DOI: https://doi.org/10.15587/1729-4061.2016.74941

Technological and kinetic regularities of formation of suspension and its interaction with nitric acid while obtaining calcium nitrate

Mykola Oliinyk, Аnatoliy Shestozub, Vladimir Suprunchuk

Abstract


The results of studying the processes of forming calcium hydroxide transportation suspensions and their neutralization by nitrate acid with the development of energy­saving technologies of obtaining calcium nitrate were presented.

As a result of the research, the process of calcium oxide hydration in the calcium nitrate solution was substantiated and the mechanism of the suspension thickening was proposed.

The limit lime concentrations in the calcium nitrate solutions were established, the process of calcium oxide hydration in these solutions was theoretically calculated. The mechanism of thickening of the prepared suspension (suspension of Са(ОН)2 in Са(NO3)2 solution), based on the formation of hydrogen bonds due to the presence of oxygen with unfilled orbitals, was explored.

The degree of CaO conversion (kinetics of hydration) depending on the time and the intensity of mixing in 35 % solution of calcium nitrate, which increases from 0.67 to 0.89 o. n. with an increase in the intensity of mixing Re=1000÷13000 was established. The limit of the lime content for different concentrations of Са(NO3)2) was defined: for 15 %­solution of calcium nitrate, the highest possible lime concentration on conversion to СаО is 350 g/dm3, for 20 %­solution, it is 320 g/dm3, for 25 %­solution, it is 295 g/dm3, for 30 %­solution, it is 275 g/dm3, for 35 %­solution – 240 g/dm3 and for 40 %­solution, it is 200 g/dm3, respectively.

The results of the experimental research presented in the form of graphical dependencies and tabular data may be used for the improvement of existing and design of the new production facilities of calcium nitrate.

Keywords


calcium nitrate; lime; hydration; concentration; suspension; neutralization; nitrate acid; technology

References


Harty, M. A., Forrestal, P. J., Watson, C. J., McGeough, K. L., Carolan, R., Elliot, C. et. al. (2016). Reducing nitrous oxide emissions by changing N fertiliser use from calcium ammonium nitrate (CAN) to urea based formulations. Science of The Total Environment, 563-564, 576–586. doi: 10.1016/j.scitotenv.2016.04.120

Kuprin, O. V., Ishhenko, M. I., Savchenko, M. V., Kuprin, V. P (2009). Pat. 41672. Emul'sijna vybuhova rechovyna „UKRAI'NIT-PP-2B”. No u200902994; Zajavl. 30.03.2009; Opubl. 25.05.2009, Bjul. № 10, 2.

Murillo-Amador, B., Jones, H. G., Kaya, C., Aguilar, R. L., García-Hernández, J. L., Troyo-Diéguez, E. et. al. (2006). Effects of foliar application of calcium nitrate on growth and physiological attributes of cowpea (Vigna unguiculata L. Walp.) grown under salt stress. Environmental and Experimental Botany, 58 (1-3), 188–196. doi: 10.1016/j.envexpbot.2005.08.003

Morales, G. V., Quiroga, O. D. (2012). Modelado Cinético de la Disolución de Hidroboracita en Soluciones de Ácido Nítrico. Información tecnológica, 23 (5), 109–114. doi: 10.4067/s0718-07642012000500011

Gezerman, A. O. (2014). Effects of Calcium Lignosulfonate and Silicic Acid on Ammonium Nitrate Degradation. Journal of Chemistry, 2014, 1–6. doi: 10.1155/2014/426014

Obrestad T., Mutsaers P., Wallestad I. (2015). Pat. 220612 PL. Method for purification of solutions or calcium nitrate alloys and the solution/alloy of calcium nitrate. No 20090416, published: 30.11.2015.

Kumpoviс, S., Leakoviс, S. (2011). Redobrada procesnog kondenzata otplinjavanjem amonijaka u proizvodnji gnojiva KAN. Kemija u Industriji, 60 (10), 505–510.

