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Accelerated liming process using phase transfer catalyst / N. Vedaraman in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 5 (05/2016)
[article]
Titre : Accelerated liming process using phase transfer catalyst Type de document : texte imprimé Auteurs : N. Vedaraman, Auteur ; K. V. Sandhya, Auteur ; K. C. Velappan, Auteur ; Chellappa Muralidharan, Auteur Année de publication : 2016 Article en page(s) : p. 171-177 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Catalyse par transfert de phase
Chaulage
Cuirs et peaux de chèvres
Gonflement (physique)
Hydroxyde de tétraméthylammonium
Productivité
Travail de rivière (cuir)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In the present work, effect of using phase transfer catalysts (PTC) was studied in liming and re-liming processes of goat skin, for decrease in the processing time, thereby increasing productivity. Three different Phase Transfer Catalysts; Tetramethylammonium Hydroxide (TMAH), Tetraethylammonium Hydroxide (TEAH) and Tetrabutylammonium Hydroxide (TBAH) were chosen and experiments were conducted on liming and re-liming of goat skin to select suitable catalyst in comparison with the conventional liming process. The monitoring parameters were ease of hair removal and increase in pelt weight to find the maximum swelling and plumping. After determining the optimal PTC amount, studies were also carried out on reuse of liquor containing PTC with replenishment. Use of TMAH in liming process was found to bring about significant time reduction and could bring improved swelling in liming and re-liming processes. Note de contenu : - EXPERIMENTAL : Materials - Method - Liming of goat skin using three different phase transfer catalysts - Optimization of amount of TMAH required for liming process - Reusing of lime liquor with additional TMAH replenishment - The effect of TMAH in re-liming of goat skin - Reusing of relime liquor with additional TMAH replenishment
- RESULTS AND DISCUSSION : Average value of three experiments - Average value of three evaluationsEn ligne : https://drive.google.com/file/d/17eQLi6rCFWCWdf0pdsh3ByZsXHrPt3Sh/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26218
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Code-barres Cote Support Localisation Section Disponibilité 18051 - Périodique Bibliothèque principale Documentaires Disponible Adaptation des procédés de fabrication en mégisserie. Economie de produit et d'énergie / M. Aloy in TECHNICUIR, N° 4 (04/1979)
[article]
Titre : Adaptation des procédés de fabrication en mégisserie. Economie de produit et d'énergie Type de document : texte imprimé Auteurs : M. Aloy, Auteur ; P. Bouchard, Auteur ; G. Gavend, Auteur ; Arlette Folachier, Auteur ; Bernard Vulliermet, Auteur Année de publication : 1979 Article en page(s) : p. 59-75 Note générale : Bibliogr. Langues : Français (fre) Catégories : Déchets -- Réduction
Eau
Economies d'énergie
Pollution -- Lutte contre
Tannage
Travail de rivière (cuir)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Après la présentation de la mégisserie française : localisation, types de peaux travaillées, structure professionnelle, ce deuxième article étudie, opération par opération, les procédés de fabrication et leur modification possible en vue de réduire la pollution et de réaliser des économies en produit et en énergie. Note de contenu : - TRAVAIL DE RIVIÈRE : Le reverdissage - Sabrage - Délainage, Pelanage
- LES OPÉRATIONS DE TANNAGE : Déchaulage, confitage - Picklage - Dégraissage - Tannage
- ÉCONOMIES DE PRODUITS ET D’ÉNERGIE AU NIVEAU DES OPÉRATIONS DE CORROYAGE-FINISSAGE : Généralités - Les opérations à caractère physico-chimique - Les opérations à caractère mécanique
- TECHNIQUES DE TRAITEMENT ADAPTÉES A LA MÉGISSERIE : Prétraitement - Traitements physico-chimiques - Traitement des bouesEn ligne : https://drive.google.com/file/d/1mnEB6s5oVIlxBTB1qSX2t2z-wZ99cwXV/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22683
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Code-barres Cote Support Localisation Section Disponibilité 009126 - Périodique Bibliothèque principale Documentaires Disponible Ammonia nitrogen in tannery wastewater : distribution, origin and prevention / Yanan Wang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 2 (02/2012)
