Sugar tanning / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 56 (11-12/2022)  

[article]  inINTERNATIONAL LEATHER MAKER (ILM) > N° 56 (11-12/2022) . - p. 30-34 Titre : Sugar tanning Type de document : texte imprimé Auteurs : Karl Flowers, Auteur ; Andy Schweizer, Auteur ; Wolfgang Armbruster, Auteur ; Daniel Gruseck, Auteur Année de publication : 2022 Article en page(s) : p. 30-34 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composés organiques -- Synthèse Cuirs et peaux -- Biodégradation Ecotoxicologie Réactions chimiques Tannage chrome free Triose Un triose est un ose (monosaccharide) contenant trois atomes de carbone. Ils ont la même formule brute C3H6O3. Il n'y a que deux trioses : - le glycéraldéhyde, un aldotriose - la dihydroxyacétone, un cétotriose Les trioses jouent un rôle important dans la respiration. (Wikipedia) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The leather industry is constantly moving into new areas of chemistry and technology. The development of chromium-free leathers is an area of active research with great commercial incentives for tanneries to have a range of tannage types in their portfolio. The chemical industry is keen to help tanners, including embracing green chemistry principles Kreuder et al. (2017). At the heart of these principles are the adoption of environmentallyfriendly practices and the use of chemicals that have low environmental and human impact. Low-risk profiles are a major driver for new tanning chemistry. In terms of low environmental and social impacts, the tannage step is a key driver in determining the fundamental sustainability of a final leather article. A modem tanning chemical must ideallybe manufactured of renewable resources that should be of biogenic origin. If a waste biogenic chemical can be sourced, converted into a chemical ideal for tannage and then used with easy application, on multiple leather article types, then it will be of great interest to the international tanning community. Further, leather manufacturing processes generate trimming and other processing by-products that must be sustainably and profitably managed. If the final leather, the by-products, (and the leather articles) can be part of a circular bioeconomy, then the fundamental chemical building blocks can be recycled back into natural elemental cycles. This paper will outline a triose chemistry that will introduce new tannage capabilities that will allow even further green chemistry into the global leather industry. Note de contenu : - Which sugars ? - Chemical reaction - Manufacture science - Process science - Biodegradability science - Fig. 1 : Chemical structure of triose - Fig. 2 : Nucleophilic attack on the tanning agent (Ɛ-amino group tageting triose carbonyl) - Fig. 3 : Chemical manufacture of triose - Fig. 4 : Photo of disintegration of triose tanned leather on day 11 of the ISO 2O200 test - Fig. 5 : Plant ecotoxicity studies of triose showing vibrant top growth En ligne : https://drive.google.com/file/d/1U5du7LjkPfHN-HGyaaxqzBk9ZWut21FG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38431 [article]

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