this work was aimed to evaluate and compare the performances of the solvents d2ehpa (di-(2-ethylhexyl) phosphoric acid), cyanex 272 (bis (2,4,4-trimethylpentyl) phosphinic acid), and a mixture system of d2ehpa and cyanex272 in the separation of some rare earth elements (rees) including lanthanum, gadolinium, neodymium, and dyspersym from a nitric acid solution. the results obtained showed that ...

Cationic dye (Methylene blue) was extract from waste water by using emulsified liquid membrane process. The composed of two phases: organic and aqueous. D2EHPA, SPAN 80 acid are the composition aqueous phase, however fuel oil represent phase. effect different parameters such as initial concentration cationic (MB), addition salt (KCl/ NaCl/ Na2SO4), (HCl/ H2SO4/H3PO4) extractant (10, 30 50 ppm) ...

In this study, a hydrometallurgical treatment involving the solvent extraction and recovery of some heavy metals from a sulphuric acid leach solution of galvanic sludge, using di-(2-ethylhexyl)-phosphoric acid (D2EHPA) and bis-(2,4,4-trimethylpentyl)-phosphinic acid (Cyanex 272), both diluted in kerosene, has been investigated. The preliminary tests revealed the necessity to remove other metal ...

The liquid-liquid extraction of Ti(IV) from perchlorate media using, di(2-ethylhexyl) phosphoric acid (D2EHPA) and 2-ethylhexyl prosphonic acid mono-2-ethylhexyl ester (PC-88A) in toluene as the extractant was studied. Quantitative extraction of Ti(IV) was observed in the lower acidity range of 0.01 to 0.1 mol dm-3 with 0.003 mol dm-3 D2EHPAand 0.01 mol dm-3 PC-88Ain toluene, respectively, and ...

Purification of concentrated manganese sulfate solution by solvent extraction is discussed in this paper. The use bis(2-ethylhexyl) hydrogen phosphate (D2EHPA) and bis(2,4,4-trimethylpentyl)phosphinic acid (BTMPPA) was studied removal impurities from zinc electrowinning anode sludge leachates. Over 99 % iron were removed both extractants at around pH 3 two mixer-settlers operating continuous co...

A significant amount of iron from the waste nickel-cadmium (Ni-Cd) battery sulfuric acid leachate seriously hinders separation and recovery nickel cadmium. Therefore, an efficient economical way to remove this is desired. This paper demonstrated extraction a simulated Ni-Cd with saponified Di (2-ethylhexyl) phosphoric (D2EHPA). The iron-loaded D2EHPA was then stripped oxalic recovered in form o...

The stability of an emulsified liquid membrane composed of Span80 as a surfactant, D2EHPA as an extractant and sulfuric acid as an internal phase was first studied according to different diluents and many operating parameters using the Plackett-Burman design of experiments. Then the removal of methylene blue from an aqueous solution has been carried out using this emulsified liquid membrane at ...

This work was aimed to evaluate and compare the performances of the solvents D2EHPA (Di-(2-ethylhexyl) phosphoric acid), Cyanex 272 (bis (2,4,4-trimethylpentyl) phosphinic acid), and a mixture system of D2EHPA and Cyanex272 in the separation of some rare earth elements (REEs) including lanthanum, gadolinium, neodymium, and dyspersym from a nitric acid solution. The results obtained showed that ...