Термодинамика химических реакций в технологии карбоната калия

Abstract

Methods of thermodynamic analysis showed dependence of Gibbs energy and equilibrium constants on temperature for the process of carbon dioxide hydration. Presented the most probable mechanism of the carbonization process with the formation of potassium bicarbonate immediately in crystalline form. Early reaction temperature detected for calcination of K₂CO₃ KHCO₃, which is 445,15 K (172 ºC) and interaction temperature of KHCO₃ with [(C₂H₅)₂NH₂]Cl and of K₂CO₃ with [(C₂H₅)₂NH₂]Cl, which are 339,15 K (66 ºC) and 293,15 K (20 ºC). Using respectively it was established that regeneration reaction of Dea from N,N-dietylammonium chloride calcium hydroxide was reversible and takes place at a substantial rate already at standard temperature of 298,15 K.