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675.2 : Préparation du cuir naturel. Tannage |
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Salt-free chromium tanning : Practical approaches / Murali Sathish in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 1 (01/2022)
[article]
Titre : Salt-free chromium tanning : Practical approaches Type de document : texte imprimé Auteurs : Murali Sathish, Auteur ; Rathinam Aravindhan, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2022 Article en page(s) : p. 3-9 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
DéchaulageOpération consistant à débarrasser les peaux de la chaux et des substances alcalines qui leur ont été appliquées au pelanage.
Eaux usées -- Analyse
Tannage au chrome
Tannage sans selsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chromium tanning finds a prominant place in leather manufacturing for permanent stabilization of hide/skin matrix. Though, it has multiple advantages in terms of high thermal stability, easy process and low cost etc., the current practice is not environmentally sustainable. Poor chromium exhaustion and TDS load generation are the major environmental threats of conventional chromium tanning systems. On the other hand, salt-free chromium tanning is identified as one of the efficient alternative approaches for hide/skin matrix stabilization. However, it has not been commercially practiced due to the several practical difficulties. In this work attempts have been made to develop a practically viable high-performance salt-free chromium tanning system using deliming liquor as tanning float and changing the order of addition of masking salt. The developed methodologies completely avoid the use of salt/basification process and it is suitable for all kinds of raw materials and tannery houses. Besides, the process enjoys 71-77% reduction in TDS load and the uptake of chromium is around 90%. The physical strength characteristics are on par with conventional process and the leathers exhibit good grain tightness and roundness. The developed methodologies are simple and do not require any specialty chemicals. Note de contenu : - MATERIALS AND METHOD : Practical approaches for salt-free chromium tanning - Analysis of wet-ble leathers - Analysis of physical strength characteristics and organoleptic properties - Analysis of wastewater
- RESULTS AND DISCUSSION : Approach-1 : Salt-free chrome tanning in deliming liquor (CTDL) - Approach-2 : Changing the order of addition of masking salts (COAMS) - Microscopic analysis - Physical strength characteristics and organoleptic properties - Analysis of wastewater
- Table 1 : State-of-the-art technologies for improved chrome tanning system
- Table 2 : Process recipe for salt-free chromium tanning in deliming liquor (CTDL)
- Table 3 : Process recipe for salt-free chromium tanning: changing the orner of addition of masking salts (COAMS)
- Table 4 : Process recipe for conventional pickle-based chrome tanning
- Table 5 : Characteristics of wastewater (Deliming to Tanning)DOI : https://doi.org/10.34314/jalca.v117i1.4690 En ligne : https://drive.google.com/file/d/1aI4xzqRNBLiq2uTszet6Vj-1H1yXO16p/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37025
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Code-barres Cote Support Localisation Section Disponibilité 23238 - Périodique Bibliothèque principale Documentaires Disponible Salt-pH effects on collagen thermal stability in pickling and curing / A. E. Russel in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 59 (Année 1975)
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Titre : Salt-pH effects on collagen thermal stability in pickling and curing Type de document : texte imprimé Auteurs : A. E. Russel, Auteur Année de publication : 1975 Article en page(s) : p. 6-13 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bases (chimie)
Collagène
Halogénures
pH
Stabilité thermique
SulfatesLe sulfate est le sel de l'acide sulfurique H2SO4. La formule de l'ion sulfate est SO42-.Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Effects of alkali halides and sulphates on thermal stability of insoluble and precipitated fibrous collagens have been examined in the acid-to-neutral pH range. The salt-pH levels studied corresponded to the range of conditions encountered from acid pickling to saturated brine curing. Fluoride and chloride salts stabilised collagen whereas the bromides and iodides tented to stabilise at low concentrations in acid solution only, but were structural destabilisers at high concentration. Halide effects were strongly pH-dependent and a feature of the results was the relatively small increase in collagen stability in saturated sodium chloride at neutral pH (curing conditions) compared with the large stability increase found at saturation at acid pH. Alkali sulphates on the other hand, stabilised fibrous collagen substantially at all pH levels. Assuming that an increase in heat stability of collagen is also correlated with incresed resistance to bacterial attack, the results suggest that curing in acidified brine offers additional protection. In addition, salt concentration in acid medium can be substantially decreased without affecting the excess stability in collagen. Practical implications of these results are discussed with reference to the problem of salt reduction in curing and the use of sulphates as penetration assistants in Mimosa cure and rapid vegetable tannage. Note de contenu : - EXPERIMENTAL : Materials - Measurement of thermal stability
- DISCUSSION : Salt-pH interactions in curing and pickling - Dry salt curing - Drum brining - Alkali sulphate effects on collagen stabilityEn ligne : https://drive.google.com/file/d/18d5da53f-G1PlxshtuMMV7m-aC4L1LqN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31041
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 59 (Année 1975) . - p. 6-13[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008595 - Périodique Archives Documentaires Exclu du prêt Salt-pH effects on collagen thermal stability in pickling and curing / A. E. Russel in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 59, N° 1 (01-02/1975)
[article]
Titre : Salt-pH effects on collagen thermal stability in pickling and curing Type de document : texte imprimé Auteurs : A. E. Russel, Auteur Année de publication : 1975 Article en page(s) : p. 6-13 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bases (chimie)
Collagène
Halogénures
pH
Stabilité thermique
SulfatesLe sulfate est le sel de l'acide sulfurique H2SO4. La formule de l'ion sulfate est SO42-.Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Effects of alkali halides and sulphates on thermal stability of insoluble and precipitated fibrous collagens have been examined in the acid-to-neutral pH range. The salt-pH levels studied corresponded to the range of conditions encountered from acid pickling to saturated brine curing. Fluoride and chloride salts stabilised collagen whereas the bromides and iodides tented to stabilise at low concentrations in acid solution only, but were structural destabilisers at high concentration. Halide effects were strongly pH-dependent and a feature of the results was the relatively small increase in collagen stability in saturated sodium chloride at neutral pH (curing conditions) compared with the large stability increase found at saturation at acid pH. Alkali sulphates on the other hand, stabilised fibrous collagen substantially at all pH levels. Assuming that an increase in heat stability of collagen is also correlated with incresed resistance to bacterial attack, the results suggest that curing in acidified brine offers additional protection. In addition, salt concentration in acid medium can be substantially decreased without affecting the excess stability in collagen. Practical implications of these results are discussed with reference to the problem of salt reduction in curing and the use of sulphates as penetration assistants in Mimosa cure and rapid vegetable tannage. Note de contenu : - EXPERIMENTAL : Materials - Measurement of thermal stability
- DISCUSSION : Salt-pH interactions in curing and pickling - Dry salt curing - Drum brining - Alkali sulphate effects on collagen stabilityEn ligne : https://drive.google.com/file/d/18d5da53f-G1PlxshtuMMV7m-aC4L1LqN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31858
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Code-barres Cote Support Localisation Section Disponibilité 007101 - Périodique Bibliothèque principale Documentaires Disponible Sampling strategies for infrared spectroscopic studies of raw, pickled, and in-process chrome tanned bovine hides / Dennis C. Shelly in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIV, N° 8 (10/1999)
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Titre : Sampling strategies for infrared spectroscopic studies of raw, pickled, and in-process chrome tanned bovine hides Type de document : texte imprimé Auteurs : Dennis C. Shelly, Auteur ; Eleanor M. Brown, Auteur Année de publication : 1999 Article en page(s) : p. 315-321 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Infrared spectroscopy is a powerful research tool for studying structure and structural changes in complex biomaterials, such as animal hides and leather. Recent advances in optical design and materials have made available accessories that enable the sampling of biomaterials as liquids, gels, pastes, powders and porous solids. For this report, the Gemini, a new sampling device for Horizontal Attenuated Total Reflection (HATR) and Diffuse Reflectance (DR) FTIR spectroscopy was evaluated as an option for the study of bovine hides, in successive stages of chrome tanning. Specifically, raw, pickled and chrome sulfate-treated bovine hides were subjected to HATR FTIR analysis so that changes in collagen structure as a function of chemical treatment could be observed. Also, freeze dried hides were examined by DR FTIR in order to detect the presence and structure of collagen-chromium complexes. Comparisons of HATR and DR FTIR show that the expected chemical changes in the hide can be observed. The quality of the spectra obtained is comparable to that reported by biomedical research groups. The Gemini shows excellent versatility for in-processing hide sampling, enabling the detailed study of many truly unique chemical and biochemical phenomena of the tanning process. En ligne : https://drive.google.com/file/d/1OqKnhFW_PX1dlceATzeV8rtURk-I5ZVM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4447
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIV, N° 8 (10/1999) . - p. 315-321[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006977 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Saviour or red herring ? Type de document : texte imprimé Auteurs : Graham Lampard, Auteur Année de publication : 2012 Article en page(s) : p. 38-40 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chrome -- Suppression ou remplacement
Tannage végétal
Tara et constituantsC'est un petit arbre épineux avec des gousses plates rouge qui pousse dans les zones sèches du Pérou, Amérique du Sud.
TitaneIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : the XXXI IULTCS congress held in Valencia last september had a slew of paper about non or alternative tannages to chromium but, as with many suggested tannages before them, are there really viable options among them ? Note de contenu : - Tara tannins
- Titanium tannageEn ligne : https://drive.google.com/file/d/17JLjiqQkh6JVFaA-jczfAxTohJrLDpgM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14711
in LEATHER INTERNATIONAL > Vol. 214, N° 4819 (04/2012) . - p. 38-40[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13859 - Périodique Bibliothèque principale Documentaires Disponible 13896 - Périodique Bibliothèque principale Documentaires Disponible Self-conversion of hexavalent chromium formed in chrome-tanned leather during longterm storage and perfect inhibition with an inhibitor combination / Koki Ogata in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 2 (03-04/2018)
PermalinkSelf-driven directional dehydration enabled eco-friendly manufacture of chrome-free leather / Yawen Huang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)
PermalinkA semi-empirical quantum mechanical modeling study on the interaction of collagen-like peptides with polyphenolic molecules : An attempt to gain insights into vegetable tanning / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 7 (07/2003)
PermalinkA sensitive voltammetric method for chromium (VI) in presence of chromium (III) and its application to leather / Deniz Arslan Kalender in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 4 (07-08/2011)
PermalinkSeparation and analysis of Zr-Al-Ti complex tanning agent components / Wang Kangjian in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 2 (03-04/2013)
PermalinkSeparation, speciation and quantification of both chromium (VI) and chromium (III) in tanned leather samples : a comparative study and validation of analytical methods / Mónica Gisel Arellano-Sánchez in COLLAGEN AND LEATHER, Vol. 5 (2023)
PermalinkSetting of consent limits for tanning industry trade effluents / R. M. Davies in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 1 (01-02/1997)
PermalinkSilicone dioxyde : environmentally friendly alternative for wet white manufacture / Karlheinz Fuchs in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXX, N° 6 (06/1995)
PermalinkA simple approach to leather process investigation part 5 - The correction of defects in paste dried leather by variants in retannage and fatliquoring / Ibrahim Elrufai abuelhassan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)
PermalinkA simple test to determine the propensity of a fatliquor to trigger the formation of chromium (VI) in leather / Irene Compte in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 11 (11/2022)
PermalinkSimultaneous assay of trace Cr(VI) and total chromium in tannery effluent. Using flow injection spectrophotometry with Ce(IV) as oxidant / Dai Shijun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 6 (11-12/2009)
PermalinkSimultaneous online visible detection of sulphide and chloride in tannery effluent by combination of fia and low pressure ion chromatography / Yu Lingyun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 6 (11-12/2009)
PermalinkSimultaneous tanning and fatliquoring of skins / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 70 (Année 1986)
PermalinkSimultaneous tanning and fatliquoring of skins in isopropanol / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)
PermalinkSmall-scale experimental processing drums for the hide and skin industry / R. W. Cranston in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 66 (Année 1982)
PermalinkSmit & zoon launches zeology tanning concept / Isabella Griffiths in INTERNATIONAL LEATHER MAKER (ILM), N° 44 (11-12/2020)
PermalinkSoaking with tannins-the biocidal activity of vegetable tannins used in the soaking float / S. M. Colak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 5 (09-10/2006)
PermalinkSoil injection of sludges and irrigation with effluent for increased crop yields / Rod Meldrum in WORLD LEATHER, Vol. 15, N° 6 (10/2002)
PermalinkSoluble collagen approach to a combination tannage mechanism / Eleanor M. Brown in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 4 (04/2016)
PermalinkSolvent preservation of pigskins / Peter R. Buechler in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXII (Année 1987)
