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675.2 : Préparation du cuir naturel. Tannage |
Ouvrages de la bibliothèque en indexation 675.2
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De-chroming of chromium shavings without oxidation to hazardous Cr6+ / Ján Matyasovsky in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 1 (01/2011)
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Titre : De-chroming of chromium shavings without oxidation to hazardous Cr6+ Type de document : texte imprimé Auteurs : Ján Matyasovsky, Auteur ; Ján Sedliacik, Auteur ; Peter Jurkovic, Auteur ; J. Kopny, Auteur ; Peter Duchovic, Auteur Année de publication : 2011 Article en page(s) : p. 8-17 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux
DéchromageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : After the process of hide tanning to leather, almost 25% weight of input raw material proceeds to chromium tanned waste. The occurrence of such a large amount of waste presents economic and mainly ecologic problem for this industry ; thus substantial global effort is given to development of improved technologies for the disposal of chromium tanned waste. The results of this effort are different technologies whereit is possible to separate chromium from collagen. Application of these procedures in industry and also the proportion of valuation of chromium waste depend on effective application of the separated materials. The aim of our work was development of ecological de-chroming technology of chromium shavings without oxidation of Cr3+ to Cr6+ with retaining acceptable fibril structure. The pH value, temperature and number of dechroming bath have an influence on amount of removed extracted chromium. The influence of these parameters on losses of collagen after hydrolysis was determined. The degree of hydrolytic collagen decay was evaluated by determination of iso-electric point and determination of collagen increased solubility in dependence on de-chroming temperature. The results include optimization of technology; determination of the influence of temperature, pH, quantification of de-chroming released Cr3+ and determined qualitative collagen parameters. En ligne : https://drive.google.com/file/d/1yNe0kdPtkg3tzPtvxqxXahgqACiYiJot/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10519
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVI, N° 1 (01/2011) . - p. 8-17[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012733 - Périodique Bibliothèque principale Documentaires Disponible Chromium, aluminium, resin and fatliquoring : an american view / Jack O. Lavoie in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)
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Titre : Chromium, aluminium, resin and fatliquoring : an american view Type de document : texte imprimé Auteurs : Jack O. Lavoie, Auteur Année de publication : 1985 Article en page(s) : p. 141-143 Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Note de contenu : Chrome retanned leather / Aluminium tannage / Resin retanned leather / Vegetable retanning / Process : wet-stuffed boot leather-stock 2.0-2.5 (chrome tanned). En ligne : https://drive.google.com/file/d/1RrCWWPO5ycgbTI_5eU8sni4gWkO3ymaj/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9411
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 69 (Année 1985) . - p. 141-143[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007132 - Périodique Bibliothèque principale Documentaires Disponible Chromium and leather : a review on the chemistry of relevance for allergic contact dermatitis to chromium in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)
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Titre : Chromium and leather : a review on the chemistry of relevance for allergic contact dermatitis to chromium Type de document : texte imprimé Année de publication : 2020 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Air -- Humidité
Allergies
Antioxydants
Chrome hexavalent
Chrome trivalent
Dermatite de contact
Eczéma professionnel
Normalisation
Spéciation (chimie)
ToxicologieIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : As other causes decline in importance, chromium-tanned leather has become a more important source for chromium allergy, which affects around 1% of the general population. The aim of this review is to give suggestions on how to minimize the risk of leather-related allergic contact dermatitis, which can be elicited in chromium-allergic persons by hexavalent and trivalent chromium released from leather. Hexavalent chromium is the more potent chromium form and requires a lower skin dose to elicit allergic reactions. It is formed on the surface of some, antioxidant-free, leathers at dry conditions (< 35% relative humidity) and is influenced by the tanning process and other conditions, such as UV irradiation, contact with alkaline solutions, and leather age. Trivalent chromium is the dominant form released from chromium-tanned leather and its released amount is sufficient to elicit allergic reactions in some chromium-allergic individuals when they are exposed repetitively and over longer time (days – months). A low initial test result (< 3 mg/kg) for hexavalent chromium with the current standard test (ISO 17075) does not guarantee a low release of chromium from the leather or a low release of hexavalent chromium under typical exposure conditions during the service life of the leather. Information, labels, and certificates regarding leather products are often insufficient to protect chromium-allergic individuals. Correct labelling and information on the possible content of different allergens, as well as different tanning alternatives for certain leather products, are crucial. Note de contenu : - INTRODUCTION : Chromium speciation – toxicological considerations - Chromium tanning - Chromium allergy and allergic contact dermatitis (ACD) - Relevant chemical speciation of chromium for ACD - Prevalence of chromium allergy - Severity and persistence of chromium allergy and ACD
