Cleantan - Chromium tanning without chromium and water residues / Manfred Renner in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 8 (08/2013)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 8 (08/2013) . - p. 289-293 Titre : Cleantan - Chromium tanning without chromium and water residues Type de document : texte imprimé Auteurs : Manfred Renner, Auteur ; B. Weidner, Auteur ; H. Geihsler, Auteur Année de publication : 2013 Article en page(s) : p. 289-293 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Déchets -- Réduction Dioxyde de carbone Eau -- Consommation -- Réduction Eaux usées -- Recyclage Pollution -- Lutte contre Tannage au chrome Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Fraunhofer UMSICHT has developed a new chromium tanning process principle to reduce the chromium contaminated sewage water, to save tanning agents and to reduce the process time. The first part of the lecture, given by Manfred Renner, head of business unit, will give a survey of the new tanning principle. The compressed natural gas carbon dioxide is used instead of water for the pickling and the tanning process. The use of different pressure ranges gives the possibility to control the pH value without using chemicals. A free from water and free from salt pickle is possible. The use of chromium can be controlled precisely and it is possible to use only as much chromium as can be fixed in the collagenic matrix. The lecture will show results achieved with technical- and preindustrial scale (650 kg split weight per batch) high-pressure equipment. Using carbon dioxide 14 million liters of chromium contaminated sewage water in the tanning process, 20 billion liters of sewage water to produce the tanning agents, 160 000 tons of chromium and 500 000 tons of salt could be saved regarding the worldwide market. The second part of the lecture, given by Prof. Dr. Weidner, head of the Fraunhofer Institute UMSICHT, will focus on the strategy of how to enter the market. For the prospective customers it will give the opportunity to see if the technology fits their companies and their main OEM customers. It will also be shown how easy the new equipment can be implemented in a running tannery. Note de contenu : - INTRODUCTION : CO2-intensified tanning process - MATERIAL AND METHODS : Tanning solutions - Skin - Quality assessment - 20 L high pressure tanning bin - 1,700 L high pressure tanning bin - RESULTS : Chromium tanning under CO2-pressure as function of pressure and contact time - Tanning free of chromium contaminated wastewater - Influence of pressure using a minimum of chemicals for different parts of skin En ligne : https://drive.google.com/file/d/1-d17RlqCNh6WqXqNgZZ1rOpGjzkazSDQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19177 [article]

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Preparation of antibacterial fatliquoring agents containing zinc oxide nanoparticles for leather industry / Ali Yorgancioglu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 5 (05/2019)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 5 (05/2019) . - p. 171-179 Titre : Preparation of antibacterial fatliquoring agents containing zinc oxide nanoparticles for leather industry Type de document : texte imprimé Auteurs : Ali Yorgancioglu, Auteur ; Eser Eke Bayramoglu, Auteur ; Manfred Renner, Auteur Année de publication : 2019 Article en page(s) : p. 171-179 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Cuirs et peaux -- Finition Emulsions Granulométrie Nanoparticules Photostabilité Produits de nourriture du cuir Zinc Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this study, zinc oxide nano-particles known to have antibacterial properties were emulsified with different chain length paraffins to be used as fatliquoring agents. The research was carried out on chrome tanned upholstery leathers. Different proportions of nano zinc oxide were studied in the paraffin emulsions. The prepared emulsions were investigated underneath a Keyence VHX-1000 digital microscope. The average particle size of the emulsions was measured. After the emulsification process, the leathers were finished in accordance with the industrial upholstery recipe. The emulsions were applied to leather in the fatliquoring process. Antibacterial activities of the finished leather were evaluated according to ASTM Standard E 2149-01, and the results showed significant bacterial reduction on the treated leathers. The impacts of the fatliquoring agents utilized in the research on light fastness were also inspected by using an ATLAS-XENOTEST ALPHA+ test instrument. Light fastness values of treated leathers indicated that nano zinc oxide particles provided the UV absorbing property on the collagen fibers. Note de contenu : - EXPERIMENTAL : Materials - Methods : Preparation of fatliquor emulsion - Characterization of the produced emulsion - Emulsion particle size analysis - Pilot scale trials - Antimicrobial activity assays - Evaluation of light fastness of leather - RESULTS AND DISCUSSION : Characterization of the ZnO nanoparticles - Characterization of the produced emulsion - Emulsion particle size analysis - Antibacterial properties of the fatliquored leathers - Pilot scale trial studies and measurement of antibacterial properties and light fastness of leather En ligne : https://drive.google.com/file/d/1rRjDWOSP7H7-Lp0WP36rgLydMfhhbu_u/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32477 [article]

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