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Recycling lipids extracted from skins in fatliquor formulations / Olga Uhlemann in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVII, N° 10 (10/1992)
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Titre : Recycling lipids extracted from skins in fatliquor formulations Type de document : texte imprimé Auteurs : Olga Uhlemann, Auteur Année de publication : 1992 Article en page(s) : p. 371-379 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A new degreasing process has been studied in our laboratory and scaled up for industrial manufacture. This clean process leads to a complete recovery of fats which can be recycled in fatliquors formulations.
Several steps were required to produce emulsionable fatliquor formulations. First, the extracted fats have been analyzed and characterized qualitatively as well as quantitatively. In order to avoid the problems associated with the chemical production of emulsionable fats, we have opted for a physical process: the emulsification through addition of appropriate surfactants. The selection of surfactants has been based upon the concept of emulsion stability.
Several formulations have been tested at laboratory scale for various kinds of leather (vegetable or mineral tannins). Industrial trials have shown that the process can be scaled up to more important quantities of skins and that it is industrially feasible.En ligne : https://drive.google.com/file/d/19C8I8BASi_dqeXWA66r8qLKjZnrP0vji/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8270
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVII, N° 10 (10/1992) . - p. 371-379[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006898 - Périodique Bibliothèque principale Documentaires Disponible Recycling of raw materials (collagen protein) in the leather industry -high value added application of leather solid waste / Li Chengtao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 5 (09-10/2017)
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Titre : Recycling of raw materials (collagen protein) in the leather industry -high value added application of leather solid waste Type de document : texte imprimé Auteurs : Li Chengtao, Auteur ; Han Mimi, Auteur ; Qiang Taotao, Auteur ; Wang Xuechuan, Auteur Année de publication : 2017 Article en page(s) : p. 237-241 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Collagène
Copolymères greffés
Cuirs et peaux -- Déchets -- Recyclage
Cuirs et peaux -- Propriétés mécaniques
Essais dynamiques
Polymères en émulsion
Polyuréthanes
Retannage
VinyleIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather solid waste, is one of the biggest polluters in the leather industry and it seriously restricts the sustainable development of the industry. In this study, we developed a new technology of preparing a leather retanning agent using collagen protein extracted from solid leather waste and recycled into the leather production process. This collagen based retanning agent, bearing a selective filling property, is a potential solution to reduce differentiation between different locations of the leather. The leather, after retanning treatment, is full and has very good mechanical performances, such as tensile strength and tear strength. Thus, the new research has opened up new windows for the treatment of solid leather waste presenting recycling utilisation in the leather industry. Note de contenu : - MATERIALS AND METHODS : Collagen extracted from leather solid waste - Vinyl monomer grafting to the modified collagen retanning - Waterborne polyurethane grafting modified collagen retanning agent - The application of collagen-based retanning agent in leather
- RESULTS AND DISCUSSION : Characterisation of collagen-based retanning agent - The detection of retanning properties - Organoleptic properties of leatherEn ligne : https://drive.google.com/file/d/1d8cGTDHSQ3Rbeqd-9HsyA4KIjOYb8OFo/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29238
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 5 (09-10/2017) . - p. 237-241[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19275 - Périodique Bibliothèque principale Documentaires Disponible Recycling of unhairing lime liquors / K. Eldin A. Mohamaed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 3 (05-06/2003)
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Titre : Recycling of unhairing lime liquors Type de document : texte imprimé Auteurs : K. Eldin A. Mohamaed, Auteur ; G. A. Gasmelseed, Auteur Année de publication : 2003 Article en page(s) : p. 116-118 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chaulage
Chaux Sulfurée
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de moutons
Déchets industriels -- Recyclage
Eaux usées -- Analyse
Eaux usées -- Recyclage
Epilage
Produits chimiques -- Consommation -- Réduction
Recyclage (déchets, etc.)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study concerns the re-cycling of used sulphide-lime unhairing liquors in order to reduce pollution, save fresh water and minimize the cost of the liming process. Chemical analyses of the used liquor indicated that a considerable amount of sulphide (2100 mg/l) was present. As lime has a limited solubility (0.125%), un-dissolved lime is always present. This un-dissolved lime will dissolve when its equilibrium solubility is disturbed by recycling. It has been observed that the unhairing power of an old lime liquor was greater than that of a fresh liquor Wet salted sheepskins were processed according to the normal recipe and the once-used lime solution was analysed for lime and sulphide content, its composition was adjusted with a make-up fresh lime-sulphide liquor and recycled. The same was repeated for eight cycles, each time the recycled liquor analyses were adjusted with a fresh make-up.
