Efficient solvent extraction of phosphoric acid with dibutyl sulfoxide

Chen, Ming; Li, Jun; Jin, Yang; Jian, Luo; Zhu, Xinhua; Yu, Defang

doi:10.1002/jctb.5377

Cited by 17 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The object of the study was wet-process phosphoric acid for production of mineral fertilizers, obtained by dihydrate method from Karatau phosphorite (Table 1). Concentration of phosphoric acid is 25% by P2O5, temperature -25 0 C. To increase the concentration of phosphoric acid and its purification, the method of liquid extraction with organic solvents was used [29][30][31][32]. Phosphoric acid is washed out of the solvent with water according to the counterflow principle.…”

Section: Research Objects and Methodsmentioning

confidence: 99%

Study of the Process of Concentration of Wet-Process Phosphoric Acid on the Basis of Karatau Phosphorites

Abilkasova,

Akhmetova,

Kalimoldina

et al. 2024

Preprint

View full text Add to dashboard Cite

The article presents data on research of processes of obtaining concentrated phosphoric acid from Karatau phosphate rock. The research of purification of wet-process phosphoric acid by the method of liquid extraction with organic solvents is given. The influence of magnesium salts and sulfuric acid as impurities on the distribution factor of phosphoric acid is determined. It is shown that with increasing the initial concentration of phosphoric acid from 5.38 to 25.61% P2O5, the distribution factor at 25°C increases from 0.178 to 0.436 for n-butyl alcohol, from 0.06 to 0.183 for isoamyl alcohol, and from 0.120 to 0.320 for tributyl phosphate. Increasing the temperature from 25 to 60°C had little or no effect on the distribution factor. It was determined that the distribution factors of phosphoric acid depend on the initial concentration of phosphoric acid in the presence of sulfuric acid. It is shown that phosphoric acid is extracted better with n-butanol. Extraction of phosphoric acid with n-butanol on the principle of counterflow with subsequent azeotropic distillation of the solvent allows to obtain relatively pure and highly concentrated (56-63% of P2O5) phosphoric acid. The process of dehydration of phosphoric acid in the presence of sulfuric acid in the mixture was studied.

show abstract

Section: Research Objects and Methodsmentioning

confidence: 99%

Study of the Process of Concentration of Wet-Process Phosphoric Acid on the Basis of Karatau Phosphorites

Abilkasova,

Akhmetova,

Kalimoldina

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Both academia and industry have done a lot of work on extractant screening and purification performance evaluation. However, the extraction method uses a large amount of organic extractants (e.g., dibutyl sulfoxide [ 6 ] and cyclohexanol [ 7 ]), and the process produces poorly water-soluble sludge acid. Alternatively, the chemical precipitation method uses chemical precipitation agents, such as ammonia [ 5 ], NaOH [ 8 ], ammonium nitrate with hydrofluoric acid [ 9 ], and lime milk to precipitate the metallic cations in WPA in the form of phosphoric acid (double) salts.…”

Section: Introductionmentioning

confidence: 99%

Purification of Wet-Process Phosphoric Acid via Donnan Dialysis with a Perfluorinated Sulfonic Acid Cation-Exchange Membrane

Zhong¹,

Luo²,

Yan³

et al. 2021

Membranes

View full text Add to dashboard Cite

This work reports the application of an electromembrane process, Donnan dialysis (DD), for the purification of so-called wet-process phosphoric acid (WPA). Nitric acid is used as the stripping solution to remove metallic cations (mostly Fe3+, Al3+, and Mg2+) that are harmful to the further processing of WPA. The paper first presents a set of experimental data on the measurements of the metallic cation fluxes through a perfluorinated sulfonic acid cation-exchange membrane. Not only WPA, but also synthetic phosphoric acid solutions with mixed metallic cations (MPA) and with a single metallic cation (SPA) were studied. This confrontation confirms (1) that the order of metallic cations fluxes is Mg2+ > Al3+ > Fe3+; (2) that, compared with MPA, the purification effect of WPA causes only negligible change; (3) that, by comparing the DD processes with SPA and MPA solutions, the reason for the low transmembrane fluxes of Fe3+ and Al3+ could be explained by the large ionic charge and large hydrated ion radius. Furthermore, by analyzing the ion composition of membranes equilibrated in SPA solutions, we conclude that the forms of cations in the membrane are most likely Fe3+, Al3+, and Mg2+.