- TRIVALENT VERSUS HEXAVALENT CHROMIUM FROM AN ALLERGIC PERSPECTIVE : Release of trivalent and hexavalent chromium from leather - Allergic reactions to trivalent and hexavalent chromium, and chromium-tanned leather
- THE FORMATION OF HEXAVALENT CHROMIUM DURING USE OF CHROMIUM-TANNED LEATHER : Age of chromium-tanned leather article in use - Environmental factors during use of leather articles
- OBSTACLES RELATED TO THE STANDARD TEST FOR HEXAVALENT CHROMIUM IN LEATHER (ISO 17075)
- PRACTICAL IMPLICATIONS FOR CHROMIUM-ALLERGIC INDIVIDUALS AS CONSUMERS OF LEATHER PRODUCTS
- ALTERNATIVES TO CHROMIUM-TANNING FROM AN ALLERGY PERSPECTIVE
- Table 1 : Summary of selected data on the prevalence of chromium allergy in the general population and different clinical/occupational groups in different continents and countries. The data are merged for Europe, Asia, and North America. A detailed overview is given in the supplementary file, Table S
- Table 2 : Most important tanning, leather, and exposure factors/conditions for the release of trivalent and hexavalent chromium from chromium-tanned leatherDOI : https://doi.org/10.1186/s42825-020-00027-y En ligne : https://link.springer.com/content/pdf/10.1186/s42825-020-00027-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37453
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020)[article]Chromium(III) adsorption on smectite from a tanning wastewater / C. Volzone in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 79, N° 5 (09-10/1995)
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Titre : Chromium(III) adsorption on smectite from a tanning wastewater Type de document : texte imprimé Auteurs : C. Volzone, Auteur ; E. L. Tavani, Auteur Année de publication : 1995 Article en page(s) : p. 148-152 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Adsorption of chromium(III) on a smectite from a tanning wastewater was studied. Similarly adsorptions of sodium, chloride and sulphate were analyzed. Tests were carried out with solutions with a chromium(III) content ranging between 0.62-31.20 mmole/1. The method used to develop this work covered the characterization of the solution and of the smectite before and after each test. Solutions were characterized by chemical analyses and by visible spectrophotometry. The original smectite and smectites after each adsorption test were characterized by chemical analyses, by X-ray diffraction, by scanning electron microscopy and by surface chemical analysis via an electron microprobe. The results allowed us to determine the principal physicochemical characteristics of the chromium(III) adsorption on smectite. Monomeric chromium(III° was detected in the tanning wastewater and in each of the solutions prepared from the original solution. Adsorptions of sodium, chloride and sulphate were negligible for tests performed with low concentration solutions. Such behaviour changed with the increase of the prepared solution concentrations. The maximum adsorptions determined were : 0.81 mmole of chromium(III)/g of smectite ; 0.30 mmole of sodium/g of smectite ; 0.30 mmole of chloride/g of smectite and 0.15 mmole of sulphate/g of smectite. Finally, the Langmuir equation was used in order to quantify the chromium(III) adsorption. En ligne : https://drive.google.com/file/d/1kCV_IxdXxJwuBYFxwyBOJGJcPMK30UwJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8201
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 79, N° 5 (09-10/1995) . - p. 148-152[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007006 - Périodique Bibliothèque principale Documentaires Disponible Chromium in tannery effluents and its impact on the environment / J. Gauglhofer in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 75 (Année 1991)
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Titre : Chromium in tannery effluents and its impact on the environment Type de document : texte imprimé Auteurs : J. Gauglhofer, Auteur Année de publication : 1991 Article en page(s) : p. 103-106 Note générale : Papers from the 42nd South African Convention - Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chromium is the most widely used tanning agent. For the tanner it is easy to use and produces high quality leather. By different retannages and other treatments it is possible to produce quite different leathers, starting from the same chrome tanned stock. Thus chrome tannage is very versatile and shortens the response time of the tanner to the demand for a new leather type. So, from the point of view of a tanner, chromium as a tanning agent has almost only advantages and he will be very reluctant to substitute it by any other tanning agent.
