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

Jin, Yang; Ma, Yujing; Yanling, Weng; Jia, Xiaoxu; Li, Jun

doi:10.1016/j.jiec.2013.12.033

Cited by 75 publications

(20 citation statements)

References 17 publications

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“…Mohammadi et al have proved that REs ions, especially for light REs, can form Res–Cl complexes in chloride media and the concentration of Res–Cl increases as Cl − concentration increases . It's likely that Res–Cl complexes are extracted in our experiments similarly to the previous works, but more work is still needed to determine it.…”

Section: Resultssupporting

confidence: 62%

Effective solvent extraction of La, Ce and Pr from hydrochloric acid with a novel extractant N,N-dihexyloxamic acid

Guo

Zhi

2016

J. Chem. Technol. Biotechnol

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BACKGROUND For the first time, N,N‐dihexyloxamic acid (HA) has been developed to extract La, Ce and Pr from hydrochloric acid solution in present work. RESULTS La, Ce and Pr can be extracted by HA in the pH range 1.3 to 2.0 using heptane as diluent. The extraction order was La < Ce < Pr. The separation factors were calculated to be 1.8 for La/Ce and for Ce/Pr. Based on slope analysis, all the rare earths (REs) were loaded in the form of REsCl0.6A2.4(HA)0.6 that may be a statistical expression of a mixture of complexes. Stripping tests showed that the loaded organic phase can be stripped by hydrochloric acid at medium acidity. CONCLUSION The extraction results obtained in the study suggest that N,N‐dihexyloxamic acid could serve as an effective extractant for La, Ce and Pr. © 2016 Society of Chemical Industry

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Section: Resultssupporting

confidence: 62%

Effective solvent extraction of La, Ce and Pr from hydrochloric acid with a novel extractant N,N-dihexyloxamic acid

Guo

Zhi

2016

J. Chem. Technol. Biotechnol

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“…As shown in Table , the distribution coefficients decrease with increase of temperature, which means the extraction process is exothermic. The Van't Hoff equation is always used for the calculation of enthalpy change in an extraction process and the equation is expressed as follows:…”

Section: Resultsmentioning

confidence: 99%

“…Mg 2+ (RSD = 2.07%) and Al 3+ (RSD = 1.79%) concentration in the aqueous phases was determined by ICP‐AES . Fe 3+ concentration in aqueous phase was determined by phenanthroline spectrophotometric method using UV–visible spectrophotometer (RSD = 0.84%) . Aqueous F ‐ concentration was determined by fluorine ion selective electrode method using an ion meter (RSD = 1.80%) .…”

Section: Methodsmentioning

confidence: 99%

Efficient solvent extraction of phosphoric acid with dibutyl sulfoxide

Chen

Jin

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND In china, the grade of phosphate ores has decreased sharply in recent years. Existing solvents are inefficient for the extraction of wet‐process phosphoric acid produced by low‐grade phosphate ores. Organic solvent dibutyl sulfoxide was developed to improve the extraction capacity of wet‐process phosphoric acid, especially at low‐acid concentration. RESULTS The effects of extraction time, temperature, phosphoric acid concentration and impurities concentration on the extraction were investigated. The extraction process is exothermic and the enthalpy change is –5.86 kJ mol‐1. Dibutyl sulfoxide is relatively selective for Mg2+ and Al3+ while the selectivities of Fe3+, F‐ and SO42‐ are moderate. The liquid–liquid equilibrium of water–dibutyl sulfoxide–phosphoric acid system was determined at 298.15 K. The stability of dibutyl sulfoxide and the process flows of extraction, scrubbing and stripping were investigated. The extraction mechanism of dibutyl sulfoxide for phosphoric acid was proposed and the extracted complex H3PO4·0.3DBSO was obtained. CONCLUSION Dibutyl sulfoxide is demonstrated to be a powerful solvent for the extraction of wet‐process phosphoric acid even at low concentrations. Dibutyl sulfoxide can be a potential supplemental organic solvent for the extraction of wet‐process phosphoric acid produced by low‐grade phosphate ores. © 2017 Society of Chemical Industry

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“…In order to predict the number of the theoretical stages required for the extraction process, a diagram for the extraction by cyclohexanol diluted in kerosene was constructed at 298.2K [22]. Using regression analysis, the following relations of the distribution of H 3 PO 4 in the organic and aqueous phases were established from the obtained equilibrium data: From Figure 8, it can be calculated that the cumulative extraction yield of H 3 PO 4 is 54.6%, 78.4%, 90.7% and 97.9%, respectively for each stage.…”

Section: Cross-current Multi-stage Extraction Of H 3 Pomentioning

confidence: 99%

Purification of Wet Process Phosphoric Acid by Solvent Extraction using Cyclohexanol

Jian

et al. 2017

SERDJ

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Solvent extraction using organic solvents is an important technology for the purification of wet process phosphoric acid (WPA). In this study, the purification process of WPA, using a new type of solvent extraction system, cyclohexanol diluted in kerosene, was investigated. The equilibrium phase diagram of the system H 3 PO 4 H 2 O solvent mixtures at 313.2K was obtained. The effects of extraction time, phosphoric acid concentration, cyclohexanol concentration, temperature, phase ratio on extraction efficiency were studied. The extracted species was shown to be 2H 3 PO 4 · 2C 6 H 12 O. The extraction process of H 3 PO 4 is exothermic and the enthalpy change, H, was obtained. Via a cross-current three-stage extraction, the solvent mixtures have a high efficiency for phosphoric acid purification from the actual industrial WPA with an H 3 PO 4 extraction yield of 90.2% at room temperature. The study is capable of enriching theoretical foundation and technical guidance for the phosphoric acid purification process.

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

Cited by 75 publications

References 17 publications

Effective solvent extraction of La, Ce and Pr from hydrochloric acid with a novel extractant N,N-dihexyloxamic acid

Effective solvent extraction of La, Ce and Pr from hydrochloric acid with a novel extractant N,N-dihexyloxamic acid

Efficient solvent extraction of phosphoric acid with dibutyl sulfoxide

Purification of Wet Process Phosphoric Acid by Solvent Extraction using Cyclohexanol

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