[article]
| Titre : |
Processing of collagenic residues. Isolation of gelatin by the action of peroxochromates |
| Type de document : |
texte imprimé |
| Auteurs : |
Jaime Cot, Auteur ; Albert M. Manich, Auteur ; Agusti Marsal, Auteur ; Maria Fort, Auteur ; Pedro J. Celma, Auteur ; Robert Carrio, Auteur ; Rigoberto Choque, Auteur ; Luisa F. Cabeza, Auteur |
| Année de publication : |
1999 |
| Article en page(s) : |
p. 115-128 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The experience of our research group with topics related to the dechroming(III) to chromium(VI) by peroxides in alkaline conditions, allowed us to know in-depth the reaction mechanisms. The formation in situ of some peroxochromates (containing up to 2,5 groups peroxo for each atom of chromium), unstable and with a great owidizing potential, is fundamental in the process of gelatin isolation. It has been demonstrated that the chromium-containing collagenic wastes that had bee previously dechromed by this method produce a gelatin with better yield, quality and in a much shorter treatment, compared with conventional methods described in the literaure. The residual chrome content in the gelatin can be eliminated using tangencial ultrafiltration and the reverse osmosis techniques. Furthermore, the chromium (VI) is recovered by ion-exchange resins and can be re-used in tanneries. Finally, physico-chemical characteristics of the isolated gelatins were evaluated. |
| Note de contenu : |
- EXPERIMENTAL : First experimental design - Second experimental design - Activity of the peroxochromates generated in situ
- RESULTS AND DISCUSSION : Applications of the isolated gelatin - Future perpectives |
| En ligne : |
https://drive.google.com/file/d/1mf5XWt0cvDqFdzZhQVdLcmbnTosrgp3h/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4455 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIV, N° 4 (06/1999) . - p. 115-128
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