The distillation is based on a packed tower where the glycerine is distilled, fractionated to separate both heavy and light boiling impurities and condensed.
Yellowish glycerine is condensed in a separate scrubber. Deodorisation can be supplied according to the material being processed. Refining is continuous on three in line bleachers. In case of spent lyes or bio-diesel glycerine a salt squeezing section is added.