VON GLYCERINWASSER

摘要

In the method described, the glycerin water (fresh water) produced in the high-pressure decomposition of natural fats and oils using steam to give fatty acids and glycerin is continuously purified. Using a plate-type phase separator, fatty-matter droplets with a diameter greater than 100 mu m are separated from the aqueous phase and fed back to the high-pressure decomposition stage. The aqueous phase pre-purified in this way is then passed as a cross-current flow over a filtration membrane, in particular a microfiltration membrane, and the concentrate fed back to the phase-separator input. This method enables large, industrial-scale quantities of glycerin water to be purified efficiently and particularly inexpensively on a continuous basis, even when the source of supply changes frequently.