Phosphoric acid recovery from concentrated aqueous feeds by a mixture of di-isopropyl ether (DiPE) and tri-n-butylphosphate (TBP): extraction data and modelling

Assuncao, M. Campos; Cote, Gérard; André, M.; Halleux, Hubert; Chagnes, Alexandre

doi:10.1039/c6ra25440c

Cited by 29 publications

(26 citation statements)

References 64 publications

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“…HNO 3 is used as a dissolving agent in nuclear, chemical and metallurgical industries . At the present time, all plants for reprocessing spent nuclear fuels use the Plutonium Uranium Redox Extraction (PUREX) process for recovering the uranium and plutonium that are present in these fuels .…”

Section: Identifying Acidic Waste Waters For Acid Recoverymentioning

confidence: 99%

“…Phosphoric acid (H 3 PO 4 ) is an important industrial material and is widely used to produce phosphate fertilizers, food ingredients, and metal treatment products . There are two common industrial techniques to produce phosphoric acid.…”

Section: Identifying Acidic Waste Waters For Acid Recoverymentioning

confidence: 99%

“…The selection of the optimal technology for acid recovery is complex and no single process fits all scenarios. The optimal solution might reside in the combination of different technologies resulting in a process able to exploit the respective advantages and overcome the weaknesses of each technology . However, this study is focused on solvent extraction for acid recovery.…”

Section: Introductionmentioning

confidence: 99%

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A review of acid recovery from acidic mining waste solutions using solvent extraction

Kesieme

Chrysanthou

Catulli

et al. 2018

J of Chemical Tech & Biotech

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The minerals industry is increasingly being forced by regulatory and cost pressures to reduce the amount of liquid acidic waste they produce. This requires a strong focus on waste reduction by recycling, regeneration and reuse. Four mineral acids were examined for recovery from waste acidic solutions including H 2 SO 4 , HNO 3 , HCl, and H 3 PO 4 . The selection of the optimal extractant for acid recovery was based on extraction, stripping and scrubbing efficiencies. The extractants suitable for the recovery of H 2 SO 4 and HCl are in the order of TEHA > Cyanex 923 > TBP > Alamine 336. TEHA has the highest degree of acid extraction and stripping compared with Cyanex 923 and almost 99% of the acid can be stripped. Alamine 336 can extract higher acid (for H 2 SO 4 and HCl systems) than Cyanex 923 and TBP. However loaded acid for Alamine 336 system cannot be stripped using water at 60 ∘ C. For the recovery of nitric and phosphoric acids from acidic waste effluents, TBP was the best option. This work clearly demonstrates that extractant suitable for acid extraction may not be suitable for its recovery. However such extractant may be applied for the removal of acid from any waste acidic solution sacrificing the back extraction of the loaded acid. The effective implementation of options for acid recovery was examined to improve sustainability in the mineral industry. or FeS 2 (s) + 7∕2 O 2 (g) + H 2 O (l) → Fe 2+ (aq) + 2SO 2-4 (aq) + 2H + (aq) + energy J Chem Technol Biotechnol 2018; 93: 3374-3385

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Section: Identifying Acidic Waste Waters For Acid Recoverymentioning

confidence: 99%

Section: Identifying Acidic Waste Waters For Acid Recoverymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A review of acid recovery from acidic mining waste solutions using solvent extraction

Kesieme

Chrysanthou

Catulli

et al. 2018

J of Chemical Tech & Biotech

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“…The choice of an economically suitable technique depends upon many parameters such as the concentration of wet process phosphoric acid, the amount and the concentration of the co-dissolved impurities. These techniques are precipitation (Abdennebi et al, 2017), floatation (Haraldsen, 1991), membrane extraction (Al-Harahsheh et al, 2017;Machorro et al, 2013), crystallization ((Aaltonen et al, 2004;Chen et al, 2012), ion exchange (Marcus et al, 2004;Cheira, 2015), liquid-liquid extraction (Singh et al, 2009;Chen et al, 2016;Assuncao et al, 2017;Li et al, 2017), and solid phase extraction (Awwad et al, 2013 ).…”

Section: Introductionmentioning

confidence: 99%

The use of Alizarin modified bentonite for removal of some heavy metals ions from the wet process phosphoric acid

Cheira

Awadallah

Rashed

et al. 2018

Journal of Scientific Research in Science

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Wet process phosphoric acid is used in many fields after purification from its impurities. For this purpose, the aim of the present study is the production of the purified WPPA using economic adsorbent that is prepared by impregnation of activated bentonite with Alizarin to improve the adsorption capacity for the metallic impurities (Pb 2+ , Ni 2+ , and Zn 2+) in wet process phosphoric acid. This adsorbent is characterized by XRD, SEM-EDX, and FT-IR techniques. The adsorption process is studied as a function of influencing parameters such as H 3 PO 4 concentration, pH, different metallic impurities concentration, AIAB dose, contact time and temperature. The optimum adsorption parameters are applied on the WPPA to gain the purified WPPA. The adsorption-desorption procedures are repeated the number of times up to desorption efficiencies are reduced from 98% to 82% for the studied adsorbent after five consecutive cycles, which indicated that the good adsorption stability of the AIAB adsorbent for Pb 2+ , Ni 2+ , and Zn 2+ ions.

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“…Several organic solvents have been investigated and used for the purification of WPA . The problem is that existing organic solvents are inefficient for the extraction of WPA, especially for low‐concentration acid .…”

Section: Introductionmentioning

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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Phosphoric acid recovery from concentrated aqueous feeds by a mixture of di-isopropyl ether (DiPE) and tri-n-butylphosphate (TBP): extraction data and modelling

Cited by 29 publications

References 64 publications

A review of acid recovery from acidic mining waste solutions using solvent extraction

A review of acid recovery from acidic mining waste solutions using solvent extraction

The use of Alizarin modified bentonite for removal of some heavy metals ions from the wet process phosphoric acid

Efficient solvent extraction of phosphoric acid with dibutyl sulfoxide

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