| Titre : |
Non-polar medium enables efficient chrome tanning |
| Type de document : |
texte imprimé |
| Auteurs : |
Palanisamy Thanikaivelan, Auteur ; Selvaraj Silambaransan, Auteur ; Rathinam Aravindhan, Auteur ; Jonnalagadda Raghava Rao, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 338-346 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Heptane
Solvants écologiques
Tannage au chrome
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Converting raw hides and skins into leather through chrome tanning in water medium creates huge environmental burden by contaminating the precious water resource on the one hand and discharging more chromium on the other. Here, a non-polar green solvent, heptane, alternate to water has been evaluated for chrome tanning employing both pickle-based and pickle-less method. The preceding (pre-tanning) and succeeding (post-tanning) processes were water mediated for comparison. The results show that the color and other organoleptic properties of both wet blue and crust leathers are comparable to conventional leathers. The strength and structural properties of experimental crust leathers are comparable to that of control leathers. The main benefits in switching over to heptane medium are improved exhaustion of chromium during both pickle-based and pickle-less chrome tanning, better chromium distribution and recycling ability. The process also helps in reducing the chemical oxygen demand, biological oxygen demand and total solids levels in the composite liquor significantly. |
| Note de contenu : |
- MATERIALS AND METHODS : Materials - Chrome tannign in heptane medium - Determination of shrinkage temperature (T) - Analysis of chrome tanned leathers - Analysis of leachable chromium - Analysis of spent chrome liquor - Composite liquor analysis - Scanning electron microscopic analysis - Analysis of crust leathers - Studies on the recycling of the spent heptane liquor
- RESULTS AND DISCUSSION : Assessment of the wet blue leather - Chromium exhaustion/distribution and shrinkage temperature analysis - Leaching analysis - Composite liquor analysis - Evaluation of crust leathers - Recycling studies |
| En ligne : |
https://drive.google.com/file/d/17AkqVwa6vTDcrHuGjkmR8Q2Van8eJExc/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29248 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 10 (10/2017) . - p. 338-346
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Non-polar medium enables efficient chrome tanning in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 10 (10/2017)
