Polyfunctional Derivatives of Imidodiphosphoric Acid as Extractants

1997 ◽  
Vol 62 (4) ◽  
pp. 620-625 ◽  
Author(s):  
Oldřich Navrátil ◽  
Petr Sládek ◽  
Alena Tokárová ◽  
Eckhard Herrmann ◽  
Moein Nouaman
Keyword(s):  
Aqueous Phase ◽  
Distribution Ratio ◽  
Alkaline Earth ◽  
Functional Group ◽  
Extraction Efficiency ◽  
Ester Group ◽  
Alkaline Earth Metals ◽  
Strontium Barium ◽  
Extraction Constants ◽  
Derivatives Of

The distribution of calcium, strontium, barium and scandium between aqueous and organic phases was studied using 0.1 M HNO3 or 0.01 to 0.1 M HCl as the aqueous phase and solutions of selected derivatives of organophosphoric reagents containing the conventional =P(O)NHP(O)= bifunctional group or the analogous trifunctional or tetrafunctional group in various organic solvents as the organic phase. The effect of substitution of one ester group by an OH or NH2 group was examined. While for the alkaline earth metals the distribution ratio increases if the bifunctional group is replaced by a higher-functional group, the reverse is true for scandium. The extraction efficiency is improved by the presence of OH or NH2 substituent groups. The composition of the extracted species was inferred by logarithmic analysis and the corresponding extraction constants were calculated.

scholarly journals Extraction properties of β-aminophosphine oxides towards lanthanides and alkaline earth metals

2012 ◽  
Vol 10 (6) ◽  
pp. 1933-1941 ◽  
Author(s):  
Ekaterina Matveeva ◽  
Elena Sharova ◽  
Alexander Turanov ◽  
Vasilii Karandashev ◽  
Irina Odinets
Keyword(s):  
Ionic Liquid ◽  
Metal Ions ◽  
Phosphine Oxide ◽  
Separation Factor ◽  
Alkaline Earth ◽  
Extraction Efficiency ◽  
Alkaline Earth Metals ◽  
Neutral Media ◽  
Extraction Properties

AbstractThe investigation of the extraction properties of a series of polyoligodentate β-aminophosphine oxides 1–8 bearing from one to six phosphine oxide groups in a molecule towards Ln(III) and alkaline earth metals ions from neutral media has revealed that, using common diluents, the extraction efficiency increases with an increase of a number of P=O functions in a ligand. The addition of ionic liquid, namely 1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide ([bmim][NTf2]), significantly increasing the extraction efficiency and application of IL concentration of 0.05 M (in 1,2-dichloroethane) providing the maximum recovery of metal ions with Lu/La separation factor reaching up to 91. Hexapodal tris[bis(2-diphenylphosphorylethyl)aminoethyl]amine 8 demonstrates the highest extraction under all conditions applied and the separation factor for U and Eu of this compound exceeded 103.

Novel triphenyltin substituted derivatives of heavier alkaline earth metals

2000 ◽  
Vol 613 (2) ◽  
pp. 139-147 ◽  
Author(s):  
Ulrich Englich ◽  
Karin Ruhlandt-Senge* ◽  
Frank Uhlig*
Keyword(s):  
Alkaline Earth ◽  
Alkaline Earth Metals ◽  
Derivatives Of

Enhanced Resource Recovery by Beneficiation and Direct Acid Leaching of Fly Ash

1986 ◽  
Vol 86 ◽  
Author(s):  
E. E. Berry ◽  
R. T. Hemmings ◽  
D. M. Golden
Keyword(s):  
Alkaline Earth ◽  
Extraction Efficiency ◽  
Fine Fraction ◽  
Acid Leaching ◽  
Alkaline Earth Metals ◽  
Magnetic Fraction ◽  
Mineral Beneficiation ◽  
Si Content ◽  
Extractable Al ◽  
Soluble Components

ABSTRACTAn investigation was conducted into the use of beneficiated ash fractions as feed materials for direct acid leaching to recover Al and other metals. A low-Ca (1.4% CaO) ash was selected from which four fractions (classifier fines, classifier rejects, magnetic concentrate, and non-magnetics) were produced by mineral beneficiation methods. The raw ash and the four ash fractions were leached with 6 M HCl under reflux. Mass balance data were obtained to determine extraction efficiency for Si, Al, Fe, Ca, Mg, Na, K and Ti. It was found that size separation of the ash had a marked influence in enhancing extraction efficiency from the fine fraction for all of the elements studied except Fe. Extraction of Fe from the magnetic fraction was less efficient than from the non-magnetic fraction. Examination of the solid residue after leaching showed that, although most of the acid-soluble components were removed from the glassy phases of the ash, a significant part of the ash comprised non-reactive glass of high-Si content. A relationship between extractable Al in ash and leachable alkali and alkaline earth metals was identified and discussed in terms of glass modification theory.

The Influence of Co-Existing Ions on Adsorbs in the Aqueous Phase Pb 2+ by Bacillus mucilayinosus

2011 ◽  
Vol 183-185 ◽  
pp. 1451-1455
Author(s):  
Dong Qin Zhou ◽  
Shu Juan Dai ◽  
De Zhou Wei ◽  
Shu Yong Yang
Keyword(s):  
Aqueous Phase ◽  
Alkaline Earth ◽  
Adsorption Process ◽  
Ph Value ◽  
Water Solution ◽  
Alkaline Earth Metals ◽  
Electrostatic Attraction ◽  
Ionic Exchange ◽  
Adsorption System ◽  
Biological Surface

There are many factor influences on adsorption-flotation results to Pb2+ among, in the solution. The effect of co-existing alkaline-earth metals ions was examined by using Bacillus mucilayinosus as the absorbent on the condition of different pH value, the coexistence ion amount used as well as in tri-, four-, five-, six-coexistent ion systems, to absorbed water solution in Pb2+ ion .The adsorption the biological surface zeta - the potential shift, indicated the Bacillus mucilayinosus to the Pb2+ adsorption process in, the electrostatic attraction occupies the leadership, but in the multi-dimensional coexistence adsorption system, has the competition adsorption and the ionic exchange.

Sign in / Sign up

Export Citation Format

Share Document