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2008 | 10 | 4 | 25-27

Article title

The influence of urea on the K2CO3 and NH4VO3 solubility in the K2CO3 + NH4VO3 + H2O system


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The influence of urea on the vanadium(V) and potassium ion concentrations in the K2CO3 + NH4VO3 + H2O system was determined in the temperature range of 293 K to 313 K. Additionally, the solution density dependence versus the urea concentration was presented. These data are essential for the assessment of optimum operating conditions for the new production process of potassium carbonate.









Physical description


1 - 1 - 2008
7 - 1 - 2009


  • Faculty of Chemistry, Nicolaus Copernicus University, ul. Gagarina 7, 87-100 Toruń, Poland


  • Trypuć, M., Stefanowicz, D., Kiełkowska, U., Łyjak, G. & Torski, Z. (2004). PL Patent No. 186 717.
  • Trypuć, M., Torski, Z. & Kiełkowska, U. (2001). Experimental determination of the optimum conditions of KVO3 synthesis based on KCl and V2O5 in the presence of steam. Ind. Eng. Chem. Res. 4, 1022-1025. DOI: 10.1021/ie000588i.[Crossref]
  • Trypuć, M., Białowicz, K. & Mazurek K. (2004). Investigations on the synthesis of KVO3 and Cl2 from KCl and V2O5 in presence of oxygen. Chem. Eng. Science., 59/6, 1241-1246. DOI:10.1016/j.ces.2003.12.017.[Crossref]
  • Trypuć, M., Kiełkowska, U., Białowicz, K. & Mazurek, K. (2004). Solubility of Ammonium Metavanadate in Potassium Bicarbonate Water Solution. Pol. J. Chem. Tech. 2, 53-55.
  • Trypuć, M., Białowicz, K. & Mazurek, K. (2004). Solubility of KVO3 in water + ammonia solutions from 293 to 323 K. Ind. Eng. Chem. Res. 43, 8403-8406. DOI: 10.1021/ie040128f.[Crossref]
  • Pieniążek, T. (1965). The application of polythermodynamic crystallization method to obtaining potassium sulphate according to the reaction K2Cl2 + MgSO4 = K2SO4 + MgCl2 without/with w presence of urea. Chemia Stosowana. 1A, 51-55.
  • Pieniążek, T. (1965). Crystallization in the system K2Cl2-MgSO4-K2SO4-MgCl2-H2O in the presence of urea and the isotherms of KCl saturated solutions in the temperature 15 and 25°C. Chemia Stosowana. 2A, 177-182.
  • Trypuć, M. (1974). The equilibrium investigations in the systems NaCl - NH3 - CO2 - H2O, NaNO3 - NH3 - CO2 - H2O, KCl - NH3 - CO2 - H2O, KNO3 - NH3 - CO2 - H2O in the presence of urea, in the triple point P1, Toruń, Poland: UMK.
  • Trypuć, M., Mazurek, K. & Białowiczm K. (2002). Solubility in the NH4VO3 + CO(NH2)2 + H2O system from 293 K to 323 K, Fluid Phase Equilibria. 203, 285-293. DOI: 10.1016/S0378-3812(02)00189-9.[Crossref]
  • Trypuć, M., Mazurek, K. & Białowicz, K. (2003). Investigations on the solubility in the NaVO3 + CO(NH2)2 + H2O system from 293 to 323 K, Fluid Phase Equlibria. 211, 151-159. DOI: 10.1016/S0378-3812(03)00151-1.[Crossref]
  • Trypuć, M., Mazurek, K. & Białowicz, K. (2002). Solubility in the KVO3 + CO(NH2)2 + H2O system from 293 to 323 K, Pol. J. Appl. Chem. 1, 47-55.
  • Furman, N. H. (1962). Standard Method of Chemical Analysis. Princeton, NJ, USA: Van Nostrand Co.
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  • Williams, W. J. (1979). Handbook of Anion Determination. London, UK: Butterworth.
  • Houben, J. & Weil, Th. (1974). Methoden der organischen Chemie. Stuttgart: Georg Thieme Verlag.

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