Studies on the solvent extraction of metal perchlorates III. Extraction equilibria of alkaline earth ions with trioctylphosphine oxide as perchlorate and thiocyanate.
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概要
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Solvent extraction of alkaline earth metal ions in 1 mol dm<SUP>−3</SUP> sodium perchlorate or thiocyanate aqueous solution with trioctylphosphine oxide (TOPO) in hexane was studied at 25 °C. The extraction in both systems improved in the order: beryllium(II)>calcium(II)>strontium(II)\simeqmagnesium(II)\simeqbarium(II). When the TOPO concentration was the same, the extraction of beryllium or calcium thiocyanate was better than that of the perchlorate, that of magnesium or strontium thiocyanate was nearly similar to that of the perchlorate, while barium perchlorate was extracted better than its thiocyanate. From these results it was concluded that these five perchlorates and strontium and barium thiocyanates were extracted as ion-pairs, [M(topo)<SUB>4</SUB>]<SUP>2+</SUP>(X<SUP>−</SUP>)<SUB>2</SUB>, (X<SUP>−</SUP>=ClO<SUB>4</SUB><SUP>−</SUP> or SCN<SUP>−</SUP>), while beryllium thiocyanate was extracted as solvates of noncharged complexes, M(SCN)<SUB>2</SUB>(topo)<I><SUB>n</SUB></I>, (<I>n</I>=2 and 3), and that magnesium and calcium thiocyanates in the organic phase (<I>n</I>=3 and 4) should have both ionic and coordinative properties. The poor extraction of magnesium salts was assumed to be due to their strong hydration.
- 公益社団法人 日本化学会の論文
著者
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Sekine Tatsuya
Departemnt of Chemistry, Science University of Tokyo
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Kusakabe Satoshi
Departemnt of Chemistry, Science University of Tokyo
関連論文
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- Effect of the Hydrophobic Anion of Picrate on the Extraction of Europium(III) with Diamide
- Solvent Extraction of Copper(I) and Copper(II) from Aqueous Halide Solutions with Tetrabutylammonium Ions into Chloroform
- SOLVENT EXTRACTION OF CADMIUM(II) FROM THIOCYANATE SOLUTIONS WITH METHYLISOBUTYLKETONE AND TRIOCTYLPHOSPHINE OXIDE IN HEXANE
- Rate and Equilibrium of the Distribution of 2-Thenoyltrifluoroacetone in Carbon Tetrachloride-Aqueous Perchlorate Solution Systems
- On the extractability of univalent cation as dibenzo-18-crown-6 complexes with picrate ion.
- Mutual and Acid Distribution in Methyl Isobutyl Ketone-Water System
- Distribution of Aqueous Sodium Perchlorate into Some Polar Organic Solvents
- The stability constants of nickel(II) complexes with chloride, thiocyanate, sulfate, thiosulfate, and oxalate ions, as determined by a solvent extraction method.
- Extraction of nickel(II) in aqueous thiocyanate-perchlorate solutions with trioctylphosphine oxide in hexane and with 4-methyl-2-pentanone.
- The formation and extraction equilibria of several manganese(II) .BETA.-diketonates and their trioctyl-phosphine oxide adducts.
- The Distribution of 2-Thenoyltrifluoroacetone between Several Organic Solvents and an Aqueous Solution and Its Extraction of Sodium (I) into Methyl Isobutyl Ketone
- Adduct formation of the mixed copper(II) 2-thenoyltrifluoroacetonate-3-isopropyltropolonate chelate with tributyl phosphate in solvent-extraction systems containing these ligands.
- Ion association of tetrabutylammonium halides in 1,1- and 1,2-dichloroethane and 4-methyl-2-pentanone.
- Studies of the Alkaline Earth Complexes in Various Solutions. V. Calcium(II) and Strontium(II) Complexes with Carbonate Ions in 1M Sodium Chloride Media
- Rate of solvent extraction of chromium(III) with acetylacetone into carbon tetrachloride.
- Solvent extraction of iron(III) in concentrated nitric acid with several .BETA.-diketones.
- Extraction of lead(II) in aqueous thiocyanate-perchlorate solutions wtih trioctylphosphine oxide in hexane and with 4-methyl-2-pentanone.
- Studies on the solvent extraction of metal perchlorates III. Extraction equilibria of alkaline earth ions with trioctylphosphine oxide as perchlorate and thiocyanate.
- Association of .BETA.-diketones with trioctylphosphine oxide in solvent extraction systems.
- Solvent extraction equilibria of acids. VI. The extraction of several mono- and dicarboxylic acids with trioctylphosphine oxide in hexane.
- Solvent extraction equilibria of thallium(III) from weakly acidic chloride solutions into 4-methyl-2-pentanone.
- The Solvent Extraction of Zinc(II) in Sodium Perchlorate-halide Solutions with Trioctylphosphine Oxide
- Rate of ligand exchange of tris(acetylacetonato)iron(III) with 2-thenoyltrifluoroacetone in organic solvents.
- Solvent extraction equilibria of acids. VII. The co-extraction of water with strong mineral acids by trioctylphosphine oxide.
- A Study of Silver(I) Complexes with Some π-Donors and n-Donors in Chloroform by the Solvent Extraction Method
- Kinetic Studies of the Solvent Extraction of Metal Complexes. II. The Rate of the Extraction of Iron(III) with Thenoyltrifluoroacetone into Carbon Tetrachloride
- Kinetic Studies of the Solvent Extraction of Metal Complexes. I. The Extraction of the Beryllium(II)-TTA Chelate from Aqueous Perchlorate Media into Carbon Tetrachloride and Methyl Isobutyl Ketone
- Formation of Zinc(II) Complexes with Several Carboxylic Acids and Their Extraction with Carbon Tetrachloride
- The Solvent Extraction of Iron(III) in Perchlorate Solutions Containing Chloride or Bromide Ions with 2-Thenoyltrifluoroacetone and Trioctylphosphine Oxide
- The solvent extraction of thallium(I) as a dibenzo-18-crown-6 complex with the picrate ion.
- Studies on the solvent extraction of metal perchlorates. II. Extraction of alkali metal perchlorates with trioctylphosphine oxide.