Glycerol distillation process
 An improved process for purification of glycerol obtained from natural sources comprising alkalizing a glycerol-containing crude mixture in the presence of air for oxidation, evaporating the mixture in a thin-layer evaporator with redistillation of the residue, rectification and reevaporation in a packed column characterized by low-pressure-loss plates with a falling-film evaporator designed for internal and external partial condensation and to separate off unwanted constituents of the mixture, bleaching the product with activated carbon and separating the bleach in known manner. 
Henkel Kommanditgesellschaft auf Aktien
B B Y C
B01D B01D Y10S C07C
inventional inventional additional inventional
Helmut Otto Wilhelm Juergen Rolf Lutz
Meyer Michel Johannisbauer Plachenka Brockmann Jeromin