A non-aqueous phase extraction system using tributyl phosphate for H3PO4 separation from wet-process superphosphoric acid: Extraction equilibrium and mechanism

Liu, Haozhou; Yang, Jingxu; Yang, Xiuying; Hu, Chao; Yang, Lin

doi:10.1007/s11814-021-1021-z

Cited by 9 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure c shows the potential-dependent Raman spectra of Pt(100) in 1.0 M H 3 PO 4 . The bands located at 501 and 893 cm –1 , observed throughout the potential range, are assigned to the symmetric in-plane bending vibration mode [δ s(P(OH)3) ] and symmetric stretched vibration [ v s(P(OH)3) ] of H 3 PO 4 in the electrolyte solution, respectively. , As the applied potential exceeded 1.05 V (RHE), a band located at 596 cm –1 , representing Pt–O in amorphous PtO 2 , emerged (second row in Figure c), and its intensity increased with the applied potential Figure d shows the potential-dependent Raman spectra in 1.0 M H 2 SO 4 , revealing four vibration bands of SO 4 2– : 450 cm –1 ( v 2(O – S – O) symmetric banding mode), 600 cm –1 ( v 3(O – S – O) asymmetric banding mode), 983 cm –1 [ v 1(O – S – O) symmetric stretching mode], and 1054 cm –1 [ v 4(S – O) asymmetric stretching mode], appearing at an initial potential of 0.80 V (RHE).…”

Section: Resultsmentioning

confidence: 99%

“…The bands located at 501 and 893 cm −1 , observed throughout the potential range, are assigned to the symmetric in-plane bending vibration mode [δ s(P(OH)3) ] and symmetric stretched vibration [v s(P(OH)3) ] of H 3 PO 4 in the electrolyte solution, respectively. 45,46 As the applied potential exceeded 1.05 V (RHE), a band located at 596 cm −1 , representing Pt−O in amorphous PtO 2 , emerged (second row in Figure 2c), and its intensity increased with the applied potential. 14 remained constant as the applied potential increased.…”

Section: Effect Of Anions On the Crystalline Growth Of Ptomentioning

confidence: 99%

See 1 more Smart Citation

Effect of Electrolyte Ions on Crystalline/Amorphous α-PtO₂ Formation in the Electrocatalytic Oxidation of Pt(100) Preferentially Oriented Nanoparticles

Sun,

Cao,

Han

et al. 2023

ACS Catal.

View full text Add to dashboard Cite

Degradation of the Pt electrode in fuel cells and water electrolysis is closely related to the position-exchange process, in which a Pt surface atom exchanges with an oxygen species and the subsequent formation of PtO 2 . With in situ electrochemical Raman spectroscopy, the effect of solvent electrolyte ions in the double-layer microenvironment on the morphology of α-PtO 2 during the electro-oxidation of Pt(100) preferentially oriented nanoparticles was investigated. The formation of crystalline α-PtO 2 depends on the generation and lattice transport of surface-adsorbed oxygen (O ads ) during the electro-oxidation of Pt as proposed by the crystal-growth theory; this theory suggests that a low diffusion rate benefits perfect crystal growth. This study examined electrolyte ions with different adsorption free energies on the Pt surface, as calculated with the density functional theory. Amorphous α-PtO 2 is generated in acidic solutions containing fluoride, perchlorate, and phosphorate with high adsorption free energies. By contrast, nitrate and sulfate ions exhibit low adsorption free energy and induce strong adsorption on the Pt surface, which competes with the adsorption of surface H 2 O and causes slow production and reduced diffusion of the oxygen atom, thereby favoring the crystallinity of α-PtO 2 . The Pt complex (PtCl 6 2−) is formed owing to strong complexation of chloride ions with Pt species, leading to the dissolution of Pt and production of amorphous PtO 2 . Moreover, a high concentration of hydrogen ions inhibits the oxidation of OH ads (adsorbed hydroxyl) to O ads , favoring the crystalline formation of PtO 2 during electro-oxidation. This study provides valuable insight that can be extended to synthesize other metal oxides, enabling control over the structure and morphology of materials and catalysts.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Effect Of Anions On the Crystalline Growth Of Ptomentioning

confidence: 99%

Effect of Electrolyte Ions on Crystalline/Amorphous α-PtO₂ Formation in the Electrocatalytic Oxidation of Pt(100) Preferentially Oriented Nanoparticles

Sun,

Cao,

Han

et al. 2023

ACS Catal.