[article]
Titre : Ammonia nitrogen in tannery wastewater : distribution, origin and prevention Type de document : texte imprimé Auteurs : Yanan Wang, Auteur ; Yunhang Zeng, Auteur ; Xiaowei Chai, Auteur ; Xuepin Liao, Auteur ; Qiang He, Auteur ; Bi Shi, Auteur Année de publication : 2012 Article en page(s) : p. 40-49 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Eaux usées -- Analyse
Eaux usées -- Teneur en azote ammoniacal
Travail de rivière (cuir)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Tannery wastewater usually contains a high content of ammonia nitrogen (NH3-N), which increases the difficulty of wastewater treatment. The objective of this work is to investigate the distribution of NH3-N in wastewaters from beamhouse processes and analyze the origin of NH3-N in each operation, so that the strategies that can reduce NH3-N at the origin could be suggested. Not surprisingly, the results demonstrate that NH3-N mainly concentrates in deliming and bating wastewaters due to the addition of ammonium salts in these two operations. This problem can be solved by using non-ammonia deliming and bating agents. A small quantity of NH3-N arises from washing and soaking processes because of decomposition of proteins by microorganisms. But the NH3-N in washing and soaking wastewaters may considerably increase when skins are badly preserved or the microorganisms in soaking float are not properly inhibited. Therefore, the effective antibacterial measures are important to diminish the production of NH3-N in beamhouse processes. As for unhairing/liming process, NH3-N in wastewater is mainly originated from hydrolysis of proteins, such as keratin and collagen, by strong alkali. Hair-saving unhairing and pelt swelling under milder conditions favor the decrease of NH3-N discharge. In fact, the amount of organic nitrogen released from washing, soaking and liming processes is much more than NH3-N. The experimental results indicate that the organic nitrogen mainly results from non-collagen proteins and their hydrolysates. This means the discharge of organic nitrogen is difficult to be avoided, and it may constitute a threat to end-of-pipe treatment of NH3-N. Note de contenu : - EXPERIMENTAL : Materials - Determination of NH3-N in beamhouse wastewaters - Determination of NH3- content in leather chemicals - Effect of curing time on NH3-N concentration in washing wastewater - Effect of soaking time on NH3-N concentration in soaking wastewater - Analysis of origin of NH3-N in unhairing/liming wastewater - Effect of reliming time on NH3-N concentration in reliming wastewater - Determination of TN and hydroxyproline in beamhouse wastewaters - Analysis of origin of TN in unhairing/liming wastewater - Analysis of origin of TN in deliming wastewater - Analytical methods : Ammonia nitrogen - Total nitrogen - Hydroxyproline
- RESULTS AND DISCUSSION : Distribution of NH3-N in wastewaters of pig skin beamhouse processes - Distribution of NH3-N in wastewaters of cattle hide beamhouse processes - Origin of NH3-N in initial washing and soaking wastewaters - Origin of NH3-N in unhairing/liming wastewater - Origin of NH3-N in reliming wastewater - Relationship between TN and NH3-N in beamhouse wastewatersEn ligne : https://drive.google.com/file/d/12alRCA2Lr5eBz6sPv3YF4X4vui_ZBxhV/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13569
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Code-barres Cote Support Localisation Section Disponibilité 13693 - Périodique Bibliothèque principale Documentaires Disponible 13824 - Périodique Bibliothèque principale Documentaires Disponible Annual reports on specific topics in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 70 (Année 1986)
[article]
Titre : Annual reports on specific topics Type de document : texte imprimé Année de publication : 1986 Article en page(s) : p. 61-64 Langues : Anglais (eng) Catégories : Atmosphère -- Pollution
Boues résiduaires
Chimie analytique
ConfitageLe confitage est une action biochimique effectuée au moyen de produits enzymatiques, qui a pour but de dégrader les fibres élastiques, contribuant ainsi à augmenter la souplesse du cuir. En outre, les enzymes complètent la dégradation des résidus épidermiques, donnant ainsi une fleur plus propre et plus lisse.
