鹽酸法濕法磷酸凈化生產(chǎn)工業(yè)磷酸二氫鉀研究
[Abstract]:A solvent extraction process for the production of industrial potassium dihydrogen phosphate by hydrochloric acid wet process phosphoric acid was developed. The process consists of three steps: extraction and iron removal, extraction and separation of phosphoric acid, and preparation of potassium dihydrogen phosphate. The extraction rate of trivalent iron ion from hydrochloric acid wet process phosphoric acid was 88.27 by countercurrent extraction of bis (2-ethylhexyl) phosphoric acid, and crude phosphoric acid was obtained. Trichlorobutyl phosphate was used to extract iron crude phosphoric acid. The extraction rate of each component from large to small was 3 valent iron ion, phosphoric acid, chloride ion, fluorine ion, calcium ion, aluminum ion, magnesium ion, extraction rate of phosphoric acid was 95.1010. When the organic phase was washed twice, the removal rate of calcium ion reached 99.36%. A high purity of phosphoric acid with a mass fraction of 16.38% was obtained from the organic phase after countercurrent stripping with deionized water. In the reaction of stripping phosphoric acid with potassium chloride, each index of potassium dihydrogen phosphate produced by solvent extraction method meets the requirements of HG2321-1992 industrial first class product.
【作者單位】: 四川大學(xué)化學(xué)工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(21306116) 四川大學(xué)科技計(jì)劃項(xiàng)目磷化工關(guān)鍵技術(shù)與產(chǎn)業(yè)化資助項(xiàng)目(SCU2015C002);四川大學(xué)大學(xué)生創(chuàng)新創(chuàng)業(yè)訓(xùn)練計(jì)劃資助項(xiàng)目(201510610536)
【分類號(hào)】:TQ126.35;TQ131.13
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