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Enzymic treatment of chrome shavings / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)

Titre :	Enzymic treatment of chrome shavings
Type de document :	texte imprimé
Auteurs :	Maryann M. Taylor, Auteur ; Edward J. Diefendorf, Auteur ; G. C. Na, Auteur
Année de publication :	1990
Article en page(s) :	p. 264-275
Note générale :	Bibliogr.
Langues :	Américain (ame)
Index. décimale :	675.2 Préparation du cuir naturel. Tannage
Résumé :	A method was developed that separates solid chrome shavings into a protein and a chromium product. The method entails the proteolytic treatment of chrome shavings at a temperature from 60 to 65° C. in the presence of 5-6% lime. Following the treatment, the protein can be separated by filtration, leaving a chromium cake. Extraction of the chromium cake with sulphuric acid produces a chromium solution which may be used directly in the pickle step. Alternatively, the chromium could be precipitated from the acidic solution and used to make up the tan. The protein hydrolyzate contains less than 4.5 ppm chromium and has potential as a feed, fertilizer, or as an additive in the cosmetic industry.
En ligne :	https://drive.google.com/file/d/1LviHZLzj48pOt4H3AbfMdbBevs7WhLIB/view?usp=drive [...]
Format de la ressource électronique :	Pdf
Permalink :	https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8717

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