Dry single-stage method of sodium tripolyphosphate production – technological and economic assessment

• Authors: Katarzyna Gorazda , Zygmunt Kowalski , Regina Kijkowska , Danuta Pawłowska-Kozińska , Zbigniew Wzorek , Marcin Banach , Anna K. Nowak
• Languages of publication: EN

Abstracts

EN

The study presents a technology of sodium tripolyphosphate (STPP) production with the use of a dry, single-stage method. The reacting substrates (concentrated wet-process phosphoric acid - WPPA and solid Na2CO3 ) are mixed with a recycled final product (STPP) in a mixer, then a „quasi-dry” mixture is calcined in a rotary kiln. Thanks to that, some stages of a classic method of STPP production are eliminated: one of the two-stage neutralization of the phosphoric acid with sodium carbonate at temperature ~80°C, filtration of the neutralised solution and its evaporation, as well as the stage of drying a solution of mono- and di-sodium orthophosphate in a spray dryer. According to the presented technical and economical analysis, the costs of STPP production using a single-stage dry method can be 10% lower compared to the classic method.

Keywords

EN

sodium tripolyphosphate production; dry method; classic method; technical and economic analysis

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2014
• Volume: 16
• Issue: 1
• Pages: 41-44

Dates

published

1 - 03 - 2014

online

25 - 03 - 2014

Contributors

author

Katarzyna Gorazda

• Cracow University of Technology, Institute of Inorganic Chemistry and Technology, Warszawska 24, 31-155 Kraków, Poland

author

Zygmunt Kowalski

• Cracow University of Technology, Institute of Inorganic Chemistry and Technology, Warszawska 24, 31-155 Kraków, Poland

author

Regina Kijkowska

• Cracow University of Technology, Institute of Inorganic Chemistry and Technology, Warszawska 24, 31-155 Kraków, Poland

author

Danuta Pawłowska-Kozińska

• Cracow University of Technology, Institute of Inorganic Chemistry and Technology, Warszawska 24, 31-155 Kraków, Poland

author

Zbigniew Wzorek

• Cracow University of Technology, Institute of Inorganic Chemistry and Technology, Warszawska 24, 31-155 Kraków, Poland

author

Marcin Banach

• Cracow University of Technology, Institute of Inorganic Chemistry and Technology, Warszawska 24, 31-155 Kraków, Poland

author

Anna K. Nowak

• Cracow University of Technology, Institute of Inorganic Chemistry and Technology, Warszawska 24, 31-155 Kraków, Poland

References

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• 2. Kijkowska, R., Kowalski, Z., Pawłowska-Kozińska, D., Wzorek, Z. & Gorazda, K. (2008). Tripolyphosphate made from Wet-process Phosphoric Acid with the use of a rotary kiln. Ind. Eng. Chem. Res. 47, 6821-6827. DOI: 10.1021/ie800412q.[Crossref][WoS]
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• 5. Kowalski, Z., Kijkowska, R., Pawłowska-Kozińska, D. & Wzorek, Z. (2002). Sodium tripolyphosphate and others condensed sodium phosphates production methods. Pol. J. Chem. Tech. 4(3), 27-33.
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• 8. Kowalski, Z., Kijkowska R., Pawłowska-Kozińska, D., Wzorek, Z., Gorazda, K. & Banach, M. (2008). Report from realization of research project for State Committee for Scientifi c Research, The new technological solutions of sodium tripoliphosphate and sodium pyrophosphate production processes. Unpublished, Kraków, Poland (in Polish).
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Identifiers

DOI

10.2478/pjct-2014-0007