Vegetable tan wastage in typical sole leather processes / Stanley G. Shuttleworth in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIII (Année 1978)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXIII (Année 1978) . - p. 508-514 Titre : Vegetable tan wastage in typical sole leather processes Type de document : texte imprimé Auteurs : Stanley G. Shuttleworth, Auteur ; Neville P. Slabbert, Auteur ; David A. Boast, Auteur ; Thomas Eberle, Auteur Année de publication : 1978 Article en page(s) : p. 508-514 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux Gaspillage -- Lutte contre Prétannage Semelles Tanins végétaux Tannage végétal Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In view of the high oxygen demand and resistance to biodegradation of vegetable tannins, tightening effluent standards require processes which minimize vegetable tan wastage in sole leather production. A study is made of typical modem processes, including bleach and wash liquors, in order to ascertain optimum methods of minimizing vegetable tannins in the effluent. It is concluded that the Liritan process can give 95 percent tan utilization if the color vat operates alternately as a tempering vat to eliminate bleach and wash liquors. Next in order of economy is a weak liquor suspender system followed by a powder drum tannage. Unacceptably high tan wastage appears to occur in an all-drum tannage with syntan pretannage or an all-pit counter current process. Note de contenu : - Water gain in vegetable tanning - Comparison of various processes : Countercurrent all-pit processes - The all-drum process - Weak suspender plus drum processes - The liritan process - Finishing processes - General notes on the economics of pretanning systems - General conclusions En ligne : https://drive.google.com/file/d/1OvEhTMdCvY_0HYNsY3bRzgkTUxlxE47n/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41164 [article]

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