show abstract

“…In addition, the high concentration of these impurities affect negatively the filtration of phosphoric acid, and the solubility of the produced fertilizers (in the case of iron) (Abdel-Ghafar et al 2019) and have a harmful impact on the environment as well as the human health (in the case of cadmium) (Roberts 2014). Several processes have been designed for the purification of phosphoric acid including precipitation (Abdel-Ghafar et al 2019;Kouzbour et al 2019), solvent extraction (Ahmed et al 2007;Ahmed et al 2019;Chen et al 2018;Li et al 2017a;Li et al 2017b;Sanghani 2014;Ye and Li 2013), and extractantimpregnated resins (Reyes et al 2001). However, in the case of solutions containing low levels of metal ions (below a few hundred mg L −1 ), sorption processes may be interesting and competitive.…”

Section: Introductionmentioning

confidence: 99%

Cadmium and iron removal from phosphoric acid using commercial resins for purification purpose

Taha

Masoud

Khawassek

et al. 2020

Environ Sci Pollut Res

View full text Add to dashboard Cite

Three commercial resins bearing sulfonic, amino phosphonic, or phosphonic/sulfonic reactive groups have been tested for the removal of iron and cadmium from phosphoric acid solutions. The sorption properties are compared for different experimental conditions such as sorbent dosage (0.5-2.5 g L −1), phosphoric acid concentration (from bi-component solutions, 0.25-2 M), and metal concentrations (i.e., in the range 0.27-2.7mmolCdL −1 and0.54mmolFe L −1) with a special attention paid to the impact of the type of reactive groups held on the resins. The sulfonic-based resin (MTC1600H) is more selective for Cd (against Fe), especially at high phosphoric acid concentration and low sorbent dosage, while MTS9500 (aminophosphonic resin) is more selective for Fe removal (regardless of acid concentration and sorbent dosage). Equilibrium is reached within 2-4 h. The resins can be ranked in terms of cumulative sorption capacities according the series: MTC1600H > MTS9570 > MTS 9500. Sulfuric acid (0.5-1 M) can be efficiently used for the desorption of both iron and cadmium for MTC1600H, while for MTS9570 (phosphonic/sulfonic resin) sulfuric acid correctly desorbs Cd (above 96% at 1 M concentration), contrary to Fe (less than 30%). The aminophosphonic resin shows much poorer efficiency in terms of desorption. The sulfonic resin (i.e., MTC1600H) shows much higher sorption capacity, better selectivity, comparable uptake kinetics (about 2 h equilibrium time), and better metal desorption ability (higher than 98% with 1 M acid concentration, regardless of the type of acid). This conclusion is confirmed by the comparison of removal properties in the treatment of different types of industrial phosphoric acid solutions (crude, and pre-treated H 3 PO 4 solutions). The three resins are inefficient for the treatment of crude phosphoric acid, and activated charcoal pre-treatment (MTC1600H reduced cadmium content by 77%). However, MTC1600H allows removing over 93% of Fe and Cd for H 3 PO 4 pre-treated by TBP solvent extraction, while the others show much lower efficiencies (< 53%).

show abstract

Efficient solvent extraction of phosphoric acid with dibutyl sulfoxide

Cited by 17 publications

References 24 publications

Study of the Process of Concentration of Wet-Process Phosphoric Acid on the Basis of Karatau Phosphorites

Study of the Process of Concentration of Wet-Process Phosphoric Acid on the Basis of Karatau Phosphorites

Purification of Wet-Process Phosphoric Acid via Donnan Dialysis with a Perfluorinated Sulfonic Acid Cation-Exchange Membrane

Cadmium and iron removal from phosphoric acid using commercial resins for purification purpose

Contact Info

Product

Resources

About