Cation exchanger sulfonated

As mentioned, this review is focused primarily on a survey of the vast literature dealing with the structure and properties of Nafion in the sulfonic acid and cation exchanged sulfonate forms. The literature on the carboxylate version is sparse and currently of lesser interest, as its application seems to be limited to membranes in chlor-alkali cells, and since it is a... 

On cation exchangers (sulfonic acid-type and carboxylic acid-type), a value of = 0.0089 cm. i was observed, corresponding to the hydrated Mn(H20)6++. The effect of axial symmetry (D 9 0) was observed as evidenced by a fine structure in the hyperfine lines. A value of D however was not determined. The EPR spectrum of Mn++ on an anion exchanger studied consisted of a single unresolved broad line. A smaller A value and larger... 

Polymethacrylate Strong cation exchanger (sulfonic acid) ProSwift sex Dionex Corporation 50x4.6mm 50x 1 mm Ion exchange chromatogr hy of proteins... 

Strongly acidic cation exchange Sulfonated polystyrene 1-14 Inorganic and organic cations, B vitamins, peptides, amino acids, lanthanide series... 

As a general rule, the maximum values of available capacity vary from 1.2 mmol/g (silica having a specific area close to 400 m /g) to 5 mEq/g for the cation exchanger (sulfonate groups). 

In this way Consden et al. (1948) and Drake (1947) separated glutamic and aspartic acid on columns of Amberlite IR.-4 (polyamine anion exchanger) maintained at pH 2.5, and this type of column has been used to separate acidic peptides from a wool hydrolyzate (Consden et al., 1949). More recently Stein and Moore (1949) have obtained excellent fractionations of amino acids on columns of Dowex-50 (cation exchanger, sulfonic acid groups) developed with 1.5-4 N HCl. The separations obtained are almost certainly due to differences in adsorption affinity for the resin, as well as to charge effects. At the pH used the only partially... 

Redistribution of mixtures of Pb(CH3)4 and Pb(C2H5)4 is performed also in the presence of a trialkyllead salt of a cation exchange sulfonate resin at 60°C in 3 h to give an equilibrium mixture of the appropriate tetraalkyllead compounds [49]. Also various metal salts of a strongly acidic cation exchange resin can be employed as catalysts for the redistribution of Pb(CH3)4 and Pb(C2H5)4 at 50 °C [52, 57, 58]. 

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