New Cyclic and Isohydric Method for Obtaining Potassium Nitrate
A. V. ELSUKOV and S. A. MAZUNIN
Perm State National Research University, Ul. Bukirev, 15, Perm 614600 (Russia)
Keywords: многокомпонентные водно-солевые системы, фазовые равновесия, циклический и изогидрический способ получения солей, нитрат калия, multicomponent water-salt systems, phase equilibria, cyclic and isohydric method to obtain salts, potassium nitrate
Abstract
A novel approach to planning and visualization of the cyclic and isohydric method for obtaining potassium nitrate is considered. The approach is based on the use of the data on phase equilibria in a quaternary mutual water-salt system K+, Na+//Cl−, at different temperatures. A key to process visualization ios the joint plotting of the diagram of state and its isohydric sections corresponding to the compositions of reference points. Experimental material balances are presented for this process carried out using retour of sodium chloride and without it. It is demonstrated that the introduction of retour allows one to decrease the losses of return solution at the stage of sodium chloride isolation, and to use sylvinite as the initial raw material for the process.
|