Cuirs et peaux -- Déchets
Eaux usées -- Recyclage
Liqueurs de tannage
Travail de rivière (cuir)Index. décimale : 675 Technologie du cuir et de la fourrure Note de contenu : 1. WASTE WATERS : Beamhouse operations (from soaking to bating) - Pickling and tanning - Waste water treatment - Criteria for discharges - Analytical methods - Recycling of process liquors
2. SOLID WASTES : Untanned wastes - Tanned wastes - Sludges
3. AIR POLLUTION
4. CHARGES
5. CO-OPERATION WITH THE INTERNATIONAL COUNCIL OF TANNERSEn ligne : https://drive.google.com/file/d/1cINisJU1bP8NoRqAarWtWSUf3nllxBLi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9208
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Code-barres Cote Support Localisation Section Disponibilité 007133 - Périodique Bibliothèque principale Documentaires Disponible Application of an enzymatic bate from local materials / M. M. Ahmed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 4 (07-08/2003)
[article]
Titre : Application of an enzymatic bate from local materials Type de document : texte imprimé Auteurs : M. M. Ahmed, Auteur ; G. A. Gasmelseed, Auteur Année de publication : 2003 Article en page(s) : p. 135-137 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Confitage enzymatique
Cuirs et peaux -- Propriétés chimiques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de chèvres
Cuirs et peaux de moutons
Travail de rivière (cuir)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Over the years the enzymatic bating process for both hides and skins has become indispensable, it renders the leather soft, resilient and smooth. The basic raw materials for a bate have ranged from dog dung and pigeon faeces to synthetic enzymes.
The application of the formerly used natural materials was difficult and the quality of the leather produced was not reproducible and was inconsistent. The skins might be over -bated or under -bated depending on the activity of the bate and the enzyme content of the material used.
The current material used for the preparation of a bate is cow pancreas, blended with a carrier substance at a suitable concentration giving an activity of about 1300 units. The leather produced using such materials is compared with that produced using a widely applied commercial bating material (Oropon, Rohm and Haas) with regard to quality, strength and softness. Various compositions were used starting from 0.5% at increments of 0.25% to 1.5% based on limed weight.
These trials were compared with a controlled experiment using 0.5% of the commercial bating material which has a strength of 1500 units as checked by the method of analysis adopted in this work (Appendix A).
72 wet-salted sheep and goat skins were divided equally into two groups, each group contained 6 skins of either type.
The skins of the two groups were processed through soaking, unhairing, liming deliming, bating, pickling, chrome tannage, retannage, drying, and finishing.
The leather produced is of good quality and it does not differ from the leather produced using imported bating materials.Note de contenu : - Producing the bate
- Experimental work
- Results and discussion : Summary of production - Application and results
- Table 1 : Factors and their levels
- Table 2 : Physical properties sheepskins
- Table 3 : Physical properties of goat skins
- Table 4 : Chemical properties of sheep skinsEn ligne : https://drive.google.com/file/d/1X0u0JoI8LOtbwsilfsGczdL9N62JX3XD/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39768
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 4 (07-08/2003) . - p. 135-137[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Bating - unleashing 'hidden' area / TFL Ledertechnik GmbH (Weil/Rhein, Germany) in LEATHER INTERNATIONAL, Vol. 213, N° 4812 (07/2011)
PermalinkBio-polymers from leather shavings / Jordi Escabros in LEATHER INTERNATIONAL, Vol. 215, N° 4831 (06/2013)
PermalinkBiotech in the beamhouse : how probiotics make the beamhouse more sustainable and productive in INTERNATIONAL LEATHER MAKER (ILM), N° 38 (11-12/2019)
PermalinkCattle hide in the beamhouse / Enrique Comes / Barcelona [Spania] : Cromogenia Linits (2015)
PermalinkPermalinkPermalinkPermalinkCleaner processing of leather and its wastes / James Kanagaraj / Saarbrücken [Germany] : Lambert Academic Publishing (2010)
PermalinkCollagen fiber opening of cattle hides in urea/calcium hydroxide solutions / Qian Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 5 (05/2021)
PermalinkPermalinkPermalinkDéfauts de peau et influence des opérations de tannerie-mégisserie sur le nettoyage des articles en cuir / K. Boroyan in TECHNICUIR, N° 7 (08-09/1979)
PermalinkEffect of hyaluronic acid on the properties of chrome-tanned leather / M. A. R. Siddique in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 2 (03-04/2015)
PermalinkEfficient and eco-friendly beamhouse chemicals / Franck Diaz in LEATHER INTERNATIONAL, Vol. 213, N° 4811 (06/2011)
PermalinkElectrochemically assisted drum processing in the beamhouse / Shan Zhihua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 1 (01-02/2017)
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