The synthesis of tripolyphosphate using a one-stage method and a laboratory rotary kiln

• Authors: Zygmunt Kowalski , Agnieszka Makara
• Languages of publication: EN

Abstracts

EN

In the study, sodium tripolyphosphate (STPP) was obtained according to the one-stage method. Batch mixes with varied degrees of soda ash neutralization were produced using thermal or wet processing phosphoric acid and/ or recycled STPP calcined in a laboratory rotary kiln. Chromatographic analysis of the phosphate forms showed that products containing as much as 94.73% of a single component were produced. At STPP recycling rates of 2.5 and 5, products with a low bulk density ranging between 0.437-0.547 kg/dm3 were obtained. The recycling of STPP reduces the insoluble substance content, which affects the properties of the product. The phase composition of the products largely depends on the type of recycled phase of sodium tripolyphosphate (phase I and/or phase II) and the calcining temperature.

Keywords

EN

sodium tripolyphosphate; rotary kiln; calcining; one-stage method

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2014
• Volume: 16
• Issue: 1
• Pages: 36-40

Dates

published

1 - 03 - 2014

online

25 - 03 - 2014

Contributors

author

Zygmunt Kowalski

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

author

Agnieszka Makara

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

References

• 1. Van Wazer, J.R. (1958). Phosphorus and Its Compounds (Vol. 1). New York: Interscience Publishers.
• 2. Toy, A.D.E. (1973). The Chemistry of Phosphorus (Vol. 3). New York: Stauffer Chemical Company.
• 3. Davies, D.R. & Corbridge, D.E.C. (1958). The Crystal Structure of Sodium Triphosphate, Na5P3O10, Phase II. Acta Crystallogr. 11, 315-319. DOI: 10.1107/S0365110X58000876.
• 4. Dymon, J.J. & King, A.J. (1951). Structure studies of the two forms of sodium tripolyphosphate. Acta Crystallogr. 4, 378-379. DOI: 10.1107/S0365110X51001197.[Crossref]
• 5. Kowalski, Z., Kijkowska, R., Pawłowska-Kozińska, D. & Wzorek, Z. (2002). Sodium tripolyphosphate and others condensed sodium phosphates production methods. Pol. J. Chem. Technol. 4, (3), 27-33.
• 6. Makara, A. (2012). Studies on production of sodium tripolyphosphate with a one-stage method with control of main ingredient content and crystalline phases. Ph.D. thesis, Cracow University of Technology, Cracow.
• 7. Makara, A., Kowalski, Z. & Banach, M. (2011). Polish patent application P. 397098.
• 8. Makara, A., Kowalski, Z. & Banach, M. (2011). Polish patent application P. 397286.
• 9. Makara, A., Kowalski, Z. & Banach, M. (2011). Effect of chemical composition of phosphoric acid on the formation of sodium tripolyphosphate. Przem. Chem. 90/5, 900-903.
• 10. Makara, A., Kowalski, Z. & Banach, M. (2012). Control of phase composition sodium tripolyphosphate at varying parameters of calcining and product recycling. Przem. Chem. 91/5, 860-864.
• 11. Polish standard PN-93 C-84300/21. Methods of testing of phosphorus salts. Determination of the content of insoluble substances in water.
• 12. Polish standard PN-80/C-04532. Determination of bulk density.
• 13. Polish standard PN 93/C-84300/03. Methods of testing of phosphorus salts. Determination of the total content of phosphorus(V) oxide.
• 14. Gorazda, K., Banach, M., Makara, A. & Wzorek, Z. (2011). Increasing the bulk density of STPP - infl uence of the process parameters. Pol. J. Chem. Technol. 13, 2, 40-44.[WoS]
• 15. 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, 18, 6821-6827. DOI: 10.1021/ ie800412q[Crossref][WoS]

Identifiers

DOI

10.2478/pjct-2014-0006