All Issue

2025 Vol.58, Issue 2 Preview Page

Original research article

Simultaneous removal of fluorine and sulfate impurities from phosphoric concentrate using CaCO3 and Ca(H2PO4)2
Yumrak Oh1*
,
Israiljon Turgunovich Shamshidinov1
,
Rixsitilla Yunusali Najmiddinov2
1Professor, Department of Chemistry, Namangan Engineering Construction Institute, 12 House, lslam Karimov St., Namangan city 160103, Uzbekistan
2Associate Professor, Department of Chemistry, Namangan Engineering Construction Institute, 12 House, lslam Karimov St., Namangan city 160103, Uzbekistan
*Corresponding Author
31 May 2025. pp. 228-239
PDF XML Citation
Abstract

The objective of this study is to investigate the process of producing environmentally safe and highly water- soluble ammonium phosphate by removing fluorine and sulfate impurities during the extraction of phosphoric acid from phosphorite in the Central Kyzyl Kum region of Uzbekistan and by purifying associated impurities such as iron, aluminum, calcium, magnesium, sulfate, and fluorine during the ammonization stage of the extracted phosphoric acid. For the analysis of experimental results, chemical and physicochemical methods (spectrophotometry, pH measurement, electron microscopy analysis) were utilized, along with statistical processing of experimental data. By removing fluorine and sulfate impurities during the phosphoric acid extraction process, the technological process was simplified, and by further purifying associated impurities such as iron, aluminum, calcium, magnesium, and fluorine from the extracted acid, the content of P2O5, the key component of the final product, was increased. The research results confirmed that adding calcium carbonate or monocalcium phosphoric to the extracted phosphoric acid (EPA) slurry based on Central Kyzyl Kum phosphorite enables the simultaneous removal of fluorine and sulfate. Furthermore, by completely purifying the partially refined phosphoric acid obtained during the extraction process in the ammonization stage, high-quality, highly water-soluble ammonium phosphate was produced. The resulting product is a fully water-soluble nitrogen-phosphorus fertilizer that can be used as a suitable fertilizer for drip irrigation and hydroponic cultivation of agricultural crops.

Flowchart for the production of extracted phosphoric acid (EPA) purified from fluorine and sulphate using carbonate feedstock.
Keywords
Ammonium phosphates
Extraction phosphoric acid (EPA)
Fluorine-free fertilizer
Nitrogen- phosphorus fertilizer
Phosphate
References
1

Alimov UK, Reimov AM, Namazov SS, Begov BM. 2010. The insoluble part of phosphorus fertilizers, obtained by processing of phosphorites of central kyzylkum with partially ammoniated extraction phosphoric acid. Russian J. Appl. Chem. 83:545-552. https://doi.org/10.1134/S107042721030328

10.1134/S107042721030328
2

Angelov AI, Levin BV. 2003. Klassen PV. Global production and consumption of phosphate raw materials. Mining Journal. Moscow, 2003. No. 4-5. P. 6-11.

3

Arifdjanova KS, Khuzhamkulov SZ, Normurodov BA, Shamaev BE. 2016. Mirzakulov KC. Desulfurization of extractive phosphoric acid from Central Kyzylkum phosphorites with unrefined phosphate raw materials // Chemical Technology. Control and Management. Tashkent: TDTU, 3:32-39.

4

DECFP (Degree and Eeconomic Consequences of Fluoride Pollution). 1983. rview information. Obninsk, Issue 1. 55 p.

5

Dolimov TN, Shayakubov TS. 1998. Geology and mineral resources of the Republic of Uzbekistan - Tashkent University, 724 p.

6

Gafurov Q, Shamshidinov I. 2010. Shamshidinov I. Theory and technological calculations of mineral fertilizer production. T.: Science and Technology, 360 p.

7

Khodjamkulov SZ, Mirzakulov KC, Melikulova GM, Usmanov I. 2020. Research of the process of deformation of extractional phosphoric acid from phosphorites of central kyzylkum. Chemistry and Chemical Engineering. 18:37-39 https://doi.org/10.70189/1992-9498.1267

10.70189/1992-9498.1267
8

Khuzhamkulov SZ, Asamov DD, Bardin SV. 2008a. Mirzakulov KC. Development of defluorination technology for extractive phosphoric acid from Central Kyzylkum with sodium silicate recycling. Chemical Technology. Control and Management. Tashkent: TDTU, 4:41-45.

