| Titre : |
Transposition of chrome tanning in leather making |
| Type de document : |
texte imprimé |
| Auteurs : |
Chao Wu, Auteur ; Wenhua Zhang, Auteur ; Xuepin Liao, Auteur ; Yunhang Zeng, Auteur ; Bi Shi, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
p. 176-183 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Absorption
Cuirs et peaux -- Propriétés mécaniques
Eau -- Consommation -- Réduction
Eaux usées -- Analyse
Morphologie (matériaux)
Oxydes de chrome
Post-tannage
Procédés de fabrication
Récupération (Déchets, etc.)
Stabilité hydrothermale
Tannage au chrome
Tannage organique
Wet-white (tannage)
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
To avoid the release of chrome from leather into post tanning effluents and the generation of chrome shavings, an inverse chrome tanning technology based on wet white was investigated. Conventional bated pelt was firstly tanned using an amphoteric organic tanning agent (Tingjiang white tanning agent, TWT) without pickling. Then, the TWT tanned wet white was directly processed with conventional post tanning processes. Chrome tanning was transposed to the end of the post tanning. The wet white had a shrinkage temperature (Ts) around 85°C that met the needs of shaving operation, and did not generate chrome shavings. The Ts and Cr2O3 content of the leather, by using this inverse chrome tanning technology, were higher than those of the conventional chrome tanned leather. With this inverse technology, the chrome output was reduced by 48%, mainly because no chrome was released from leather in post tanning processes. Meanwhile, the volume of chromium-containing wastewater discharged from the inverse processes was barely 31% of that from the conventional processes, which makes it much easier to collect and recover chromium from the effluents. Additionally, the tensile strength, tear strength and general appearances of the leather produced by the inverse technology were comparable to those of the conventional chrome tanned leather. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Leather making processes - Analyses of leather properties (Hydrothermal stability - Distribution of chrome in leather - Morphology of leather - Physical properties) - Analyses of effluents (Total organic carbon concentration (TOC) - Concentration of chrome in effluents
- RESULTS AND DISCUSSION : pH change in leather making processes - Content and distribution of Cr2O3 in leather - Discharge of chrome from leather making processes - Absorption capacity of leathers of retanning and fatliquoring chemicals - Morphology in leathers -Physical properties of leathers |
| En ligne : |
https://drive.google.com/file/d/1uviZiCwz4VgYvS-NNEWcomxG72XyP5nM/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21515 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIX, N° 6 (06/2014) . - p. 176-183
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Transposition of chrome tanning in leather making in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 6 (06/2014)
