[article]
| Titre : |
Extraction of proteins from chrome shavings with sodium hydroxide and reuse of chromium in the tanning process |
| Type de document : |
texte imprimé |
| Auteurs : |
Soufiane Tahiri, Auteur ; J. Mabrour, Auteur ; S. Alami. Younssi, Auteur ; M. Azzi, Auteur ; A. Messaoudi, Auteur ; A. Albizane, Auteur ; M. Bouhria, Auteur |
| Année de publication : |
2004 |
| Article en page(s) : |
p. 16-25 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
In this work, the alkaline digestion of chrome shavings with sodium hydroxide was studied. We have demonstrated that the best operating conditions would be about 0.5M for NaOH concentration and 15 minutes for the reaction. The process allows the recovery of proteins in the aqueous phase and the metallic salts in the solid phase (cake). Solid proteins with a high nitrogen percentage and a very low chrome content are recovered after lyophilisation of the liquid. Chemical treatment was used to purify the chrome cake for recycle. The purified chromium was transformed to basic chromic sulfates with basicity 33°S and tanning tests, using cattle hides and goat skins, were carried out to study the tanning capability of the reused product. Characteristics such as chromium oxide content and shrinkage temperature were determined. Apparent quality of obtained leather (penetration of chromium into skins, colouring and firmness of samples in wet blue stage) was also studied. |
| En ligne : |
https://drive.google.com/file/d/1nrzFBJjA3vCK3JW3anaDm2COJ__uXL3W/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4173 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIX, N° 1 (01/2004) . - p. 16-25
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Extraction of proteins from chrome shavings with sodium hydroxide and reuse of chromium in the tanning process in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 1 (01/2004)