Unfortunately, chromium is a heavy metal and thus under environmental scrutiny. Some chromium compounds ar toxic and even carcinogenic. Thus legislation has developed to restrict the discharge of chromium into the waste water and into dolid wastes. Consequently the tanner is obliged to undertake appropriate actions.
In the following a short excursion on the legislation on chromium will be given, the sources of discharge from the tannery and measures for restricting it will be discused and then the relevance of chromium as an environmental hazard will be estimated.
2. Legislation on chromium containing.
3. Sources of discharge of chromium into tannery effluents.
4. Measures to reduce the chromium discharge.
5. Relevance of chromium as an environmental hazard.En ligne : https://drive.google.com/file/d/1JZiGfK1s55EfSTg2_wIbryGvemLOiPTv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8681
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 75 (Année 1991) . - p. 103-106[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007138 - Périodique Bibliothèque principale Documentaires Disponible Chromium in the tanning industry : an odissey from cradle to grave / Buddhadeb Chattopadhyay in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 4 (07-08/2012)
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PermalinkChromium-keratin tanning compound - preparation, characterization and application in tanning process / R. Karthikeyan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 5 (05/2012)
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PermalinkChromium leachability from blue shavings by the TCLP procedure / Edward E. Menden in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIX, N° 1 (01/1994)
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PermalinkChromium leachatiblity from leather waste and eco-toxicity under environmental conditions / Peng Liang-Qiong in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 3 (03/2020)
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PermalinkChromium management for tanneries / Robert M. Lollar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIV (Année 1989)
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PermalinkPermalinkChromium species and testing (part 1) / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 36 (07-08/2019)
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PermalinkChromium sulphate recovery in a triple-effect evaporator / G. A. Gasmelseed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 1 (01-02/2002)
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PermalinkClean technology for tannage with chromium salts - part 1 / Françoise Silvestre in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 78, N° 1 (01-02/1994)
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PermalinkClean technology for tannage with chromium salts. part 3 : cost analysis and integration into different manufacturing processes / Véronique Chagne in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 78, N° 6 (11-12/1994)
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PermalinkA cleaner chrome-free tanning regime : sulfonated urea-phenol-formaldehyde condensed polymer and ferrous sulfate tanning / Chen Hui in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 1 (01/2011)
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PermalinkCleaner chrome tanning - A non-pickling process using an aliphatic aldehyde as pre-tanning agent / Luo Jian-Xun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 1 (01-02/2012)
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PermalinkCleaner chrome tanning - technology of chrome-reduced tanning without salt, pickling and short procedure / Luo Jian-Xun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 6 (11-12/2019)
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PermalinkA cleaner method for low-chrome tanning with no-salt pickling / Lu Cui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 5 (09-10/2017)
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PermalinkCleaner processing of bovine wet-white : synthesis and application of a novel chrome-free tanning agent based on an amphoteric organic compound / Luo Jianxun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 4 (07-08/2015)
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PermalinkCleantan - Chromium tanning without chromium and water residues / Manfred Renner in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 8 (08/2013)
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PermalinkClosed circulator sole leather tannages at ambient temperatures / D. A. Williams-Wynn in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 10 (10/1970)
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PermalinkClosed loop for chromium in tannery operation / Karel Kolomaznik in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 12 (12/2003)
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PermalinkClosed-loop liming and chrome tanning systems in full-scale wet blue manufacture, operational management, technical and environmental advantages / Richard Daniels in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 12 (12/2018)
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PermalinkClosed-loop processing : management in existing tanneries and new-builds designed for purpose / Richard Daniels in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 12 (12/2019)
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