Melvin J Hatch

Use of snake-cage polyelectrolytes for purifying glycerine

Amphoteric snake-cage resins were applied successfully to separate sodium chloride from glycerine. Good separations were obtained by the ion-retardation method at glycerine feed concentrations as high as 50% and at flow rates as fast as 1 gal. per square foot per minute in beds which were 3 ft. deep or less. Glycerine product was obtained at concentrations of 20–35%; glycerine loss was only 1% and removal of the sodium chloride 90% or more. Thus greater resin productivity and higher product concentration resulted that in comparative ion-exclusion experiments. As a results, the calculated capital investment was much less for an ion-retardation plant for purifying glycerine. The calculated operating costs were slightly less.