Glycerine Plant

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 and re-evaporating the residue, in a packed column equipped with low-pressure-loss plates for falling-film partial condensation. The product is then treated with activated carbon, and the constituents of the mixture are separated in a known manner for internal and external bleaching to obtain refined glycerol.

 

Glycerol is formed during the transesterification, splitting or saponification of natural oils and fats, by saponification with alkali or by high pressure hydrolysis, depending on the saponification process, crude glycerol contains relatively large quantities of water, inorganic salts, low- molecular-weight organic compounds and also higher glycerol oligomers and polymers. 

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