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

2017 ◽  
Vol 82 (5) ◽  
pp. 579-592 ◽  
Author(s):  
Xing Li ◽  
Jun Li ◽  
Yang Jin ◽  
Ming Chen ◽  
Dongya Feng ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Phosphoric Acid ◽  
High Efficiency ◽  
Extraction Efficiency ◽  
Equilibrium Phase ◽  
Volume Ratio ◽  
Extraction Column ◽  
Solvent Mixtures ◽  
Extractant Concentration ◽  
Wet Process

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 H3PO4?H2O?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 1.8H3PO4 2TC. The extraction process of H3PO4 was exothermic and the enthalpy change, ?H, 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 H3PO4 extraction yield of 85.08 % at 313.2 K. The stability, extraction efficiency and recycling capability of TC for H3PO4 extraction were also estimated.

scholarly journals Molten solvent extraction behavior of palladium with 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone at 60 °C

2007 ◽  
Vol 5 (3) ◽  
pp. 912-921 ◽  
Author(s):  
Bo Peng ◽  
Xiaojun Guo ◽  
Xuefen Mao ◽  
Jinzhang Gao
Keyword(s):  
Solvent Extraction ◽  
Precious Metal ◽  
Extraction Efficiency ◽  
Equilibrium Temperature ◽  
Paraffin Wax ◽  
Analysis Method ◽  
Extractant Concentration ◽  
Slope Analysis ◽  
Extraction Behavior ◽  
Ph Range

AbstractThe solvent extraction behavior of precious metal palladium with 1-phenyl-3-methyl-4-benzoyl-5-pyrazone (PMBP) into molten paraffin wax has been studied in the temperature range from 55 to 75 °C. The complex consisting of PMBP and palladium was extracted into molten wax phase in the pH range from 1.0 to 3.5 at 60 °C. The extraction efficiency was up to 97% at the experimental pH. The stoichiometry of the extracted species of palladium was determined on the basis of slope analysis method. The effects of time to achieve equilibrium, temperature, and extractant concentration on the extraction were discussed. The thermodynamic data indicate that the extraction is an endothermic reaction and the increase of temperature promotes the extraction of palladium into molten paraffin wax and the extraction of palladium with PMBP is entropy controlled at high temperatures.

scholarly journals Increasing the depth of apatite processing by extracting rare-earth elements

2021 ◽  
Vol 266 ◽  
pp. 02002
Author(s):  
E.S. Lukyantseva ◽  
V.V. Sergeev
Keyword(s):  
Rare Earth ◽  
Phosphoric Acid ◽  
Rare Earth Elements ◽  
Extraction Process ◽  
Extractant Concentration ◽  
Wet Process ◽  
Heavy Rare Earth Elements ◽  
Knowledge Intensive ◽  
The Impact ◽  
Method Of Extraction

Currently, most high-technology productions are impossible without rare-earth elements (REE). The heavy rare-earth elements are of great interest as they have the highest market value and are in demand in the vast majority of knowledge-intensive industries. The main recourse of REE in Russia is apatite ore which is used in the production of fertilizers. As a result of its leaching, about 15-20% of REE goes to wet-process phosphoric acid. To enhance the depth of apatite processing, it is necessary to develop a technology which will allow obtaining rare-earth elements as by-products. The method of extraction and concentration of REE discussed in this paper was conducted by using the extractant based on di-(2-ethylhexyl) phosphoric acid (D2EHPA). The mechanism of extraction was studied, as well as the impact of the extractant concentration, phase ratio and the number of stages on the extraction process.

Distribution of natural radionuclides during the processing of phosphate rock from Itataia-Brazil for production of phosphoric acid and uranium concentrate

2000 ◽  
Vol 88 (9-11) ◽  
Author(s):  
H.T. Fukuma ◽  
E.A.N. Fernandes ◽  
A.L. Quinelato
Keyword(s):  
Solvent Extraction ◽  
Phosphoric Acid ◽  
Half Life ◽  
Pilot Plant ◽  
Acid Production ◽  
Phosphate Rock ◽  
Natural Radionuclides ◽  
Wet Process ◽  
Uranium Concentrate ◽  
Uranium Phosphate

A high-uranium phosphate rock from the Itataia deposit, located in the state of Ceará, Brazil, was milled in a pilot plant for wet-process phosphoric acid production. Further processing with solvent extraction (DEHPA/TOPO) was used aiming to recover uranium from the phosphoric acid. The distribution of natural radionuclides with long physical half-life of the

Recovery of high grade phosphoric acid from wet process acid by solvent extraction with aliphatic alcohols

2010 ◽  
Vol 105 (1-2) ◽  
pp. 115-119 ◽  
Author(s):  
M.I. Amin ◽  
M.M. Ali ◽  
H.M. Kamal ◽  
A.M. Youssef ◽  
M.A. Akl
Keyword(s):  
Solvent Extraction ◽  
Phosphoric Acid ◽  
Aliphatic Alcohols ◽  
High Grade ◽  
Wet Process

scholarly journals Simultaneous recovery of rare earths and uranium from wet process phosphoric acid using solvent extraction with D2EHPA

2018 ◽  
Vol 175 ◽  
pp. 109-116 ◽  
Author(s):  
Shengxi Wu ◽  
Liangshi Wang ◽  
Patrick Zhang ◽  
Hassan El-Shall ◽  
Brij Moudgil ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Phosphoric Acid ◽  
Rare Earths ◽  
Wet Process

scholarly journals One Stage Solvent Extraction Synergism for the Purification of Industrial Wet Process Phosphoric Acid to the Food Grade Quality

2016 ◽  
Vol 4 (4) ◽  
pp. 1554-1564
Author(s):  
Laila A Guirguis ◽  
◽  
Nagwa. I Falila ◽  
Lele H Khalil ◽  
◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Phosphoric Acid ◽  
Food Grade ◽  
Wet Process ◽  
One Stage
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