<abstract xmlns="http://www.w3.org/1999/xhtml">Seeking to obtain bulk (NPK – nitrogen, phosphorus, potassium), chlorine-free fertilizers, the influence of interaction between potassium chloride and ammonium dihydrogen phosphate in aqueous solutions at temperature of 20, 40, 60 and 80°C has been investigated. Components of the solid phase have been identified by methods of chemical and instrumental analysis: radiography (X – ray), infra – red molecular absorption spectroscopy (IR) and scanning electron microscopy (SEM). It has been observed that the largest amount of solid state potassium dihydrogen phosphate was obtained at 60–80°C, when the potassium chloride and ammonium dihydrogen phosphate molar ratio is equal 0.8:0.2. Changing the molar ratio of 0.5:0.5 to 0.8:0.2, and with increasing temperature, various shaped crystals have developed in the remaining aqueous solutions with a morphology shifting from sharp needles to tetragonal prism.</abstract>

Seeking to obtain bulk (NPK – nitrogen, phosphorus, potassium), chlorine-free fertilizers, the influence of interaction between potassium chloride and ammonium dihydrogen phosphate in aqueous solutions at temperature of 20, 40, 60 and 80°C has been investigated. Components of the solid phase have been identified by methods of chemical and instrumental analysis: radiography (X – ray), infra – red molecular absorption spectroscopy (IR) and scanning electron microscopy (SEM). It has been observed that the largest amount of solid state potassium dihydrogen phosphate was obtained at 60–80°C, when the potassium chloride and ammonium dihydrogen phosphate molar ratio is equal 0.8:0.2. Changing the molar ratio of 0.5:0.5 to 0.8:0.2, and with increasing temperature, various shaped crystals have developed in the remaining aqueous solutions with a morphology shifting from sharp needles to tetragonal prism.

KH2PO4 crystallisation from potassium chloride and ammonium dihydrogen phosphate

Kaunas University of Technology, Department of Physical and Inorganic Chemistry, Radvilėnų Rd. 19, LT-50254 Kaunas, Lithuania

Polish Journal of Chemical Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

KHPO crystallisation from potassium chloride and ammonium dihydrogen phosphate

Seeking to obtain bulk (NPK – nitrogen, phosphorus, potassium), chlorine-free fertilizers, the influence of interaction between potassium chloride and ammonium...

KH₂PO₄ crystallisation from potassium chloride and ammonium dihydrogen phosphate

Published Online: Apr 04, 2016

Page range: 1 - 8

DOI: https://doi.org/10.1515/pjct-2016-0001

Keywords
potassium dihydrophosphate, ammonium dihydrophosphate, molar ratio, crystallization, crystal

© 2016 Kristina Jančaitienė et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

KH2PO4 crystallisation from potassium chloride and ammonium dihydrogen phosphate

Published Online: Apr 04, 2016

Page range: 1 - 8

DOI: https://doi.org/10.1515/pjct-2016-0001

Keywordspotassium dihydrophosphate, ammonium dihydrophosphate, molar ratio, crystallization, crystal

© 2016 Kristina Jančaitienė et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

KH₂PO₄ crystallisation from potassium chloride and ammonium dihydrogen phosphate

Keywords
potassium dihydrophosphate, ammonium dihydrophosphate, molar ratio, crystallization, crystal