THE MAIN CHEMICAL COMPOSITION OF PHOSPHOGYPSUM. FORMED AT THE OBTAINING OF EXTRACTION PHOSPHORIC ACID BY CLINKER METHOD
Аннотация
At present day. the extraction of phosphoric acid from phosphate raw materials using sulfuric acid can be divided into two directions. first one is that decomposition of phosphate raw materials with wet-processing phosphoric acid (WPPA) and then extraction with sulfuric acid (wet method) [1] and second one is that initially. phosphate raw material is treated with 93-98% sulfuric acid in the solid phase. and then phosphate acid is extracted from it with water (clinker method) [2.3]. The former method. the wet method. is very common around the world. This method is used in countries with almost phosphate raw materials. In these processes. calcium sulfate is formed as a precipitate and it is separated from the main suspension.
Библиографические ссылки
Volynskova N.V., Sadykov B.B., Mirzakulov Kh.Ch. Intensification of the process of extraction phosphoric acid from the thermal concentrate of the Central Kyzylkum // Achievement and prospects for the complex chemical processing of fuel and mineral raw materials in Uzbekistan: Proceedings of the Republican Scientific and Technical Conference. October 7-8, 2008. - Tashkent. - 2008. - pp. 86-89.
United States Patent of Fice 2,504,544. Process of manufacturing phosphoric
acid // Casimer C. Legal, Jr., Pasadena, Thomas O. Tongue, Curtis Bay, and Edward H. Wight. April 18, 1950.
United States Patent N3935298. Process for the preparation of Phosphoric acid//Yujiro Sugahara, Yoshibumi Noshi; Hiroyuki Naito; Akira Takahashi; Shoji Shoji. 1976, 27th January.
Nodirov A.A., Sultonov B.E., Abdullajanov O.A., Kholmatov D.S. The clinker method of extracting phosphoric acid from Central Kyzylkum phosphorites / Scientific Bulletin of NamSU, No. 7, 2021, pp. 69-75.
