Solvent extraction of Fe3+ from the hydrochloric acid route phosphoric acid by D2EHPA in kerosene

Yang Jin; Yujing Ma; Yanling Weng; Xuhong Jia; Jun Li

Journal of Industrial and Engineering Chemistry, Vol.20, No.5, 3446-3452, September, 2014

DOI10.1016/j.jiec.2013.12.033 Export Citation

Solvent extraction of Fe3+ from the hydrochloric acid route phosphoric acid by D2EHPA in kerosene

Yang Jin, Yujing Ma, Yanling Weng, Xuhong Jia, and Jun Li^†

Department of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, PR China

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It is necessary to remove Fe3+ from the hydrochloric acid route phosphoric acid before it is purified by trin-butyl phosphate (TBP), otherwise the final product will fail because of the excessive iron content. Di-(2-ethylhexyl) phosphoric acid (D2EHPA, HA) is effective for Fe3+ extraction. Therefore, the solvent extraction of Fe3+ from the HCl-route phosphoric acid by D2EHPA in kerosene is investigated. The effects of the extraction time, temperature and concentrations of phosphoric acid, D2EHPA, calcium chloride and Fe3+ on the extraction process are studied. The mechanism of the extraction is explained and the extracted species is demonstrated to be FeClA2·4HA. D2EHPA has a high efficiency for Fe3+ extraction from the synthesis and actual HCl-route phosphoric acid with extraction percent of 98.61% and 96.50%, respectively via a cross-current 3-stage extraction. The loaded organic phase is effectively stripped (99.9%) using 6 mol/L hydrochloric acid. The extractant also has a high stability under a closed operation condition. D2EHPA can serve as an adequate extractant for the extraction of Fe3+ from the HCl-route phosphoric acid.

Keywords:Solvent extraction;Fe3+;D2EHPA;Hydrochloric acid;Phosphoric acid

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[Referenced By]

[1] Habashi F, Awadalla FT, Yao XB, J. Chem. Technol. Biotechnol., 38, 115 (1987)

[2] Bakr MY, Hussien M, Indian J. Technol., 11, 397 (1973)

[3] Jin Y, Li J, Luo J, Zheng DS, Liu L, J. Chem. Eng. Data, 55(9), 3196 (2010)

[4] Tian HS, Tang SQ, Su YF, J. East China Inst. Chem. Technol., 14, 544 (1988)

[5] ElKhaiary MI, Chem. Eng. Technol., 20(5), 338 (1997)

[6] Yi SL, Chen YQ, Zhao TR, Cai CB, Jiangsu, Chem. Ind., 16, 24 (1988)

[7] Yang LX, Chen FF, CN Patent 101112978A (2007).

[8] El-Asmy AA, Serag HM, Mahdy MA, Amin MI, Sep. Purif. Technol., 61(3), 287 (2008)

[9] Daifullah AAM, Awwad NS, El-Reefy SA, Chem. Eng. Process., 43(2), 193 (2004)

[10] Biswas RK, Begum DA, Hydrometallurgy, 50, 153 (1998)

[11] Voorde IV, Latruwe K, Pinoy L, Courtijn E, Verpoort F, Solvent Extr. Ion Exch., 25, 809 (2007)

[12] Ma HR, Zhang L, Li DX, Sun WH, Environ. Chem., 30, 538 (2011)

[13] Singh DK, Yadav KK, Singh H, Sep. Sci. Technol., 48(10), 1556 (2013)

[14] Zheng DS, Li J, Zhou K, Luo JH, Jin Y, J. Chem. Eng. Data, 55(1), 58 (2010)

[15] Zhang YF, Lin GF, Li ZL, Analysis for Ammonium Phosphate Production, first ed., Chengdu University of Science and Technology Press, Chengdu, 1991.

[16] Zhu T, Li CM, J. Chem. Fertilizer Ind., 29, 23 (2002)

[17] Gamlen GA, Jordan DO, J. Chem. Soc., 1435 (1953)

[18] Haggag A, Sanad W, Alian A, Tadroes N, J. Radioanal. Chem., 35, 253 (1977)

[19] Baker HT, Baes CF, J. Inorg. Nucl. Chem., 24, 1277 (1962)

[20] Wang LS, Long ZQ, Huang XW, Yu Y, Cui DL, Zhang GC, Hydrometallurgy, 101, 41 (2010)

[21] Wang LS, Yu Y, Liu Y, Long ZQ, Rare Metals, 30, 211 (2011)

[22] Mellah A, Benachour D, Sep. Purif. Technol., 56(2), 220 (2007)

[23] Irving H, Edgington DN, J. Inorg. Nucl. Chem., 10, 306 (1959)

[24] Chen MH, Cong DZ, Fang TN, Qi MZ, Principles of Chemical Engineering II, third ed., Chemical Industry Press, Beijing, 2012.

[25] Lo TC, Handbook of Solvent Extraction, New York, Wiley, 1983.