Study on Mg2+ removal from ammonium dihydrogen phosphate solution by solvent extraction with di-2-ethylhexyl phosphoric acid

Jian, Luo; Li, Jun; Zhou, Kun; Jin, Yang

doi:10.1007/s11814-010-0468-0

Cited by 7 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…17 The mutual solubility was also proved by mixing different concentrations of TBP and cyclohexanol at different temperature. Therefore, the extraction system H 3 spheric pressure is shown in Fig. 3.…”

Section: Equilibrium Studies Of Extraction System H 3 Po 4 −H 2 O Solmentioning

confidence: 99%

“…The apparent extracted complex of the extraction reaction in Eq. (S-1) was suggested to be 1.8H 3 19,20 These issues are examined through IR spectra, which is presented in Supplementary material.…”

Section: Ir Absorption Spectra Of the Extracted Complexesmentioning

confidence: 99%

“…Several physicochemical treatment techniques have been investigated for purifying WPA 580 L I et al including adsorption, crystallization, ion exchange, ion precipitation and solvent extraction. 3,4 Experimental and technical researches indicate that solvent extraction is a practical, efficient and economical method for WPA purification which is accepted as the most widely-used technique applied in the industrial production process at present. 5,6 Many types of organic solvents have been investigated to serve as the extractant, e.g., esters, 7 alcohols 8 and ketones.…”

Section: Introductionmentioning

confidence: 99%

“…PHOSPHORIC ACID PURIFICATION BY SOLVENT EXTRACTION 591 H 3 PO 4 . Based on the good mutual solubility of TBP and cyclohexanol, the equilibrium phase diagram of the system H 3 PO 4 −H 2 O−TC at 298.2 K was obtained.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Wet process of phosphoric acid purification by solvent extraction using tri-n-butyl phosphate and cyclohexanol mixtures

Jun

Jin

et al. 2017

J Serb Chem Soc

Self Cite

View full text Add to dashboard Cite

Solvent extraction is an efficient, economical and widely-used technology for the purification of wet process phosphoric acid (WPA). This present work focused on the development of a solvent extraction system, TC, representing tri-n-butyl phosphate (TBP) and cyclohexanol mixtures. The equilibrium phase diagram of the system H 3 PO 4 −H 2 O−TC at 298.2 K and atmospheric pressure was obtained. The effects of extraction time, phosphoric acid concentration, extractant concentration, temperature and phase volume ratio on extraction efficiency were studied. The extracted complexes were estimated to be 1.8H 3 PO 4 2TC. The extraction process of H 3 PO 4 was exothermic and the enthalpy change, ΔH, was obtained. The solvent mixtures had a high efficiency for phosphoric acid purification via multi-stage counter-current extraction from the industrial WPA in a reciprocating plate extraction column with an H 3 PO 4 extraction yield of 85.08 % at 313.2 K. The stability, extraction efficiency and recycling capability of TC for H 3 PO 4 extraction were also estimated.

show abstract

Section: Equilibrium Studies Of Extraction System H 3 Po 4 −H 2 O Solmentioning

confidence: 99%

Section: Ir Absorption Spectra Of the Extracted Complexesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Wet process of phosphoric acid purification by solvent extraction using tri-n-butyl phosphate and cyclohexanol mixtures

Jun

Jin

et al. 2017

J Serb Chem Soc

Self Cite

View full text Add to dashboard Cite

show abstract

“…The removal of Mg 2+ and Al 3+ in WPA by ion exchange resin was studied, in which the related kinetic models for these two types of ions were acquired, respectively . In addition, the di‐2‐ethylhexyl phosphate was used to remove Mg 2+ from the MAP solution by solvent extraction, and superior grade MAP was obtained …”

Section: Introductionmentioning

confidence: 99%

Chelation of metal ions with citric acid in the ammoniation process of wet‐process phosphoric acid

Wan

Luo

et al. 2019

Can J Chem Eng

View full text Add to dashboard Cite

A new process is proposed in which citric acid is added during the ammoniation process of wet-process phosphoric acid (WPA) to chelate metal ions to produce fertilizer ammonium dihydrogen phosphate (MAP) containing medium trace elements. The parameters of the chelation reaction were studied systematically and the results show that the optimal reaction condition is pH 3.0, reaction time 60 minutes, temperature 50.0 C, and citric acid content 1.48%. The XRD patterns show that the waterinsoluble compounds are complex mixtures, and the composition of the waterinsoluble compounds are changed through the addition of citric acid. FTIR and XPS analyes further demonstrate that water-insoluble compounds are complex mixtures. The XRD patterns of the MAP products indicate that the structure and morphology of the MAP were changed by the addition of citric acid. In addition, the contents of major elements, medium elements, and trace elements in the MAP product are 68.72%, 0.24%, and 0.50%, respectively, which is consistent with the relevant China national standard. K E Y W O R D Sammonium dihydrogen phosphate, chelation, citric acid, wet-process phosphoric acid

show abstract

Selectivity and competitive mechanism of cation exchange resin for Fe, Mg, and Al ions in phosphoric acid

Yan,

Zhen,

Wang

et al. 2023

Can J Chem Eng

View full text Add to dashboard Cite

The presence of iron, magnesium, and aluminum elements as the primary impurities in wet‐process phosphoric acid (WPA) adversely affects the industrial phosphoric acid and subsequent phosphorus chemical products. This study aims to investigate the selectivity and competition mechanism of Sinco‐430 cation exchange resin for Fe, Mg, and Al ions in phosphoric acid solution. By studying the effects of different process conditions on the removal efficiency, the suitable conditions for the static removal of metal ions from Fe‐Mg, Al‐Mg, and Fe‐Al binary systems were determined: solid–liquid mass ratio (S/L) of 0.3, phosphoric acid concentration of 27.61 wt.%, system temperature of 50°C, and rotational speeds of 200, 400, and 200 rpm, respectively. By calculating the selectivity coefficients of the resin for metal ions under different experimental conditions and mutual replacement experiments, the semi‐empirical formulas for the selectivity coefficients were derived and order of selectivity was determined as follows: Mg2+ > Fe2+ > Al3+. Visual MINTEQ 3.1 software and density functional theory (DFT) calculations demonstrated that at low pH, the main forms of Fe, Mg, and Al present in phosphoric acid were FeH2PO4+, Mg2+, and AlH2PO42+, respectively. This finding explained the differences in selectivity of the resin for Fe, Mg, and Al. The dynamic removal of metal ions from phosphoric acid was investigated. The order of metal ion selectivity of the resin by the dynamic method is the same as that of the static method, and the dynamic exchange behaviour was most consistent with the Yan model.

show abstract

Study on Mg2+ removal from ammonium dihydrogen phosphate solution by solvent extraction with di-2-ethylhexyl phosphoric acid

Cited by 7 publications

References 6 publications

Wet process of phosphoric acid purification by solvent extraction using tri-n-butyl phosphate and cyclohexanol mixtures

Wet process of phosphoric acid purification by solvent extraction using tri-n-butyl phosphate and cyclohexanol mixtures

Chelation of metal ions with citric acid in the ammoniation process of wet‐process phosphoric acid

Selectivity and competitive mechanism of cation exchange resin for Fe, Mg, and Al ions in phosphoric acid

Contact Info

Product

Resources

About