View full text Add to dashboard Cite

show abstract

“…High metal cation extraction ratio, high phosphorus yield, and almost no quality requirements for phosphoric acid are its advantages over traditional purification methods. If combined with traditional processes, the generated raffinate acid can also be utilized for high value [13].…”

Section: Introductionmentioning

confidence: 99%

Clean and Efficient Utilization of Symbiotic Elements in Wet-Process Phosphoric Acid: Study on High-Value Process of Aluminum

Zhou

Wang

Zhen

et al. 2023

SERDJ

Self Cite

View full text Add to dashboard Cite

In the production of high-purity industrial phosphoric acid by wet process, the symbiotic elements are often treated as solid or liquid waste. This causes a waste of natural resources. In this work, a new wet-process phosphoric acid (WAP) purification route was proposed. In particular, the regeneration process of extractant was optimized, and the recovery process of aluminum was studied in detail (including stripping and crystallization). The effects of operational parameters and composition on the stripping behavior were investigated by single factor experiment and relevant analysis. Dissolution equilibrium date indicated the mother liquor could be circulated when the crystallization temperature was 298.15 K. Aiming to yield the purified extractant, the theoretical stages of stripping were simulated by plotting McCabe-Thiele diagram. Two-stage countercurrent extraction was carried out through a series of cascade experiments, indicating that over 95% Al 3+ was stripped into aqueous phase. Furthermore, Al 3+ in WPA was successfully changed into ammonium aluminum sulfate by this process, and it had higher purity than industrial grade. The results provide a basis for the high-quality utilization of associated resources in WPA.

show abstract

“…A major issue that the world is facing is reducing or eliminating phosphorus from water resources. Basically, a number of techniques have been used to remove phosphorus from wastewater, including 10.11113/mjfas.v19n5.3053 crystallisation, non-aqueous phase extraction, microalgae membrane, adsorption, electrocoagulation, electrochemical, sorption, membrane filtration and reverse osmosis [1][2][3][4][5][6][7][8][9][10][11]. Of these, solvent extraction is considered as an attractive option, owing to its simple operation, low cost as well as potential for phosphorus removal and recovery [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Novel Extraction of Phosphorus using Interaction of Tricaprylylmethylammonium Chloride (TOMAC) with Biodegradable Mixture of Vegetable Oils

Raja Sulaiman,

Rosli,

Othman

et al. 2023

Mal. J. Fund. Appl. Sci.

View full text Add to dashboard Cite

This work addresses the development of green formulation for phosphorus compound removal from aqueous solution via solvent extraction process. Several types of extractants, diluents and stripping agents were experimentally investigated and the best formulation was determined. Additionally, other parameters investigated were extractant and stripping agent concentrations. Results showed that TOMAC, a mixture of palm oil (PO) and sunflower oil (SO) as well as sodium chloride (NaCl) turned out to be the best extractant, diluent and stripping agent, respectively. Almost 100 % of 50 ppm of phosphorus were successfully extracted under optimum conditions of 0.3M TOMAC in a mixture of 50% PO + 50% SO. Fourier-transform infrared spectroscopy (FTIR) analysis confirmed the intermolecular bonding formation between phosphorus, vegetable oils and TOMAC molecules. Meanwhile, almost 96.5% of phosphorus can be recovered using 1.0M NaCl in two stages of stripping process. Stoichiometric studies showed that about one mole of TOMAC and NaCl were involved during the extraction and stripping reaction of phosphorus, respectively. It can be concluded that the solvent extraction with new green formulation containing TOMAC in interaction with vegetable oils seems to be one of the novel sustainable approaches in removing phosphorus from agricultural wastewater.

show abstract

A non-aqueous phase extraction system using tributyl phosphate for H3PO4 separation from wet-process superphosphoric acid: Extraction equilibrium and mechanism

Cited by 9 publications

References 30 publications

Effect of Electrolyte Ions on Crystalline/Amorphous α-PtO₂ Formation in the Electrocatalytic Oxidation of Pt(100) Preferentially Oriented Nanoparticles

Effect of Electrolyte Ions on Crystalline/Amorphous α-PtO₂ Formation in the Electrocatalytic Oxidation of Pt(100) Preferentially Oriented Nanoparticles

Clean and Efficient Utilization of Symbiotic Elements in Wet-Process Phosphoric Acid: Study on High-Value Process of Aluminum

Novel Extraction of Phosphorus using Interaction of Tricaprylylmethylammonium Chloride (TOMAC) with Biodegradable Mixture of Vegetable Oils

Contact Info

Product

Resources

About

A non-aqueous phase extraction system using tributyl phosphate for H3PO4 separation from wet-process superphosphoric acid: Extraction equilibrium and mechanism

Cited by 9 publications

References 30 publications

Effect of Electrolyte Ions on Crystalline/Amorphous α-PtO2 Formation in the Electrocatalytic Oxidation of Pt(100) Preferentially Oriented Nanoparticles

Effect of Electrolyte Ions on Crystalline/Amorphous α-PtO2 Formation in the Electrocatalytic Oxidation of Pt(100) Preferentially Oriented Nanoparticles

Clean and Efficient Utilization of Symbiotic Elements in Wet-Process Phosphoric Acid: Study on High-Value Process of Aluminum

Novel Extraction of Phosphorus using Interaction of Tricaprylylmethylammonium Chloride (TOMAC) with Biodegradable Mixture of Vegetable Oils

Contact Info

Product

Resources

About

Effect of Electrolyte Ions on Crystalline/Amorphous α-PtO₂ Formation in the Electrocatalytic Oxidation of Pt(100) Preferentially Oriented Nanoparticles

Effect of Electrolyte Ions on Crystalline/Amorphous α-PtO₂ Formation in the Electrocatalytic Oxidation of Pt(100) Preferentially Oriented Nanoparticles