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1 Polish Journal of Chemical Technology

1 1999

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Solubility investigations in the NaVO3 + NH4HCO3 + NH4VO3 + NaHCO3 + H2O system

Trypuć M., Kiełkowska U.

Polish Journal of Chemical Technology

1999

Vol. 1, nr 1

40-44

Mutual salts solubility in the NaVO3 + NH4HCO3 + NH4VO3 + NaHCO3 + H2O system at temperature 303 K and the carbonization degree (R) of 90% has been studied. On the basis of the compiled data, a solubility polytherm section in the oblique projection on plane according to Janecke has been plotted. It has been found out that ammonium metavanadate is a sparingly soluble salt, NH4VO3 and NaHCO3 compose the stable pair of salts, whereas the triple points P1, P2 are represented by solutions convergently saturated. A thorough knowledge of the solubility isotherm course for the reciprocal salt pairs system is essential for an elaboration of sodium carbonate production technology based on NaVO3 as an initial reactant.