Adding value to tannery fleshings : Part I - Oils and protein hydrolysates - Production and application / I. Bragança in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 2 (03-04/2013)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 2 (03-04/2013) . - p. 62-67 Titre : Adding value to tannery fleshings : Part I - Oils and protein hydrolysates - Production and application Type de document : texte imprimé Auteurs : I. Bragança, Auteur ; A. Crispim, Auteur ; A. Sampaio, Auteur ; E. Ramalho, Auteur ; F. Crispim, Auteur ; N. S. Caetano, Auteur ; P. C. Silva, Auteur Année de publication : 2013 Article en page(s) : p. 62-67 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Déchets -- Recyclage Cuirs et peaux -- Propriétés mécaniques Déchets -- Valorisation Echarnage Extraction (chimie) Glutaraldéhyde Huiles et graisses Hydrolysats de protéines Hydrolyse Produits de nourriture du cuir Protéines Sulfates Le sulfate est le sel de l'acide sulfurique H2SO4. La formule de l'ion sulfate est SO42-. Tannage Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The tanning industry generates a high quantity of solid wastes. Therefore, there is a need to create valorization [added value] options for these wastes. The present work had as its main objective creating added value by production of fat and hydrolyzed protein. To this end, fleshings were treated by hydrolysis with regard to the influence of various factors. The best result was found for a temperature of 60°C, 4 hours of hydrolysis, 2% of enzyme and 100% of water, with a fat extraction yield of 93%. The fat obtained through the hydrolysis process was used to produce sulphated oils. The protein hydrolysate was concentrated to about 40% of solids content and used to prepare co-products of protein hydrolysage and glutaraldehyde. Sulphated oils were applied in leather fatliquoring and the different protein hydrolysates were tested in leather retannage. The leather samples obtained were evaluated by physical-mechanical tests and the results were compared to those obtained through a standard process. the results were very satisfactory and, in some cases better than the specified standard. The process of adding value to this waste results in a double advantage for the leather industry, reducing the environmental impact and allowing production of alternative products for leather fatliquoring and retannage. Note de contenu : - MATERIALS AND METHODS : Fat extraction - Oil production - Hydrolysate treatment - Leather treatment and evaluation - Fat extraction - Oil production - Hydrolysate treatment - Leather treatment and evaluation En ligne : https://drive.google.com/file/d/1L81N_8EBYtQFg4_VzHytHtl0U2zipgd1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18143 [article]

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Adding value [valorization] to tannery fleshings : Part II - Effect of protein hydrolysates on leather dyeing / I. Bragança in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 3 (05-06/2013)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 3 (05-06/2013) . - p. 111-115 Titre : Adding value [valorization] to tannery fleshings : Part II - Effect of protein hydrolysates on leather dyeing Type de document : texte imprimé Auteurs : I. Bragança, Auteur ; H. Nouws, Auteur ; A. Crispim, Auteur Année de publication : 2013 Article en page(s) : p. 111-115 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Déchets -- Recyclage Cuirs et peaux -- Teinture Déchets -- Valorisation Echarnage Glutaraldéhyde Hydrolysats de protéines Retannage Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The tanning industry generates a high quantity of solid wastes. Therefore, there is a need to create valorization [added value] options for these wastes. The main objective of the present work was to study the effect of protein hydrolysates (HP) prepared from fleshings on leather dyeing. During previous studies it was found that the application of HP products, obtained from fleshings, in leather retannage intensified the colour of crust leather. In this work the CIELAB colour system was used to evaluate the effect of HP on retannage processes. The main conclusions of this study were: (i) HP can be used instead of a dicyanodiamide resin (Fortan DC) if the colour parameters of the standard procedure are to be maintained, and (ii) the replacement of an acrylic resin (Fortan A40) by glutaraldehyde-modified HP (GHP) results in a darker skin, and can therefore be interesting for the reduction of the quantity of dye used. En ligne : https://drive.google.com/file/d/1EHtGtnpl_byGnKXM02-muwHEK8ZIk1dB/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18839 [article]

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