Extraction

Abstract

Extraction by various substituted anilides (CH3, N02, -OC2H6, Cl)Mercaptoacetic, -propionic, -succinic acids and their substituted anilides. Catechol and its 3,5-Mo(V, VI)Extraction study. Anionic Mo chelates extract Table I. (Continued) System Metal Ions Special information References DOPA Fe, Mo Extraction equil. 0, AS0, AF°. Extracted species FeA2-HA, Mo02A2 -2HA (459) DOPA Tb, Eu Extraction equil. Role of diluent (506) DOPA Ce Extraction equil. Extracted species CeA4 or at pH 1.7, Ce02A2 (1012) DOPA La, Eu, Lu, Am Extraction and aqueous chloride complex equil. Table I. (Continued) System Metal ions Special information References Valeric to lauric acids Zr Extraction depends on order of addition. Extd. species colloidal (666) Caproic acid Fe Role of pH in extraction (559, 560) Pivalic acid Cu (377) C7-C9 carboxylic acids Alkali metals Extraction equilibria K > Cs > Na > Li (648) C7-C9 carboxylic acids La, Pr, Nd, Gd Extraction decreased with deer. H-bonding of solvent (789) C7-C9 carboxylic acids Mg, Mn, Al, Fe, Th, U (646) C7-C9 carboxylic acids Zr Extraction solvents decrease C6H6N02 > CHCI3 > C6H6 > C,H,6 > Et20 > MIBK > EtOAc. Equilibration takes over week Table 1. (Continued) System Metal ions Special information References Dibutyl-Ar,Ar-diethyl carbamoylmethylene phosphonate Ce, Pm, Am Nitrate system. Extractions are about 100 X that with TBP

Molecular modeling study of the aggregation behavior of nickel(II), cobalt(II), lead(II) and zinc(II) bis(2-ethylhexyl) phosphate complexes

“…Alkyl phosphorus acids are the most widely used acidic extractants [2][3][4]. Bis (2-ethylhexyl) phosphoric acid (HDEHP), bis(2-ethylhexyl) phosphinic acid (Cyanex ® 272) and bis(2-ethylhexyl) dithiophosphoric acid are some of the alkyl phosphorus acids extractants which are employed in extraction of metal ions [5]. In particular, HDEHP has been extensively used for the extraction of metals such as uranium, lanthanides, nickel, cobalt, zinc and other divalent transition metals [6][7][8].…”

Concentration of trace metals by solvent extraction and their determination by atomic absorption spectrophotometry

“…ligand has been reported to enhance the extraction (Freiser, 1968) and may provide a broader range of pH for optimum extraction efficiency in many cases. Thus, pH conditions were studied using a mixture of diphenylthiocarbazone, 8-quinolinol, and acetyl acetone in ethyl propionate.…”

Inorganic and geological materials

“…Solvent Extraction. Solvent extraction was last reviewed in Analytical Chemistry in the Fundamental Review of 1968 (69). Although numerous other reviews and books have appeared in the literature since that time, the most useful tables provided by Freiser are sorely missed.…”