STUDIES CONCERNING THE PENTAERYTHRITOL AN D CALCIUM FORMIATE SOLUTIONS CONCENTRATION

The solubility diagrams at different temperatures (5-degrees-C, 21-deg rees-C, 50-degrees-C and 96-degrees-C), for the ternary system: water - pentaerythritol - calcium formate, experimentally established, are p resented. It is also related the way in which these diagrams are used for reasonable carrying out the separation through concentration and c rystallization from aqueous solutions obtained in a technological proc ess. A climbing film evaporating plant for the aqueous pentaerythritol and calcium formate solutions concentration was constructed and teste d. On the basis of the determined solubility diagrams and of experimen tal result, the operating conditions for evaporating pentaerythritol s olutions of different concentrations were proposed.