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Auteur R. Ramesh |
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Direct chrome liquor recycling under indian conditions : Part 1. Role of chromium species on the quality of the leather / Kalarical Janardhanan Sreeram in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 6 (06/2005)
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Titre : Direct chrome liquor recycling under indian conditions : Part 1. Role of chromium species on the quality of the leather Type de document : texte imprimé Auteurs : Kalarical Janardhanan Sreeram, Auteur ; T. Ramasami, Auteur ; Balachandran Unni Nair, Auteur ; Chandra Babu Narasimhan Kannan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; R. Ramesh, Auteur Année de publication : 2005 Article en page(s) : p. 233-242 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The direct recycling of chrome liquor in pickle or tanning bath is gaining importance in the management of chromium and total dissolved solids in tanneries. Earlier studies indicate that the pre-acidification of the chrome liquor avoids surface fixation of chromium, thereby resulting in quality leathers. This assumes significance as it alters the charge and species-wise composition of the chrome liquor. In this study, the influence of pre-acidification pH on the nature of chromium (III) species and the resulting affect on the quality of leathers has been investigated The results obtained in this study indicate that a pre-acidification of spent chrome liquor to a pH of 1.0 results in the formation of larger percentage of lower charged species, thereby avoiding the surface fixation of chromium. The organoleptic properties, chromium distribution, and SEM analysis of the leathers processed using direct recycling methodology after pre-acidification of the spent chrome liquor to pH 1.0 indicates that the quality of leathers is not impaired. There is no significant influence of the pre-acidification pH on the pollution load. En ligne : https://drive.google.com/file/d/1J-Rnt9HMf407aWjtQ-HKnQqeRA73qMDH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4063
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. C, N° 6 (06/2005) . - p. 233-242[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 002324 - Périodique Bibliothèque principale Documentaires Disponible Efficient salt recovery and total dissolved solids reduction in leather processing / Vasudevan Preethi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 4 (04/2006)
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Titre : Efficient salt recovery and total dissolved solids reduction in leather processing Type de document : texte imprimé Auteurs : Vasudevan Preethi, Auteur ; Praveen Kumar Sehgal, Auteur ; R. Ramesh, Auteur ; Chandra Babu Narasimhan Kannan, Auteur Année de publication : 2006 Article en page(s) : p. 117-122 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A major portion of total dissolved solids (TDS) in leather processing is contributed by common salt (sodium chloride) coming into the effluent during soaking of salt preserved raw hides and skins. If we can prevent or reduce the common salt going into water in the soaking operation, then TDS contributed by sodium chloride can be reduced considerably. TDS reduction is feasible when preserved skins are shaken intermittently in a saturated brine solution. The salt present in the preserved skins is removed and settles to the bottom of the saturated brine solution. The removed salt (from skin) is collected after decantation of the saturated brine solution. The collected salt is washed with fresh saturated brine solution and dried. It can be reused for preservation of skins. The contaminated saturated brine solution is regenerated and recycled again for the next operation. En ligne : https://drive.google.com/file/d/1RzN1VAb8-QDDrSzwpWts4KZvLIhGtmaN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4014
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CI, N° 4 (04/2006) . - p. 117-122[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 004230 - Périodique Bibliothèque principale Documentaires Disponible Fe(III)-Cr(III) combination tannage for the production of soft leathers / R. Karthikeyan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 12 (12/2007)
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Titre : Fe(III)-Cr(III) combination tannage for the production of soft leathers Type de document : texte imprimé Auteurs : R. Karthikeyan, Auteur ; R. Ramesh, Auteur ; R. Usha, Auteur ; B. Ramanaiah, Auteur ; Chandra Babu Narasimhan Kannan, Auteur Année de publication : 2007 Article en page(s) : p. 383-392 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : There has been a constant search for safer tanning methods for use in leather processing. Due to their similarity in aqueous chemistry, Fe(III) salts are often considered potential alternatives for Cr(III) tanning salts. But Fe(III) tanning methods have certain limitations, which have come in the way of their use in the leather industry. One of the main problems is that iron tanned leathers are less amenable to the production of soft leathers such as garment and gloving leather. In the present study, an attempt has been made to overcome the problems associated with iron tanning for the production of goat suede and sheep nappa garment leathers. A judicious combination with chromium has been attempted and a tanning system that affords good quality leathers at the same time helps in restricting the amount of chromium and iron in the spent liquor to less than 100 mg/L has been standardized. The scanning electron microscopic analysis was carried out on the tanned leathers to study the effect of the new system on the structural characteristics of leathers produced. The strength properties and the color characteristics of the tanned leathers were also analyzed and reported. En ligne : https://drive.google.com/file/d/1w6F9Lp-M7mj7o1RzRGuxXlwasp_mFe_e/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3315
