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An innovative new application of hydrogen peroxide to accelerate chamois leather tanning. Part II : Effect of oxidation times on the quality of chamois leather / Ono Suparno in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 5 (05/2013)
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Titre : An innovative new application of hydrogen peroxide to accelerate chamois leather tanning. Part II : Effect of oxidation times on the quality of chamois leather Type de document : texte imprimé Auteurs : Ono Suparno, Auteur ; E. Gumbira-Sa'id, Auteur ; Ika A. Kartika, Auteur ; Muslich, Auteur ; Shiva Amwaliya, Auteur Année de publication : 2013 Article en page(s) : p. 180-187 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de Chamois
Oxydation
Peroxyde d'hydrogèneLe peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales.
TannageTags : Prétannage 'Huile tannage' 'Analyses cuir' Microscopie 'Résistance déchirement' traction' 'Allongement rupture' 'Absorption eau' 'Propriétés chimiques' pH 'Teneur huile' cendres' organoleptiques' Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The use of oxidizing agent, such as hydrogen peroxide, was reported to shorten the oxidation process time of chamois tanning. Appropriate conditions for this tanning are needed in order to improve its process efficiency, and to obtain a satisfactory leather quality. The objectives of our study were to investigate the effects of oxidation times in chamois tanning on the quality of the resulting leather, and to determine the best condition of the oxidation time. The experiments were conducted by tanning pickled goatskin for 4, 6, and 8 hours oxidation times inside a rotary drum, and 1, 2, and 3 days of oxidation times outside the drum. The physical, chemical, and organoleptic properties of the leathers were then tested. This study showed that they fulfilled the quality requirements for chamois leather. The best conditions for oxidation were oxidation times of eight hours inside, and one day outside a rotary drum. Therefore, the use of hydrogen peroxide oxidizing agent shortened the oxidation process outside the rotary drum in chamois leather production from nine to two days. Note de contenu : - EXPERIMENTAL : Materials and equipment - Pretanning - Oil tanning - Microscopic studies - Analyses of leather
- RESULTS AND DISCUSSION : Microscopic studies - Tear strength - Tensile strength - Elongation at break - Water absorption - Chemical properties - pH - Oil content - Ash content - Organoleptic propertiesEn ligne : https://drive.google.com/file/d/1yuQr-YCAsC7h9HrOOXaUYrM0KqU30fdr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18546
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 5 (05/2013) . - p. 180-187[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15060 - Périodique Bibliothèque principale Documentaires Disponible An innovative new application of oxidizing agents to accelerate chamois leather tanning / Ono Suparno in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 12 (12/2011)
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Titre : An innovative new application of oxidizing agents to accelerate chamois leather tanning : Part I : The effects of oxidizing agents on chamois leather quality Type de document : texte imprimé Auteurs : Ono Suparno, Auteur ; E. Gumbira-Sa'id, Auteur ; Ika A. Kartika, Auteur ; Muslich Mubarak, Auteur ; Syahrun Mubarak, Auteur Année de publication : 2011 Article en page(s) : p. 360-366 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux de Chamois
Huile de graine de caoutchouc
Peroxyde d'hydrogèneLe peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales.
TannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A disadvantage of chamois leather tanning practiced nowadays is that its oxidation process takes relatively long time, i.e. 9 to 14 days. The use of an oxidizing agent, such as sodium percarbonate was reported to shorten the tanning oxidation process. However, the price of this oxidizing agent is relatively high; a constraint in its application. Other oxidizing agents, such as hydrogen peroxide, may have the same function of accelerating the process. The objectives of this study were to investigate the effects of type and concentration of oxidizing agents in order to obtain the optimum combination of process acceleration and chamois leather characteristics. This study consisted of the leather tanning with rubber seed oil with oil oxidation comparing two types of oxidizing agents at three concentrations of each oxidizing agents; testing of physical, chemical, and organoleptic properties of the leathers, and microscopic studies of the leathers. The results of this study indicate that hydrogen peroxide could be used as oxidizing agents for the chamois leather manufacture, since the chamois leather produced met the quality standards. The best treatment of this trial was hydrogen peroxide at 6% (w/w based on of the weight of rubber seed oil applied). The use of hydrogen peroxide could shorten the oxidation process from 9-14 days to about three days. Note de contenu : - EXPERIMENTAL : Materials and equipment - Pretanning - Oil tanning - Leather analyses - Microscopic studies
- RESULTS AND DISCUSSION : Tanning process - Chemical properties of leather - pH - Ash content - Oil content - Physical properties of leather (Thickness - Tensile strength - Elongation at break - Tear strength - Water absorption) - Organoleptic properties - Microscopic studiesEn ligne : https://drive.google.com/file/d/1DT0vjhJnwPHCFJ2AYUGuyRc3bh3x2OdG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12897
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVI, N° 12 (12/2011) . - p. 360-366[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13609 - Périodique Bibliothèque principale Documentaires Disponible An integrated approach for the treatment of vegetable tannins wastewaters / Balaraman Madhan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 1 (01-02/2005)
