SYNTHESIS OF SODIUM AMMONIUM HYDROPHOSPHATE AND SODIUM DIHYDROPHOSPHATE BASED ON EXTRACTION PHOSPHORIC ACID FROM CENTRAL KYZYLKUM PHOSPHORITES

Authors

Kamola Arifdjanova, Tashkent Chemical-Technological Institute, UzbekistanFollow
Kholtura Mirzakulov, Tashkent Chemical-Technogical Institute, UzbekistanFollow
Sherzod Khujamberdiev, Tashkent Chemical-Technological Institute, UzbekistanFollow
Melikulova Gavkhar, Tashkent Chemical-Technological Institute, UzbekistanFollow

Abstract

The aim of the research is the synthesis of sodium ammonium hydrogen phosphate and sodium dihydrogen phosphate based on purified extraction phosphoric acid.

The acid was purified from accompanying impurities by precipitation methods using sodium carbonate and metasilicate, washed burnt phosphoconcentrate, barium carbonate, acid neutralization with gaseous ammonia. Pre-neutralization of the purified solution of monoammonium phosphate with sodium carbonate to the ratio Na₂O:P₂O₅ = 0.44 and subsequent drying at a temperature of 50 °С allows to obtain sodium ammonium hydrogen phosphate tetrahydrate, and at 100 °С sodium dihydrogen phosphate monohydrate.

The individuality and purity of the synthesized substances was established by the methods of X-ray diffraction, IR spectroscopy, thermogravimetry and scanning electron microscope.

Recommended Citation

Arifdjanova, Kamola; Mirzakulov, Kholtura; Khujamberdiev, Sherzod; and Gavkhar, Melikulova (2021) "SYNTHESIS OF SODIUM AMMONIUM HYDROPHOSPHATE AND SODIUM DIHYDROPHOSPHATE BASED ON EXTRACTION PHOSPHORIC ACID FROM CENTRAL KYZYLKUM PHOSPHORITES," CHEMISTRY AND CHEMICAL ENGINEERING: Vol. 2021: No. 1, Article 4.
DOI: https://doi.org/10.51348/DMWH3520
Available at: https://cce.researchcommons.org/journal/vol2021/iss1/4