湿法磷酸过程氟回收技术研究进展

doi:10.11962/1006-4990.2019-0471

Abstract

Abstract:

As a widely used chemical product,phosphoric acid（H₃PO₄） is often accompanied by a large amount of fluorine containing substances in its production process.As a high value-added material resource,the recycling of fluorine has been the main research direction of phosphorous chemical industry at present.The research status of fluorine recovery technology in preparation of wet-process phosphoric acid was summarized.The research status of three fluorine recovery technologies,such as gas phase fluorine recovery technology,liquid phase fluorine recovery technology and solid phase fluorine recovery technology,at home and abroad was introduced in detail.The technical principles and advantages-and-disadvantages of these fluorine recovery technologies were analyzed,and the key points of each fluorine recovery technology were summarized in order to promote the development of fluorine recovery technology in the future.

Key words: wet-process phosphoric acid, phosphoric acid concentration, fluorine, three waste treatment

CLC Number:

TQ126.35

Wang Xiheng,Sun Wenzhe. Research progress on fluorine recovery technology in wet process phosphoric acid[J]. Inorganic Chemicals Industry, 2020, 52(8): 25-29.

Figures/Tables 4

References 25

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钠盐	w（磷酸中氟）/%	钠盐	w（磷酸中氟）/%
碳酸钠	0.24	氯化钠	0.41
碳酸氢钠	0.26	硫酸钠	0.62

w（P₂O₅）/%	氟逸出率/%	w（P₂O₅）/%	氟逸出率/%
33~35	25~35	48~52	60
40	50	55~57	86

w（P₂O₅）	w（CaO）	w（SO₃）	w（Na）	w（F）	w（SiO₂）
19.11	0.62	0.72	6.38	16.00	10.66
w（SiF₆^2-）	w（H₂O）	w（K）	w（Fe₂O₃）	w（Al₂O₃）	w（MgO）
19.00	27.02	0.49	0.09	0.32	0.67

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Research progress on fluorine recovery technology in wet process phosphoric acid

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