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Titre : An integrated approach for the treatment of vegetable tannins wastewaters Type de document : texte imprimé Auteurs : Balaraman Madhan, Auteur ; Kalarical Janardhanan Sreeram, Auteur ; A. Sharli, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2005 Article en page(s) : p. 9-14 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acacia et constituants
Eaux usées -- Décontamination
Eaux usées -- Epuration
Potentiel zeta
Précipitation (chimie)
Sulfate de zinc
Tanins végétaux
Tannage -- DéchetsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Intensive leather making techniques in an eco-sensitive world have increased the attraction of a tanning system based on natural products such as plant polyphenolics. However, there is also a distinct disadvantage in the usage of such materials because of the high organic loading of the effluent which is also difficult to degrade due to the high oxygen demand. We have examined the treatment of vegetable tannery effluents aiming at the reduction of the pollution load. Two methods have been evaluated, one based on precipitation of tannins as zinc-tannate and another with oxidative degradation after precipitation. In the precipitation method, 0.5% wattle solution at pH10 is precipitated as zinc-tannate giving a 73% reduction in COD. A further reduction of the chemical oxygen demand by 97% has been obtained with the two-stage approach of precipitation followed by oxidative degradation in the presence of an immobilized iron catalyst. This integrated approach provides a viable solution to the problem of vegetable tannins in wastewaters. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Zeta potential measurements - Precipitation treatment - Two-step treatment - Treatment of industrial samples
- RESULTS AND DISCUSSION : Treatment by precipitation method - Two-step treatment - Treatment of commercial vegetable tannin wastewater - Commercial scale treatment
- Table 1 : Effect of pH on COD reduction of vegetable tannin solution
- Table 2 : % Reduction of COD on precipitation of vegetable tannins with different amounts of zinc sulphate
- Table 3 : COD of 0.5% wattle solution before and after treatment
- Table 4 : COD of the commercial vegetable tannery wastewater before and after treatmentEn ligne : https://drive.google.com/file/d/1acFfI8-TAPuL5jjhh6K6TocBI1xyk5b6/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39608
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 1 (01-02/2005) . - p. 9-14[article]An investigation into differences in properties of leathers produced from chrome recycling and conventional chrome tannage / D. A. Boast in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 73 (Année 1989)
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Titre : An investigation into differences in properties of leathers produced from chrome recycling and conventional chrome tannage Type de document : texte imprimé Auteurs : D. A. Boast, Auteur Année de publication : 1989 Article en page(s) : p. 164-167 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A set of chrome recycling trials have been carried out, to determine the extent of the influence that chrome recycling has on the colour and properties of the resultant leathers.
Initially chrome recycle liquor was obtained from a commercial tannery that had been continuously chrome recycling for a period of 18 months. A total of 8 cycles were then carried out at LIRI, using 4 sides per cycle, with the matching sides being processed by a conventional chrome tannage.
The chrome contents of the matching wet blue sides were very similar and the influence that chrome recycling had on the final leather colour, dyed medium brown, was from no difference (66 %) of sides) to slightly lighter (34 %).En ligne : https://drive.google.com/file/d/1e-lRK8hp0ztgzSb4JuMkh1M3KPzFcHxH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8855
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Code-barres Cote Support Localisation Section Disponibilité 007136 - Périodique Bibliothèque principale Documentaires Disponible An investigation of the ethiopian tanning industry's competitiveness / Fitsum Etefa Ahmed in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 2 (02/2023)
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Titre : An investigation of the ethiopian tanning industry's competitiveness Type de document : texte imprimé Auteurs : Fitsum Etefa Ahmed, Auteur ; Melkamu Mengistenew Teshome, Auteur ; Awoke Fenta Wodag, Auteur ; Aragaw Bizualem Kassie, Auteur ; Tamrat Tesfaye, Auteur ; Kefyalew Alemayehu Wondmagegn, Auteur ; Lwubtujuibe Lwubtuguha, Auteur ; Hailekiros Debesay, Auteur ; Lijalem Melie Tesfaw, Auteur Année de publication : 2023 Article en page(s) : p. 59-66 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Compétitivité (économie politique)
Cuirs et peaux -- Industrie -- Ethiopie