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CII, N° 12 (12/2007) . - p. 383-392[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008989 - Périodique Bibliothèque principale Documentaires Disponible 009740 - Périodique Bibliothèque principale Documentaires Disponible A non-destructive evaluation of fluffiness of leather / M. Muthukrishnan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 8 (08/2017)
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Titre : A non-destructive evaluation of fluffiness of leather Type de document : texte imprimé Auteurs : M. Muthukrishnan, Auteur ; S. M. Jaimohan, Auteur ; M. D. Naresh, Auteur ; R. Ramesh, Auteur ; Rathinam Aravindhan, Auteur ; N. K. Chandrababu, Auteur Année de publication : 2017 Article en page(s) : p. 263-269 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Confort
Contrôle non destructif
Cuirs et peaux -- Analyse
MesureIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Many of the comfort related properties of leather are generally assessed subjectively by experience sorters. Fluffiness is one such comfort related property of leather which not only gives volume to the leather, but provides insulation because of entrapped air. The testing method reported in this paper is a new concept in the objective measurement of the fluffiness of leather which is non-destructive in nature and should be valuable to the leather industry. Note de contenu : - Objective assessment
- Porosity
- Fluffiness mapping
- Internal structureEn ligne : https://drive.google.com/file/d/16mYPw_Dy3m7hNmNVwkAQ3CFR54-eOf8Q/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28825
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 8 (08/2017) . - p. 263-269[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19156 - Périodique Bibliothèque principale Documentaires Disponible The renaissance of Fe(III) as self-tanning agent / R. Karthikeyan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 4 (07-08/2011)
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Titre : The renaissance of Fe(III) as self-tanning agent Type de document : texte imprimé Auteurs : R. Karthikeyan, Auteur ; R. Ramesh, Auteur ; R. Venba, Auteur ; Usha Ramamoorthy, Auteur ; Chandra Babu Narasimhan Kannan, Auteur Année de publication : 2011 Article en page(s) : p. 171-176 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acides gras
Couleur -- Analyse
Fer trivalent
Microscopie électronique à balayage
Polycarboxylates
TannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Iron tanning is considered an alternative due to close similarity between the aqueous chemistry of Cr(III) and Fe(III). This arises primarily from the hydrolitic behaviour of Fe(III) complexes. An attempt has been made in the present study to improve the stability of Fe(III) comple by chelation with suitable ligand in order to increase the shrinkage temperature of the leather. An Fe(III) based tanning system which involves a treatment with a fatty acid and a polycarboxylate has been standardized to produce leather with shrinkage temperature (Ts)>100°C. Scanning electron microscopy on the tanned leathers was used to study the structural characteristics of leathers produced. A comparative colour analysis was studied against standard chrome leather to reveal the dyeing and colour characteristics of the proposed tanning system. The excess neutral salt used in the developed process has the tendency to reduce the acidity of the metal ion, which produces iron-tanned leather with strength properties comparable to those of chrome-tanned leather. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Standardization of Fe(III) based self-tanning method - Determination of shrinkage temperature - Determination of Fe(III) in spent tan liquors - Wet finishing for the leathers - Scanning electron microscopy - Physical testing and visual assessment - Colour measurement.
- RESULTS AND DISCUSSION : Standardization of Fe(III) based self-tanning - Structural characterization of iron tanned leather - Physical testing and visual assessment data - Colour characteristics.En ligne : https://drive.google.com/file/d/1f7HyKj30Xc_nrwppK8EAztYFe7bWT64Q/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11861
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 4 (07-08/2011) . - p. 171-176[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013212 - Périodique Bibliothèque principale Documentaires Disponible Using a mobile chiller for hides : a green method to resolve the TDS problem / Chandra Babu Narasimhan Kannan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 5 (09-10/2012)
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