Anion exchange extraction

ANION-EXCHANGE EXTRACTION OF ZINC THIOCYANATE COMPLEXES BY NON-SYMMETRIC QUATERNARY AMMONIUM SALTS... [Pg.275]

In this work, the results of study of zinc thiocyanate complexes anion-exchange extraction by non-symmetric QASes in toluene ai e discussed. The non-symmetric QASes have the common formula [(C,3H g03)N(CH3) (C,H Q3 J-X-, where C,3H3 03 - highly lipophilic substituent, (2, 3, 4-tn. s-dodecyloxy)benzyl. It was found that exchange... [Pg.275]

The applications of hydrophobic amine salts (see Table 5) as anion exchange extractants to recover a diverse range of metals in the form of anionic, usually chloro, complexes was reviewed4 in CCC (1987). The order of preference shown by this class of extractants for simple inorganic anions... [Pg.774]

Table 5 Commercially available anion exchange extractants.

The ammonia scrubbing of loaded anion exchange extractants, e.g., [R3NH]2[ZnCl4](org), proceeds similarly (see also Section 9.17.5.1.2), and thus in each case the mixed extractant system achieves the overall process,... [Pg.785]

In the late 1980s Henkel Coporation131 developed a series of dialkylguanidine derivatives (31) for the recovery of Au and Ag from low-grade cyanide liquors. The dialkylguanidinium cation [RH]+ functions as an anion exchange extractant whose concentration is controlled by the pH swing ... [Pg.792]

Evidently, the capability of cation-exchange and anion-exchange extraction, makes a great difference between ILs and conventional solvents. From a practical viewpoint, it may be both a benefit and a disadvantage, depending on the particular task. [Pg.257]

In some electrolytic solutions, especially those strong in halides, many metal eations are complexed by anions to the extent that they exist primarily as neutral ion pairs or anionic species. The formation of anionic complexes may retard metal extraction by solvation or cation exchange, but it can be exploited by use of anion-exchanging extractants. [Pg.474]

TABLE 8.2-4 Hydro metallurgical Applications of Some Common Anion-Exchanging Extractants... [Pg.475]

Fasching, C.E. Peterson, L.R. Anion-exchange extraction of cephapirin, cefotaxime, and cefoxitin from serum for liquid chromatography. Antimicrob.Agents Chemother., 1982, 21, 628-633... [Pg.283]

This type of unit has been operated on a near commercial scale for the anion-exchange extraction of uranium from sulphuric add leach liquors. For this purpose it is claimed to operate satisfactorily even in the presence of finely ground particles of ore, thus saving a filtration stage. [Pg.97]

Anion-exchange extractants (long-chain alkylamines)... [Pg.173]

In addition to this anion-exchange extraction reaction, the irreversible formation of inner-sphere amine complexes can occur (Nicol et al. 1987) ... [Pg.177]

Anuiiotic fluid for lipid extraction, 690 Amoxicillin, 448-452 Ampicillin, 446-448 Anion exchange extraction, 14 Anions, detection and identification of, 520 Anthocyanins, 722-727 distribution, 723 practical experiments, 725-727 structure, 722-723... [Pg.1091]

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