Abstract: This invention relates to a method and a device for purifying and/or separating preferably high melting organic raw products or compound mixtures containing, in particular, high melting and/or degradable sterols, by layer crystallization on first heat exchanger surfaces. The raw product is received in a solvent or solvent mixture, and then brought into contact with heat exchanger surfaces. The desired product crystallizes on the heat exchanger surfaces by slow cooling. Solvent evaporating during the crystallization or sweating process is condensed and returned to the mixture.

Abstract: This invention relates to a method and a device for purifying and/or separating preferably high melting organic raw products or compound mixtures containing, in particular, high melting and/or degradable sterols, by layer crystallisation on first heat exchanger surfaces. The raw product is received in a solvent or solvent mixture, and then brought into contact with heat exchanger surfaces. The desired product crystallises on the heat exchanger surfaces by slow cooling. Solvent evaporating during the crystallisation or sweating process is condensed and returned to the mixture.

Abstract: In a method for obtaining anthracene and carbazole and their sequential products from the anthracene oil resulting during coal tar distillation or its purification products, anthracene oil or the purification product crude anthracene is converted into a melt without adding solvent, the melt is cooled under the crystallization point of carbazole and anthracene, the crystal product obtained is separated from the liquid phase, and the crystal product is distilled to obtain pure anthracene and pure carbazole.