Tanneries -- EthiopieIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Ethiopia’s leather development plan has prioritized the tanning industry in order to accelerate the sector’s growth. The aim of this study is to identify the factors that allow and prohibit Ethiopian tanning industries from coping with competitive challenges, as well as the competitive advantages and drawbacks that the tanning industry faces.The study followed a primary and secondary data collection methods, which included both qualitative and quantitative approaches. In the study, 13 functioning tanneries in the country involved in leather production from 2020 to 2021 were investigated. The study data were collected through distributing structured questionnaire and having interviews with tanning industry top management body (i.e. managers, directors, and heads). The study results are presented in forms of the mean and standard deviation. The study findings revealed that the tanning industry competitiveness is low due to different determinates factors. With the exception of the country’s natural resource endowment in hides and skins and low labor cost availability, all determinants of competitiveness (raw material, infrastructure, skilled labor, industry and institution linkage, capital and managerial capability, and government policy) are found to be insignificant. Similarly, the tanning industry’s ability to use its cost advantage in raw hides and skins and maintain its market share on the domestic and international market is limited by poor quality of locally supplied raw material, lack of strong supporting institutions and association’s, lack of infrastructure, capital and managerial capability, poor industry and institution linkage as well as factors such as scarcity of skilled labor and raw materials (chemicals and spare parts). In order to enhance the competitiveness of the tanning industry in the country, the industry, government and stakeholders need to work in collaboration in creating strong supporting industries, fulfilling infrastructure, providing investment capital, and supplying experienced managers and skilled workers. Note de contenu : - METHODOLOGY : Data collection
- RESULTS AND DISCUSSION : Method of data processing and analysis - General information of respondent - General information of the tanning industry - Tanning industry ownership status - Analysis of determinant factors of competitiveness - Raw material determinant factors of competitivness - Infrastructure determinant factors of competitiveness - Industry and institution linkage determinant factors of competitiveness - Skilled labor determinant factors of competitiveness - Government policy dterminant factors of competitiveness : Government policy as a factor - Fapital and managerial capability determinant factors of competitiveness - Competitiveness measure factors
- Table 1 : Respondent position in the tanning industries
- Table 2 : Name and place of the tanning industries available
- Table 3 : Ownership of tanning industry
- Table 4 : The degree of mean scores based on the criteria for clas interval scale rating
- Table 5 : Raw material determinant factors of competitiveness
- Table 6 : Infrastructure determinant factors of competitiveness
- Table 7 : Industry and institution linkage determinant factors of competitiveness
- Table 8 : Skilled labor determinant factors of competitiveness
- Table 9 : Government policy determinant factors of competitiveness
- Table 10 : Capital and managerial capability determinant factors of competitivnesss
- Table 11 : Competitiveness measure factorsEn ligne : https://drive.google.com/file/d/1rrySHeKtEQaX7818mtvQm1zToRLg2jtl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38812
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Code-barres Cote Support Localisation Section Disponibilité 23871 - Périodique Bibliothèque principale Documentaires Disponible An investigation on chicken leg skin for the preparation of fashionable leather and leather products / R. Karthikeyan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 6 (06/2017)
PermalinkAn oil tanning process accelerated by oxidation with sodium percarbonate / Hongru Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 5 (09-10/2008)
PermalinkAnaerobic-aerobic treatment of vegetable tanning waste / Michael H. Tunick in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXX (Année 1985)
PermalinkAnaerobic digestion at high sulfate concentrations / C. A. Jackson-Moss in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)
PermalinkAnaerobic digestion of tannery sludge : lowering salinity to reduce sludge volume / J. P. Barnard in WORLD LEATHER, Vol. 18, N° 7 (11/2005)
PermalinkPermalinkPermalinkAnalyses of nitrogen metabolism functional microbial community in aerobic tanks of hydrolysis acidification and multistage aerobic process for tannery wastewater / Ding Shaolan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 12 (12/2018)
PermalinkAnalysis of Al2O3 in solutions and leathers. Part 1 : Fast complexometric method for determination of Al2O3 in residual solutions from vegetable-aluminum tanning / L. Costadinnova in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 5 (09-10/2006)
PermalinkAnalysis of Al2O3 in solutions and leathers. Part 2 : Complexometric method for determination of Al2O3 in aluminum and plant-aluminum tanned leathers / T. Kolusheva in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 6 (11-12/2006)
PermalinkAnalysis of Al2O3 in solutions and leathers. Part 3 : Spectrophotometric method for determination of Al2O3 in vegetable-aluminum tanned leathers / T. Kolusheva in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 1 (01-02/2007)
PermalinkAnalysis of gallotannin in sumac. Part 1 : Titrimetric method for determination of gallotanin in sumac extract / L. Costadinnova in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 6 (11-12/2007)
PermalinkAnalysis of gallotannin in the tanning substances of sumac. Part 2 : Titrimetric method for the determination of gallotannin in residual / T. Kolusheva in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 1 (01-02/2008)
PermalinkAnalysis of release of free formaldehyde originated from THP salt tannages in leather by high performance liquid chromatography : origanum onites essential oil as free formaldehyde scavenger / Eser Eke Bayramoglu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 11 (11/2013)
PermalinkAnalysis of vegetable tannin absorption during the tannage of hide/hide power / Mariliz Gutterres in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 7 (07/2007)
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