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JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) . Vol. CIII, N° 1Mention de date : 01/2008Paru le : 14/01/2008 |
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Ajouter le résultat dans votre panierLife cycle assessment (LCA) of the oxidative unhairing process by hydrogen peroxide / Domenico Castiello in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 1 (01/2008)
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inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIII, N° 1 (01/2008) . - p. 1 - 6
Titre : Life cycle assessment (LCA) of the oxidative unhairing process by hydrogen peroxide Type de document : texte imprimé Auteurs : Domenico Castiello, Auteur ; Monica Puccini, Auteur ; Maurizia Seggiani, Auteur ; Sandra Vitolo, Auteur ; Francesco Zammori, Auteur Année de publication : 2008 Article en page(s) : p. 1 - 6 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux
Epilage oxydatif
Peroxyde d'hydrogèneLe peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales.Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The ever increasing attention to the environmental impact of the process industry imposes an obligation to constantly improve the global sustainability of the tanning process. Among the numerous phases of the tanning process, the beamhouse accounts for most of the total polluting charge, due to the use of sodium sulfide and lime during the manufacturing process of hides. Hence, the authors have recently developed an alternative unhairing process that eliminates the use of sulfides. The actual reduction of the environmental impact of this process, in relation with the traditional one, was evaluated performing a Life Cycle Assesment (LCA) using SimaPro 6, one of the most used software for LCA analysis. Environmental impacts were finally rated using “EDIP 97” assessing methodology. Since impact assessment methodologies were mainly developed for the manufacturing field, EDIP 97 was slightly modified and adapted to fit with the tannery industry. En ligne : https://drive.google.com/file/d/1qyXVkedJkflH9aqtm7CywGN4kT50xzQ7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2580 [article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 009033 - Périodique Bibliothèque principale Documentaires Disponible Quo vadit chromium ? The future directions of tanning / Anthony D. Covington in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 1 (01/2008)
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inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIII, N° 1 (01/2008) . - p. 7 - 23
Titre : Quo vadit chromium ? The future directions of tanning Type de document : texte imprimé Auteurs : Anthony D. Covington, Auteur Année de publication : 2008 Article en page(s) : p. 7 - 23 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : From leather science, a deeper understanding of the theoretical basis of the tanning mechanism has unified the inorganic and organic chemistries of leather making processes. The ‘link-lock’ mechanism provides an explanation of present reactions and a tool for future developments. The question now posed is: where does this new thinking take us, in terms of the future of tanning? The answer is: into a paradigm shift. Chrome tanning will remain with us, but in the future it can be viewed very differently from its currently perceived technology. Options for transforming the process may now be proposed. Important in this exercise is to question closely the conventionally accepted features of the reaction. Alternative technologies for tanning in the modern era can now be developed, to make high hydrothermal stability leathers. Here, the link-lock theory has demonstrated that such outcomes cannot be achieved by any single conventional reagent, at least two tanning components are needed. Moreover, tanning can be more accurately formulated to match the chemistry (or biochemistry) of the reaction to the performance and environmental impact requirements of the leather. En ligne : https://drive.google.com/file/d/1rXdoWX759I23x-RsQ_OLvs5FFYJZ-m8k/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2581 [article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 009033 - Périodique Bibliothèque principale Documentaires Disponible A modified leather processing method for water and pollution reduction in tannery / Subramani Saravanabhavan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 1 (01/2008)
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inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIII, N° 1 (01/2008) . - p. 24 - 35
Titre : A modified leather processing method for water and pollution reduction in tannery Type de document : texte imprimé Auteurs : Subramani Saravanabhavan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2008 Article en page(s) : p. 24 - 35 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Current practice of leather manufacture subjects the hides/skins to repeated acid and alkali treatments. Conventional process protocol results in high total dissolved solid (TDS) and chemical oxygen demand (COD) in the wastewater. Further, the process employs huge amount of water and subsequently discharges the same as wastewater. The cost for the treatment of wastewater is directly proportional to the volume of wastewater generated. In this study, the leather processing sequence has been modified for water and pollution reductions as well as better quality leather production. The modified process treats the delimed pelt with post-tanning chemicals first followed by chrome tanning salt. This is possible due to appropriate choice of charge of the hide matrix and post tanning chemicals and pH profiles of leather processing. This process logic eventually eliminates several acid and alkali treatment and washing steps that are followed in the conventional process. The percentage offer of post tanning chemicals is determined based on pelt weight to split weight relation. The leather from modified process is characterized through stratigraphic distribution of chromium, percentage oils and fats, scanning electron microscopy, softness and physical testing. The performance of the leathers is found to be on par with that of conventionally processed leathers through hand and physical evaluation. The modified process significantly reduces the usage and discharge of water by 62 and 62%, respectively. It also enjoys the reduction in COD and (TDS) loads by 49 and 70%, respectively. Further, the process reduces the usage of chemicals by 41% by avoiding acid and alkali treatment steps. The modified process appears to be technically feasible and economically viable. En ligne : https://drive.google.com/file/d/1kmj6fm56TX5aO45s3Io7On2E-x1Gm_je/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2582 [article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 009033 - Périodique Bibliothèque principale Documentaires Disponible Hight exhaust chrome tanning using novel copolymer for eco-friendly leather processing / James Kanagaraj in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 1 (01/2008)
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inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIII, N° 1 (01/2008) . - p. 36 - 43
Titre : Hight exhaust chrome tanning using novel copolymer for eco-friendly leather processing Type de document : texte imprimé Auteurs : James Kanagaraj, Auteur ; B. S. R. Reddy, Auteur ; Geetha Baskar, Auteur ; Sanjeev Gupta, Auteur Année de publication : 2008 Article en page(s) : p. 36 - 43 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The novel nanoparticle dispersion (NPD) of a high molecular weight copolymer in aqueous medium was investigated for its application as an aid to chrome exhaustion. The copolymer chain is made up of two types of monomers, viz. an acrylic ester and an amino acid derivative. The copolymer was synthesized using microemulsion polymerization methods. The monomer from the amino acid derivative provides conditions for microemulsion polymerization reaction in aqueous medium and facilitates formation of NPD of the copolymer in water. The developed NPD exhibits narrow particle size distribution with particle size at 40nm. The NPD is a free flowing liquid with flow characteristics almost similar to water, as shown from its low relative viscosity of 1.08 at 25°C. The zeta potential of NPD at -32.9mV demonstrates anionic nature of the copolymer particle and this may be provided from amino acid derived monomer. The NPD was tested in chrome tanning as an exhaustion aid. The NPD was used in chrome tanning experiment in the pilot level scale and the exhaustion and leather properties were found. From elaborate investigations, it is demonstrated that NPD could perform as a high exhaust chrome aid to provide 94% exhaustion of chromium when used during chrome tanning operation. The effect of NPD on the physiochemical characteristics of leather is presented. En ligne : https://drive.google.com/file/d/1Jsw2q2a8-noWYzkjNDEcDa2ZG8hJdC4k/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2583 [article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 009033 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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009033 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |