Influence of the molar ratio of basic materials and temperature on production of potassium dihydrophosphate

Abstract

In this paper an interaction between potassium chloride and ammonium dihydrophosphate in water solutions at 20 and 40 °C temperature was studied in order to obtain non-chlorine fertilizers. After the analysis of the composition of liquid and solid phases in the balance state, it was determined that the composition of both phases depends more on the molar ratio of the starting substances and less depends on temperature. Components of the solid phase were identified by these analysis methods: X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The highest amount of potassium dihydrophosphate in the solid phase was obtained when the molar ratio of potassium chloride and ammonium dihydrophosphate is equal to 0.8 : 0.2.