PermalinkSome considerations in chrome tanning footwear leathers / Richard Daniels in WORLD LEATHER, Vol. 6, N° 7 (12/1993 - 01/1994)
PermalinkSome properties of wet-blue leathers produced from recycled chrome tanning liquors / John R. Barlow in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 2 (03-04/1977)
PermalinkSome properties of wet-blue leathers produced from recycled chrome tanning liquors / John R. Barlow in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
PermalinkSome thoughts on standardisation of synthetic tanning materials / Samir Das Gupta in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 64, N° 1 (01-02/1980)
PermalinkSome thoughts on the possible mechanism of sodium sulphate conditioning for the mimosa cure process / J. H. Atkinson in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60 (Année 1976)
PermalinkSome thoughts on the possible mechanism of sodium sulphate conditioning for the mimosa cure process / J. H. Atkinson in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60, N° 2 (03-04/1976)
PermalinkSpeciation of chromium ions in tannery effluents and subsequent determination of Cr (VI) by ICP-AES / M. A. Eid in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 11 (11/2002)
PermalinkStability of a Rhus Coriaria L. tannin extract under different storage conditions / A. Zalacain in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 6 (11-12/2001)
PermalinkStable aluminium tannage with a copolymer of n-thioureidomal acid with acrylic acid / Hongru Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 1 (01-02/2007)
PermalinkLa station d'épuration du district de Santa Croce, modèle de circularité / Juliette Sebille in LEATHER FASHION DESIGN (LFD), N° 5 (02/2020)
PermalinkStress analysis of tannery drums / George Kucmas in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XXVII (Année 1982)
PermalinkStructural and performance characteristics of pigskin leather with different tanning methods / Nataliia Pervaia in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 3 (05-06/2019)
PermalinkStructural differences between commercial acacia mangium tannin and its effluent / Teng Bo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 3 (03/2016)
PermalinkStudies of beamhouse swelling for brine-cured hides given an enzyme soak / Jean J. Tancous in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXXI, N° 11 (11/1996)
PermalinkStudies of the bending behaviour of chrome tanned leather / W. Yu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 4 (07-08/1997)
PermalinkStudies of vegetable tannins. Complete structural determination of two chestnut tannins - vescalagin and castalagin using nuclear magnetic resonance spectroscopic methods / H. R. Tang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 79, N° 6 (11-12/1995)
PermalinkStudies on chamois leather - Tanning using plant oil / S. Hari Krishnan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 6 (11-12/2005)
PermalinkStudies on chamois tanning : An investigation using modified fish oil / S. Hari Krishnan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 2 (02/2005)
PermalinkStudies on combination tanning based on henna and oxazolidine / A. E. Musa in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 10 (10/2009)
PermalinkStudies on further structural stabilisation of the chrome-collagen compound / T. Ramaswamy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 59 (Année 1975)
PermalinkStudies on further structural stabilisation of the chrome-collagen compound / T. Ramaswamy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 59, N° 5 (09-10/1975)
PermalinkStudies on phosphonium based combination tanning : less chrome approach / N. N. Fathima in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 9 (09/2011)
PermalinkStudies on polyurethane polyadducts as retanning materials / R. Prabhu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIV (Année 1989)
PermalinkStudies on tanning with zirconium oxychloride : Part I. Standardization of tanning process / A. Sundarrajan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 3 (03/2003)
PermalinkStudies on tanning with zirconium oxychloride : Part II. Development of a versatile tanning system / Balaraman Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 3 (03/2003)
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