| Titre : |
Utilisation of phenolsulphonic acid to hydrolyse chrome shavings in preparation of composite condensates for leather retanning |
| Type de document : |
texte imprimé |
| Auteurs : |
Junqing Zhang, Auteur ; Liming Dong, Auteur ; Min Chen ; Cheng Haiming |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 194-199 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Acide phénolsulfonique
Agents de tannage
Condensation
Cuirs et peaux de bovins
Cuirs et peaux de vachettes
Formaldéhyde
Hydrolyse
Retannage
Tannage -- Déchets
Tannage au chrome
Urée
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
The treatment and utilisation of chromium containing tannery waste has been of increasing concern because of the environmental pressure for safe disposal. The aim of this work is a development of the intermediate acids of the syntan to hydrolyse chrome shavings, then the hydrolysed mixtures were condensed with formaldehyde and urea to obtain a composite condensation retanning agent by the one-pot method. The effects of hydrolysis temperature, hydrolysis duration and the amount of chrome shavings were investigated. The molecular weight of the hydrolysate was controlled. The prepared composite condensations were applied for retanning bovine upper leather. The results showed that the prepared composite condensates have an excellent thickening [substance increase], filling and good level-dyeing effect on bovine upper leather. Furthermore, two benefits exist in this development, one is that no extra acid need to be added in the hydrolysis step and the other is that the chromium present does not need to be separated since the final composite product contains Cr(III). |
| Note de contenu : |
- MATERIALS AND METHODS : Materials - Phenolsulphonic hydrolysis of chrome shavings - Determination of the hydrolysis yield - SDS-PAGE analysis - Determination of free formaldehyde content - Determination of total chromium content and Cr(VI) in C-PUF - Morphological observation - Softness assessment
- RESULTS AND DISCUSSION : Hydrolysis of chrome shavings by phenolsulphuric acid - Condensation process - Retanning application on bovine upper leather |
| En ligne : |
https://drive.google.com/file/d/1tthH2ACbC3HrRnaAzfV7tpzlxbQJHHLl/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30902 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 4 (07-08/2018) . - p. 194-199
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