| Titre : |
Managing chrome in leather manufacture |
| Type de document : |
texte imprimé |
| Auteurs : |
Jürgen Christner, Auteur ; Florian Doeppert, Auteur ; Jens Fennen, Auteur ; Jan-Tiest Pelckmans, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 409-415 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Additifs
Antioxydants
Chrome hexavalent
Formaldéhyde -- Elimination
Polysulfonique, Acide
Retannage
Tannage -- Aspect de l'environnement
Tannage au chrome
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Chrome Tanning, being still the most used tanning method, has been challenged more and more in the recent past. The main reasons were questions of sustainability and the fact that chromium VI can be formed in leathers tanned with chromium III compounds. From a technical point of view, many solutions exist for using the chrome tanning agent in a most economical and ecological way. In this paper another way is shown for maximizing the distribution of chromium in the cross section of the hide as well as the exhaustion of chromium from tanning float, thus reducing the total chromium emission into the environment. Also the leaching of chrome from wet blue during retanning operations will be considered. The type of chemicals used and the process conditions play an important role in this regard, as well as the type of chrome tannage used to manufacture the wet blue. Various measures and solutions will be discussed in this presentation. The role of chromium VI in tanning is looked at with special attention to the real risks associated with it. Finally the formation of chromium VI will be discussed as well as methods to prevent its formation. A new additive (anti oxidant), which is able to eliminate existing chromium VI and reduce the likelihood of reformation, will be introduced. |
| Note de contenu : |
- Emission of chromium into the environment
- Pickling and tanning with polysulphonic acids (PA)
- Chromium exhaustion and fixation in the wet-end processes
- Strategies for treating chrome containing waste floats
- Chromium toxicity, prevention of chromium (VI) in the wet end |
| En ligne : |
https://drive.google.com/file/d/1ewCz1iVwEd6ahu0z6oJxE-8ks3AUo9Ur/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16746 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVII, N° 12 (12/2012) . - p. 409-415
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