[article]
| Titre : |
Glyoxylic acid : an interesting contribution to clean technology |
| Type de document : |
texte imprimé |
| Auteurs : |
Karlheinz Fuchs, Auteur ; Rainer Kupfer, Auteur ; John W. Mitchell, Auteur |
| Année de publication : |
1993 |
| Article en page(s) : |
p. 402-415 |
| Langues : |
Américain (ame) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
In nearly all countries on earth the protection of the environment has become increasingly a very serious concern. As a result, those producing idustrial and consumer products must strive to reduce environmental strain.
Main causes of concern for tanners are the chrome-containing effluents from chrome tanning, washing, neutralization, retanning, and dying. These have been studies in Hoechst and the authors are pleased to now present a constructive solution: a glyxylic acid pickling process for chrome tanning that considerably reduces the chronium content of tannery effluents (extraordinary fixation, minuscule leaching). It is already well established in many tanneries in Germany, Europe and other parts of the world.
Glyoxylic acid becomes an aid to tanning by converting amine groups in collagen to carboxyl groups, creating additional sites for chrome to combine with the collagen, witch causes the chrome offered to be better exhausted and more strongly fixed than a conventional tannage.
Advantages of the glyoxylic acid pickle include: exceptional chrome exhaustion; leaching is drastically reduced during wringing, washing, and retanning; conventional chrome tanning salt is used; chrome is offered at a reduced level; grain wrinkles level; and it is liquid for automated feed systems. |
| En ligne : |
https://drive.google.com/file/d/1obRwOG5evU3usqEg3-S-XQMtJdZfuX-Q/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8143 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVIII, N° 1 (11/1993) . - p. 402-415
[article]
|
Aller sur edunet
Accueil
Ajouter le résultat dans votre panierThe 1962 john arthur wilson memorial lecture - Tanning research in retrospect and prospect in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVIII, N° 1 (11/1993)
