Optimization of two low-salt chrome tanning processes without float / Josep Maria Morera in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 4 (04/2007)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CII, N° 4 (04/2007) . - p. 121-128 Titre : Optimization of two low-salt chrome tanning processes without float Type de document : texte imprimé Auteurs : Josep Maria Morera, Auteur ; Anna Bacardit, Auteur ; Lluis Ollé, Auteur ; J. Costa, Auteur ; Stefan Banaszak, Auteur Année de publication : 2007 Article en page(s) : p. 121-128 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The aim of this study was to develop at pilot plant level two systems of pickle-tanning that would reduce both the amount of waste water and its content in chrome and chlorides while obtaining leathers that are commercially acceptable. In the first one, the effect of the variation of the final tanning temperature as well as the system of adding the basificant in the formulation of a chrome tanning without float were studied. A 87 percent reduction of the residual float was obtained with this system. The amount of chrome in wastewater was reduced by 96 percent in this study as compared to that of a traditional tanning process. The reduction of chlorides in all the tanning tests without float was maintained at around 94 percent. In the second one, the pickle process was carried out without float and with low salt addition, and the inorganic acids were replaced by a sulphoaromatic acid. The effect of the variation of the final temperature was studied in the tanning, as well as the type of basification used for the chrome exhaustion in the residual float. A 88 percent reduction of the residual float was obtained with this system, as well as a 99 percent reduction in chrome content in wastewater and a 93 percent reduction in chlorides content in wastewater. En ligne : https://drive.google.com/file/d/1EhfY3d3_fEaRkIO7NlfuqgqSK0g8ctKG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3360 [article]

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Study of a chrome tanning process without float and with low-salt content as compared to a traditional process. Part II / Josep Maria Morera in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 12 (12/2006)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CI, N° 12 (12/2006) . - p. 454-460 Titre : Study of a chrome tanning process without float and with low-salt content as compared to a traditional process. Part II Type de document : texte imprimé Auteurs : Josep Maria Morera, Auteur ; Anna Bacardit, Auteur ; Lluis Ollé, Auteur ; J. Costa, Auteur ; Heinz-Peter Germann, Auteur Année de publication : 2006 Article en page(s) : p. 454-460 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The process of pickle-tanning results in the significant pollution of wastewaters through the presence of chrome and chlorides. A new process has been studied in order to reduce the negative environmental effect that pickle-tanning causes on leather making. The new process involves a pickle without float and with minimum salt offer as well as the substitution of the inorganic acid by a sulphoaromatic acid. By doing so, the required additions of chrome salt and salt are minimized and this results in high levels of chromium exhaustion in the residual float. When this process is compared to the traditional one, the results obtained indicate that there is a 78 percent reduction in residual float volume, a 93 percent reduction in chlorides content in the effluent and a 95 percent reduction in chrome content in the float. En ligne : https://drive.google.com/file/d/1YfNzvhnRc2AMMYbbn0Myy9IC5c1V0jp1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3854 [article]

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Study of a chrome tanning process without float and with low-salt content compared to a traditional process. Part I / Josep Maria Morera in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 7 (07/2006)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CI, N° 7 (07/2006) . - p. 254-259 Titre : Study of a chrome tanning process without float and with low-salt content compared to a traditional process. Part I Type de document : texte imprimé Auteurs : Josep Maria Morera, Auteur ; Heinz-Peter Germann, Auteur ; J. Costa, Auteur ; Lluis Ollé, Auteur ; Anna Bacardit, Auteur Année de publication : 2006 Article en page(s) : p. 254-259 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The traditional chrome-tanning process poses several disadvantages from the environmental point of view including effluent volume as well as chromium and chloride content. We have thus modified the process in order to minimize these disadvantages. The tanning process has been carried out with almost no float by simply utilizing the float already contained in the hide. As there is very little water, the quantity of sodium chloride required to avoid the swelling of the skin decreases sharply, due to the acidic conditions. In a corresponding manner, the mechanical work on the skin increases and the fixation of chrome salt is greater. Water consumption and chrome discharge are dramatically lower using the new system instead of the traditional system. A comparison of results shows that by using the new system water consumption decreases by 78 percent, chrome oxide content by 86 percent and chlorides present in the effluents by 94 percent. En ligne : https://drive.google.com/file/d/1xXjaqE-Av6mh2QsIhitmdVKeo_WTv8Tg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3994 [article]

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