[article]
| Titre : |
Approach towards zero discharge tanning : exploration of NaOH based opening up method |
| Type de document : |
texte imprimé |
| Auteurs : |
Palanisamy Thanikaivelan, Auteur ; T. Ramasami, Auteur ; Balachandran Unni Nair, Auteur ; Jonnalagadda Raghava Rao, Auteur |
| Année de publication : |
2001 |
| Article en page(s) : |
p. 222-233 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Beam house processes are known to contribute 60-70% of the total pollution load in leather processing. The chemicals, namely sodium sulphide and lime, were not quantified and employed without proper rationale. Lime has a potential to drive swelling in a gradual manner due to its low solubility but lacks in environmental concern. Huge amounts of lime sludge and total solids formation are the main drawbacks of lime. In an earlier attempt, lime has been totally avoided for dehairing purpose. However, lime has been indispensable for the purpose of opening up of fibre bundles. Sodium hydroxide for this purpose was thought to be an improper choice due to its high alkaline nature. In this investigation an optimum concentration (1.0% offer at 350% float) of sodium hydroxide has been established for optimal opening up of fibre bundles. This has been substantiated through scanning electron microscopic, spent alkali liquor and pelt analysis, softness measurements and stratigraphic chrome distribution analysis. Performance of the leathers is shown to be on par with conventionally treated leathers through physical and hand evaluation. Especially softness of the leathers is numerically proven to be comparable with that of control. The process also enjoys elimination of deliming process coupled with a 45% reduction in total solids load on environment. |
| En ligne : |
https://drive.google.com/file/d/1FMDazk_Ue4XcI_64aCdPZPIZDhE5qDlW/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4374 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 6 (06/2001) . - p. 222-233
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Approach towards zero discharge tanning : exploration of NaOH based opening up method in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 6 (06/2001)