9

Khuzhamkulov SZ, Asamov DD, Bardin SV. 2008b. Mirzakulov KC. Defluorination of extractive phosphoric acid with sodium salts. Chemistry and Chemical Technology. Tashkent: TCTI, 2:16-19.

10

Khuzhamkulov SZ, Asamov DD, Bardin SV. 2008c. Mirzakulov KC. Defluorination of extractive phosphoric acid from Central Kyzylkum in the presence of sodium silicate. Chemistry and Chemical Technology. Tashkent: TCTI, 4:8-11.

11

Khuzhamkulov SZ, Melikulova GE, Mirmusaeva KS, Mirsaidov MK, Mirzakulov KC. 2016. Study of the processes of obtaining sodium fluorosilicate from extractive phosphoric acid based on phosphorites of Central Kyzylkum. Chemical technology. Control and management. Tashkent: TSTU, 67:34-40.

12

Kochetkov SP, Smirnov NN. Ilyin AP. 2007. Concentration and purification of extractive phosphoric acid. Ivanovo: Ivanovo State Chemical-Technological University, 304p. ISBN 5-9616-0212-5\

13

Lee CW, Kim YM, Song YS, Park HJ, Lee YJ. 2023. Optimal fertilizer application rates for fertigation system to grow watermelon in nutrient-rich greenhouse soils, Korean J. Soil Sci. Fert. 56:162-168. https://doi.org/10.7745/KJSSF.2023.56.2.162

10.7745/KJSSF.2023.56.2.162
14

Lee YN, Kim SS, Yun JJ, Shim JH, Jeon SH, Roh AS, Kwon SI, Kim SH. 2024. Comparison of fertilizer type and usage for fruit crops cultivation of Korea in 2018 and 2022, Korean J. Soil Sci. Fert. 57:411-417. https://doi.org/10.7745/KJSSF.2024.57.4.411

10.7745/KJSSF.2024.57.4.411
15

Mamurov BA, Shamshidinov IT, Usmanov II, Kodirova GK. 2019. Study of the process of neutralization of phosphoric acid extraction by chalk. Universum: Chemical Sciences: electronic scientific journal, 57:21-26. https://doi.org/10.32743/UniChem.2019.56.2

10.32743/UniChem.2019.56.2
16

Mirmusaeva KS. 2011. Development of technology for sodium orthophosphate production based on extractive phosphoric acid from Central Kyzylkum. Dissertation for the degree of Candidate of Technical Sciences. Tashkent. 157 p.

17

Mirzakulov KC, Usmanov II, Sadykov BB, Volynskova NV, Melikulova GE, Umarov SI. 2015. Patent No. IAP 05054 UZ. Method for producing feed precipitate. IPC C05B3/00, C05B11/00. 2015.

18

NRSEUNR (National report on the state of the environment and the use of natural resources in the Republic of Uzbekistan 1988-2007). 2008. Tashkent, 298 p.

19

SAFPD (Strategy of Actions on Five Priority Directions for the Development of the Republic of Uzbekistan for 2017-2021). 2017. Decree of the president of the republic of uzbekistan No. PF-4947 dated 07.02.2017. Tashkent.

20

Shamshidinov IT. 2014. Technology of inorganic substances and mineral fertilizers: Textbook. T: Economics and Finance, 24 p.

21

Userbaeva D, Toirov ZK, Erkayev AU, Kaipbergenov AT. 2010. Desulfurization and impurity removal of extractive phosphoric acid from Central Kyzylkum phosphorites. Chemistry and Chemical Technology. Tashkent: TCTI, 2:2-4.

Information
  • Publisher :Korean Society of Soil Science and Fertilizer
  • Publisher(Ko) :한국토양비료학회
  • Journal Title :Korean Journal of Soil Science and Fertilizer
  • Journal Title(Ko) :한국토양비료학회 학회지
  • Volume : 58
  • No :2
  • Pages :228-239
  • Received Date : 2025-03-24
  • Revised Date : 2025-05-17
  • Accepted Date : 2025-05-19
  • DOI :https://doi.org/10.7745/KJSSF.2025.58.2.228
Journal Informaiton Korean Journal of Soil Science and Fertilizer Korean Journal of Soil Science and Fertilizer
KJSSF Online Submission
  • NRF
  • KOFST
  • crossref crossmark
  • crossref cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close