Molecular Sorption on Ion Exchange Resins

Bafna, S. L.; Govindan, K.

doi:10.1021/ie50554a040

Cited by 12 publications

(7 citation statements)

References 4 publications

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“…The adsorption capacity thus increased with the length of the carbon chain in the series of aliphatic carboxylic acids of similar pKa. A similar tendency was also observed in the adsorption of carboxylic acids by the strong base anion-exchange resins (Semmens and Gregory, 1974; Pochhali et al, 1977Pochhali et al, ,1978 and that by strong and weak acid cation-exchange resins (Bafna and Govindan, 1956). The increase of affinity with the poly(vinylpyridine) and other resins may arise from the decrease of solubility of carboxylic acids in water.…”

Section: Resultssupporting

confidence: 52%

“…Synthetic resins such as styrene-divinylbenzene resin (Gustafson et al, 1968), strong base anion-exchange resin (Gregory and Semmens, 1972;Semmens and Gregory, 1974; Pochhali et al, 1977Pochhali et al, ,1978, and strong and weak acid cation-exchange resins (Bafna and Govindan, 1956; Reichenberg and Wall, 1956) have been used to adsorb carboxylic acids in aqueous solution. In the first paper of this series (Kawabata and Ohira, 1979), it was pointed out that vinylpyridine-divinylbenzene copolymer was found to have an excellent capacity for the adsorption of phenol and was efficiently regenerated by an organic solvent as the eluant.…”

Section: Introductionmentioning

confidence: 99%

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Removal and recovery of organic pollutants from aquatic environment. 4. Separation of carboxylic acids from aqueous solution using crosslinked poly(4-vinylpyridine)

Kawabata¹,

Yoshida²,

Tanigawa³

1981

Ind. Eng. Chem. Prod. Res. Dev.

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Section: Resultssupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Removal and recovery of organic pollutants from aquatic environment. 4. Separation of carboxylic acids from aqueous solution using crosslinked poly(4-vinylpyridine)

Kawabata¹,

Yoshida²,

Tanigawa³

1981

Ind. Eng. Chem. Prod. Res. Dev.

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“…These conclusions have been questioned. 82 Oxidative and hydrolytic degradation of amylose in solution by y-radiation is found to be accompanied by the production of small fragments of the molecule and of acidic group^.^…”

Section: Non-aqueousmentioning

confidence: 99%

“…A stable free radical obtained by the oxidaton of the condensation product of acetone with phenylhydroxylamine gives a well-defined inhibition period in styrene polymerisation, and the products do not affect the reaction, but the stoicheiometry during the inhibition period is uncertain. 82 Transfer constants with eleven solvents have been measured for the polymerisation of methyl acrylate. These are found to be consistently higher than those obtained with methyl methacrylate, possibly owing to a steric effect.…”

Section: Retardation and Inhibitionmentioning

confidence: 99%

“…80 In an extension of earlier work 81 it has been shown that there is a good correlation between the electrical conductivity of silica-alumina catalysts and the small amounts of sodium present in the catalyst. 82 The increased conductivity associated with increased alumina is now attributed to the extra sodium introduced. No increase was observed on introducing potassium.…”

Section: Adsorption and Heterogeneous Catalysismentioning

confidence: 99%

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General and physical chemistry

Pullin¹,

Baxendale²,

Colclough³

et al. 1956

Annu. Rep. Prog. Chem.

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GENERAL AND PHYSICAL CHEMISTRY.for higher vibrational states. Linnett lo has discussed the internuclear distances and force constants of a number of diatomic molecules in terms of the number of electrons in the bonding region and the 0 or x character of the electrons. There are still few accurate vibrational data for isotopically substituted molecules other than for deuterium substitution. Such data are necessary to evaluate the force constants of the most general quadratic potential-energy function. Thus, for bent XY, molecules, while three fundamental frequencies can be observed there are two primary and two interaction force constants to be evaluated. Smith and Linnett l1 have discussed the relation between these when the three frequencies are known, for a number of molecules of this type, and have indicated ways in which, in the absence of isotopic data, one of the force constants can be estimated, so fixing approximately the values of the others. Besides providing more reliable values of the primary constants the interaction constants provide results of direct chemical interest as they may often be related to electronic changes in one bond caused by stretching or bending another. Smith and Linnett l1 suggest that the compression of the lone pairs may contribute to the bending constant in such molecules as 0,, NO,-, etc. Simpson l2 has pointed out that potential-energy terms linear in angle may occur for the out-of-plane vibrations of planar molecules and that such terms are likely to be important where interatomic repulsion is large.Vibration-Rotation Spectra.-Numerous vibration-rotation spectral studies have been published. Molecules studied include NO l3 (re = 1.1506 A), CS, l4 (CS r, 1.553 A), N,O l5 (the four constants in the quadratic potential-energy expression obtained), HCN and DCN 16-l7 (complete set of vibrational anharmonic constants calcdated),17 0, 18* l9 (with a determination l9 of the four quadratic potential-energy constants from combined use of infrared data and measurements by microwave spectroscopy of centrifugal distortion effects), D,O and HDO 2o (in great detail), H2S 21 (re-assignment of strong absorption round 2600 cm.-l to vl), H2Te,22 CD,F 23* 24 (compared with that in methane, the C-H bond is lengthened and the HCH angle enlarged 23) , C10,F 25 (symmetric top), allene,26* 27* 28 and deuterated allenes 27* 28 (infrared 26, 28 and Raman 27 studies).

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Abhängigkeit der Ionenaustauscher‐Eigenschaften von der chemischen Struktur

Blasius

Janzen

1975

Chemie Ingenieur Technik

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Es wird eine Übersicht über die Eigenschaften von Ionenaustauschern auf Kunstharz‐Basis, ihre Wirkungsgruppen und Strukturen sowie den dadurch bedingten praktischen Einsatz anhand von Beispielen aus der Literatur und aus eigenen Arbeiten gegeben. Behandelt werden nach einer kurzen geschichtlichen Einführung stark saure Kationen‐Austauscher und stark basische Anionen‐Austauscher, schwach saure Kationen‐Austauscher und schwach basische Anionen‐Austauscher, chelatbildende Austauscher, Austauscher mit makrocyclischen Polyäthern als Ankergruppe, flüssige Austauscher, optisch aktive Austauscher und Adsorberharze. Eine Schlußbetrachtung weist auf die Herstellung im industriellen und labormäßigen Maßstab und einige Anwendungsmöglichkeiten der Austauscher mit makrocyclischen Polyäthern als Ankergruppen hin.

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Molecular Sorption on Ion Exchange Resins

Cited by 12 publications

References 4 publications

Removal and recovery of organic pollutants from aquatic environment. 4. Separation of carboxylic acids from aqueous solution using crosslinked poly(4-vinylpyridine)

Removal and recovery of organic pollutants from aquatic environment. 4. Separation of carboxylic acids from aqueous solution using crosslinked poly(4-vinylpyridine)

General and physical chemistry

Abhängigkeit der Ionenaustauscher‐Eigenschaften von der chemischen Struktur

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