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JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) . Vol. XCVIII, N° 2Mention de date : 02/2003Paru le : 15/02/2003 |
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Ajouter le résultat dans votre panierCharacterization of waste materials in tanneries for better ecological uses / A. Rangel-Serrano in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 2 (02/2003)
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Titre : Characterization of waste materials in tanneries for better ecological uses Type de document : texte imprimé Auteurs : A. Rangel-Serrano, Auteur ; M. Maldonado V., Auteur ; K. Kösters, Auteur Année de publication : 2003 Article en page(s) : p. 43-48 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tanning processes generate significant volumes of by-products and waste materials, among which fleshings represent the major proportion. This material can be obtained either before or after the liming treatment. The liming treatment alters the fat and protein content in the residual lleshings. The principal objective of this project is to develop a method to re-use an ample portion of these pretanned wastes. Among the already identified materials in the laboratory, we have: delimed fleshings, limed fleshings, fatty extraction residues and residual, immunized hair. It is our main concern to recover the proteins from these by-products, which constitute their majority component. Preliminary results show that during liming up to 31 percent of the soluble proteins are lost, as well as 50 percent of its fats, compared to fleshing without calcium hydroxide treatment. At the industrial scale, these differences result in variable fat recovery conditions and high volumes of low valued residual sludge. Residual hair was found to have a high protein content of 82 percent, with nitrogen content of 13 percent. Delimed fleshings have been found to contain 15 percent nitrogen. Here we would like to stress that both delimed fleshings and residual hair might well constitute an important source of protein with interesting uses as biological fertilizers in agriculture or horticulture. A series of fertilization tests have been carried out in a greenhouse. En ligne : https://drive.google.com/file/d/1aJ7X1Vu8ErRpzSEaAKGTa1JiduyrqXGf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4092
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Code-barres Cote Support Localisation Section Disponibilité 001583 - Périodique Bibliothèque principale Documentaires Disponible Treatment of composite tan liquor / N. B. Prakash in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 2 (02/2003)
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Titre : Treatment of composite tan liquor Type de document : texte imprimé Auteurs : N. B. Prakash, Auteur Année de publication : 2003 Article en page(s) : p. 49-55 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Detailed laboratory studies were carried out to determine the optimum conditions of operation under which anaerobic digestion of tannery effluent could be done. The studies showed that an optimum BOD influent load of 0.3 Kg BOD/m3/day with 3 days retention time could be adopted to yield about 97.1 percent BOD reduction. The role of magnesium carbonate during anaerobic digestion has been studied for methane generation. En ligne : https://drive.google.com/file/d/1avHgFRbgzuhBhNlouN36MrC7Ptr_qNCQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4093
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Code-barres Cote Support Localisation Section Disponibilité 001583 - Périodique Bibliothèque principale Documentaires Disponible Reaching zero the ISO way / Chris R. Ehret in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 2 (02/2003)
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Titre : Reaching zero the ISO way Type de document : texte imprimé Auteurs : Chris R. Ehret, Auteur Année de publication : 2003 Article en page(s) : p. 56-62 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure En ligne : https://drive.google.com/file/d/1PCwzIbedx4kY2XcMm2_dBrKrVZwt0Fw1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4094
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Code-barres Cote Support Localisation Section Disponibilité 001583 - Périodique Bibliothèque principale Documentaires Disponible Chrome free tanning compositions and processes / William C. Prentiss in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 2 (02/2003)
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Titre : Chrome free tanning compositions and processes Type de document : texte imprimé Auteurs : William C. Prentiss, Auteur ; Marcel Siegler, Auteur ; Eleanor M. Brown, Auteur Année de publication : 2003 Article en page(s) : p. 63-69 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Totally organic tannages that start with an aromatic composition that lends itself to secondary reactions or crosslinking are one approach to the reduction or elimination of chrome as the primary tanning agent for leather. Our approach was to focus on the preparation of low molecular weight methacrylic acid copolymers with methacrylate comonomers in order to maintain a rigid-rod structure with functional groups extending from the rod. In one series we developed polymerization procedures with an aminomethacrylate monomer, to impart cationic functionality to the tanning molecule, and hydroxyethylmethacrylate to provide hydroxyl functionality for the second stage reaction. In another series, methacrolein was the only comonomer thus providing aldehyde functionality for the second stage reaction. For evaluation shrinkage temperatures were measured before and after the addition of crosslinking agents to the experimentally tanned stock. The best result for the hydroxyl functionality was 86°C obtained with glutaraldehyde, while for the aldehyde functionality the best result was 84°C obtained with oxazolidine. While lower than shrinkage temperatures obtained with chrome tanning, these values are high enough for automotive upholstery leather. Samples of these systems were retanned with a typical upholstery formulation and evaluated. These leathers met the physical requirements for automotive leathers, but we feel the retanning formulations and polymer compositions would need adjustments to improve color matching and to be certain the fatliquors are suitable for fogging tests. En ligne : https://drive.google.com/file/d/1PZLzZqy_mgDIcA6VIIdb2t9h63qe6U9E/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4095
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Code-barres Cote Support Localisation Section Disponibilité 001583 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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001583 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |