| Titre : |
Isolation and characterization of a low affinity chromium(III) complex in chrome tanning solutions |
| Type de document : |
texte imprimé |
| Auteurs : |
Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur ; T. Ramasami, Auteur |
| Année de publication : |
1997 |
| Article en page(s) : |
p. 234-238 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
A mixture of aquo complexes of chromium(III) is used for tanning. These complexes vary in their nature and reactivity to the protein.The present investigation deals with the understanding of the nature of the chromium(III) complexes present in spent chrom etanning solutions. An ion exchange chromatography technique has been employed for the isolation of the various complexes from fresh and spent tanning solutions. These studies indicated the presence of low affinity species to the extent of 45 % of the total chromium in the spent solution. The low affinity chromium(III) complex was characterised by UV-visible spectroscopy, charge per atom, charge per species, degree of polymerisation and hydroxyl per chromium and has been established to be a cyclic tetrapositive tetrameric species with unusual reactivity. |
| En ligne : |
https://drive.google.com/file/d/1URmlG2ykeb_ioCt3BenwyySXA2clJf_I/view?usp=share [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7954 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 81, N° 6 (11-12/1997) . - p. 234-238
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Isolation and characterization of a low affinity chromium(III) complex in chrome tanning solutions in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 6 (11-12/1997)
