| Titre : |
The development of an integrated rechroming-neutralization-post tanning proces manufacture of upper leathers from goatskins |
| Type de document : |
texte imprimé |
| Auteurs : |
T. Ayyasamy, Auteur ; Palanisamy Thanikaivelan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur |
| Année de publication : |
2005 |
| Article en page(s) : |
p. 71-79 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cuirs et peaux de chèvres
Déchets -- Réduction
Industrie -- Pollution -- Lutte contre
Neutralisation (chimie)
Post-tannage
Rechromage
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
In this study, an integrated rechroming cum neutralisation and post tanning process has been designed to combat the pollution caused by tanning as well as to save resources. Studies on the integration of rechroming and neutralisation reveal that there is no physical deposition of chromium on the leathers at the selected chromium sulphate offer and pH. The process, especially when used for uppers, produces leathers which possess comparable strength and bulk properties to leathers from a conventional multi-step wet finishing process. In particular, the colour and fullness of the leathers are improved.
The developed process leads to significant reduction in pollution loads, COD, TS and chromium loads are reduced by 28%, 34% and 72%, respectively. The quantity of water required is reduced to 5 l/Kg as against 18 l/Kg for processing shaved wet blue goat leathers. The process is shown to be techno-economically feasible. |
| Note de contenu : |
- EXPERIMENTAL METHODS : Control wet finishing process - Integrated wet finishing process
- RESULTS AND DISCUSSION : Integrated rechroming-neutralisation-post tanning process
- Table 1 : Chromium uptake and content in the liquor and leather for varying offer of BCS during rechroming cum neutralisation at a pH of 6
- Table 2 : Visual assessment of the leathers after rechroming cum neutralisation at a pH of 6
- Table 3 : Organoleptic properties of control and experimental crust leathers
- Table 4 : Colour measurement values of control and experimental crust leathers
- Table 5 : Strength characteristics of leathers from integrated (E) and conventional (C) wet finishing processes
- Table 6 : Analysis of composite liquor from integrated (E) and conventional (C) wet finishing processes
- Table 7 : Comparison of water consumption and discharge for control (C) and experimental (E) wet finishing of 1 kg shaved wet blue
- Table 8 : Power consumption for control (C) and experimental (E) wet finishing |
| En ligne : |
https://drive.google.com/file/d/1YlbnoGPAZnnZqI2OUpNxkrfONA168ITb/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39597 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 2 (03-04/2005) . - p. 71-79
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The development of an integrated rechroming-neutralization-post tanning proces manufacture of upper leathers from goatskins in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 2 (03-04/2005)