Rodriguez, M., Zea, H. (2015). Evaluation of a synthesis process for the production of calcium nitrate liquid fertilizer. International Journal of ChemTech Research, 7 (4), 1960–1965.

Nawrocki, A., Olszewski, R. (2006). Pat. WO2006031139 A1. Method of calcium nitrate production. No PCT/PL2005/000054, declared: 22.08.2005; published: 23.03.2006.

Rabie D. R. H., Morris W. R., Eygelaar J. P. G. (2006). Pat. US7029504 B2. Method for producing calcium nitrate granules. No US 10/275,062, declared: 02.05.2001; published: 18.04.2006.


GOST Style Citations


1. Harty, M. A. Reducing nitrous oxide emissions by changing N fertiliser use from calcium ammonium nitrate (CAN) to urea based formulations [Text] / M. A. Harty, P. J. Forrestal, C. J. Watson, K. L. McGeough, R. Carolan, C. Elliot et. al. // Science of The Total Environment. – 2016. – Vol. 563-564. – P. 576–586. doi: 10.1016/j.scitotenv.2016.04.120

2. Pat. 41672. Emul'sijna vybuhova rechovyna „UKRAI'NIT-PP-2B” [Text] / Kuprin O. V., Ishhenko M. I., Savchenko M. V., Kuprin V. P. – No u200902994; Zajavl. 30.03.2009; Opubl. 25.05.2009, Bjul. № 10. – 2 p.

3. Murillo-Amador, B. Effects of foliar application of calcium nitrate on growth and physiological attributes of cowpea (Vigna unguiculata L. Walp.) grown under salt stress [Text] / B. Murillo-Amador, H. G. Jones, C. Kaya, R. L. Aguilar, J. L. García-Hernández, E. Troyo-Diéguez et. al. // Environmental and Experimental Botany. – 2006. – Vol. 58, Issues 1-3. – P. 188–196. doi: 10.1016/j.envexpbot.2005.08.003

4. Morales, G. V. Modelado Cinitico de la Disolucion de Hidroboracita en Soluciones de Acido Nitrico [Text] / G. V. Morales, O. D. Quiroga // Información tecnológica. – 2012. – Vol. 23, Issue 5. – Р. 109–114. doi: 10.4067/s0718-07642012000500011

5. Gezerman, A. O. Effects of Calcium Lignosulfonate and Silicic Acid on Ammonium Nitrate Degradation [Text] / A. O. Gezerman // Journal of Chemistry. – 2014. – Vol. 2014. – P. 1–6. doi: 10.1155/2014/426014

6. Pat. 220612 PL. Method for purification of solutions or calcium nitrate alloys and the solution/alloy of calcium nitrate [Text] / Obrestad T., Mutsaers P., Wallestad I. – No 20090416, published: 30.11.2015.

7. Kumpoviс, S. Redobrada procesnog kondenzata otplinjavanjem amonijaka u proizvodnji gnojiva KAN [Text] / S. Kumpoviс, S. Leakoviс // Kemija u Industriji. – 2011. – Vol. 60, Issue 10. – Р. 505–510.

8. Rodriguez, M. Evaluation of a synthesis process for the production of calcium nitrate liquid fertilizer [Text] / M. Rodriguez, H. Zea // International Journal of ChemTech Research. – 2015. – Vol. 7, Issue 4. – P. 1960–1965.

9. Pat. WO2006031139 A1. Method of calcium nitrate production [Text] / Nawrocki A., Olszewski R. – No PCT/PL2005/000054, declared: 22.08.2005; published: 23.03.2006.

10. Pat. US7029504 B2. Method for producing calcium nitrate granules [Text] / Rabie D. R. H., Morris W. R., Eygelaar J. P. G. – No US 10/275,062, declared: 02.05.2001; published: 18.04.2006.







Copyright (c) 2016 Mykola Oliinyk, Аnatoliy Shestozub, Vladimir Suprunchuk

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ISSN (print) 1729-3774, ISSN (on-line) 1729-4061