[article]
| Titre : |
The effect of surfactant on the isolation of protein products from chromium-containing solid tannery waste. Influence on the process and on the chemical, physical and functional properties of the resultant gelatin |
| Type de document : |
texte imprimé |
| Auteurs : |
Luisa F. Cabeza, Auteur ; Sandra M. Clauson, Auteur ; Maryann M. Taylor, Auteur ; Eleanor M. Brown, Auteur |
| Année de publication : |
1999 |
| Article en page(s) : |
p. 190-198 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Protein products can be isolated from chrome shavings using two processes that had been demonstrated to be economically attractive. Surfactant is used during the extraction of the protein products to avoid foam formation. Foam would make the manipulation of the mixtures difficult, disturbing the separation of the protein products from the residual chrome cakes, and could inactivate the enzyme. The influence of surfactant on the gelatin isolated from chrome shavings was studied. First, the need for surfactant during the extraction process in the one-step and the two-step processes was studied in the laboratory. Then, the two-step process was carried out with and without surfactant in pilot plant scale experiments to evaluate the foam formation during the first step. The physical and chemical analyses of the gelatin extracted showed good repeatability of the process, with no significant differences between the gelatins isolated with and without the use of surfactant. Finally, functional properties of the gelatin extracted in the pilot plant experiments were determined and compared, to evaluate the influence of surfactant on each of them. These experiments showed that surfactant is not always necessary, and it will depend on the equipment used when the process is carried out industrially. The use of surfactant should be avoided when possible, and when used its influence on foaming and emulsification properties should be expected. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Procedures - Analyses - Foamability - Adhesive test - Emulsion capacity |
| En ligne : |
https://drive.google.com/file/d/1CHgbct6RKT-Xl2LDC9LvSQ8IS3UiW9cp/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4454 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LCIV, N° 5 (07/1999) . - p. 190-198
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