| Titre : |
Value added leather auxiliaries from paper and pulp industry waste |
| Type de document : |
texte imprimé |
| Auteurs : |
Mohan Vedhanayagam, Auteur ; Tewodros Kassa, Auteur ; Kalarical Janardhanan Sreeram, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 295-301 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Agents de tannage
Extraction par solvant
Formaldéhyde
Liqueur noire -- RecyclageLa liqueur noire est la liqueur de cuisson issue de la fabrication du papier kraft. Il s'agit d'une solution aqueuse composée des résidus de lignine et d'hémicellulose dissous de la pâte à papier, ainsi que des autres composés chimiques inorganiques utilisés dans le processus de dissolution. Elle contient en outre plus de la moitié de la teneur énergétique du bois amené dans le lessiveur. Normalement concentrée jusqu'à 65 % - 80 % par un évaporateur multi-effets, elle est ensuite brûlée à 1 200°C dans une chaudière de récupération afin de produire de l'énergie et récupérer les produits chimiques de cuisson.
Papèterie -- Déchets -- Recyclage
Récupération (Déchets, etc.)
Sulfonation
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The present work involves the preparation of a retanning agent from the organics present in the black liquor generated by paper and pulp industry. Black liquor organics was extracted by using solvent extraction method and subsequently separated as acidic, non-acidic and organic compounds that were not degraded. Acidic and non acidic organics were sulfonated and further condensed with formaldehyde to obtain a product ideal for application. Sulfonation – condensation reactions were modulated to achieve particle size on par with that of commercial syntans. Condensed products from both acidic and non-acidic components were used in lieu of synthetic tanning agents in retanning. The final leathers exhibit offwhite color with good mechanical strength as compared to leathers from commercial phenolic syntan. This work reveals that the black liquor, which is a by-product of paper and pulp industry could through an innovative process, be turned into a retanning agent for leather processing. The product has the advantage of being able to replace phenol – a product with high market fluctuation. |
| Note de contenu : |
- EXPERIMENTAL : Materials and methods - Extraction of acidic and non-acidic organics from black liquor - Preparation of syntan from non-acidic organics of black liquor (Syntan A) - Preparation of syntan from acidic organics (Syntan B) - FT-IR spectroscopy - Dynamic light scattering (DLS) - Performance evaluation on leather - Determination of color difference of crust leathers - Physical testing of crust leathers - Evaluation of organoleptic properties - Optical microscopic analysis - Formaldehyde content in the leather - Gas-permeability analysis
- RESULTS AND DISCUSSION : Extraction of degraded lignin - FT-IR spectrum of organic and non-acidic organic components - Particle size of condensed product - Color measurements - Performance evaluation of developed syntans. 1. Evaluation of organoleptic properties - Evaluation of crust leather - II. Gas permeability analysis - Overall considerations |
| En ligne : |
https://drive.google.com/file/d/1wry6s1S2NwzB3pqkvelQnrvmrMVgS7Ex/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24597 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CX, N° 9 (09/2015) . - p. 295-301
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Value added leather auxiliaries from paper and pulp industry waste in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 9 (09/2015)