The average savings were 65% sodium sulphide, 33% lime and 90% water. The limed-unhaired pelts from each cycle were further processed through tannage, retannage, drying, and finishing. The physical and chemical properties were satisfactory. The leather produced is normal, soft, of good tensile strength, full and of good quality.
We recommended this process to all tanneries, its application is simple. It requires a collection pit, a filter, a pump and a pipeline to and from the drums.Note de contenu : - Micro scale trials
- Semi- production scale trials
- Table 1 : Analyses of fresh and used lime-sulphide liquors
- Table 2 : Total residual amounts of sulphide, lime and pH of recyled liquors
- Table 3 : Comparison of recycling and conventional method
- Table 4 : Degree of swelling and efficiency of unhairing
- Table 5 : Comparsion of recycling and conventional unhairing method
- Table 6 : Chemical analyses of leather
- Table 7 : Physical properties of leatherEn ligne : https://drive.google.com/file/d/141rhLzXxhN-BortNESxQ76VLxxozlvfy/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39788
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 3 (05-06/2003) . - p. 116-118[article]Recycling of unhairing liquors from a sheepskin tannery by ultrafiltration system / L. M. Silva in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 5 (09-10/2001)
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Titre : Recycling of unhairing liquors from a sheepskin tannery by ultrafiltration system Type de document : texte imprimé Auteurs : L. M. Silva, Auteur ; M. J. Almeida, Auteur ; J. Gomes, Auteur ; A. M. Anselmo, Auteur Année de publication : 2001 Article en page(s) : p. 167-170 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux de moutons
Eaux usées -- Recyclage
Epilage
FiltrationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The work reported refers to the application of ultrafiltration to spent unhairing liquors from a low production scale Portuguese tannery. dealing mainly with sheepskins.
A set of trials with an ultrafiltration pilot were carried out aiming to study the continuous recycling of permeate and the evaluation of total savings.
Although good savings were attained (67 % water. 58 % for sulphide and 53 % for lime), a fair average permeate flux was obtained (38 litres rn2 hour). Because of the capital and operational costs associated with membrane technologies the obtained results showed that good practical permeate fluxes (higher than 40 litres/m2/hour) and process volumes higher than 10 m3/day are important conditions for the economic viability of’ the process.Note de contenu : - Table 1 : Summary of permeate recycling trials
- Table 2 : Accumulated resrIts for permeate recycling trials
- Table 3 : Analytical results obtained for permeate recycling trials
- Table 4 : Analytical results obtained in one UF trial of unhairing liquor from the same tannery
- Table 5 : Total consumptions and savings attained with UF
- Table 6 : Economic savings attained with UF
- Table 7 : Projected operating economics for ultratiltering spent unhairing liquorsEn ligne : https://drive.google.com/file/d/15-PQJF7mKAE7ash0tJmAVqqzujosq1DC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40231
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 5 (09-10/2001) . - p. 167-170[article]
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Titre : Red rot in historic leather Type de document : texte imprimé Année de publication : 2011 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acides
Antiquités (objets anciens) -- Conservation et restauration
Cuirs et peaux -- Conservation
Cuirs et peaux -- Détérioration
Mimosa et constituants
Tannage végétalIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Acid-deterioration (commonly known as red-rot in leather) occurs in vegetable tanned leathers that were predominantly manufactured from the mid 19th century onwards, and is observed in a variety of historic leather artefacts, such as bookbinding leather, gilt leather, screens, wall hangings, upholstery and luggage. Acid-deteriorated leathers are acidic (pH>-3.0) and show a lower shrinkage temperature (Ts), which may be as low as 30°C. The visible changes in the deteriorated leather usually include fine cracking, a powdery surface with complete or partial loss of the grain layer (shown in figure 1).
The following two factors are considered to be responsible for acid-deterioration in leather.Note de contenu : - Materials and methods
- Artificial ageing
- Sample preparation
- Determination of shrinkage temperature (Ts) and pHEn ligne : https://drive.google.com/file/d/1tjlMzrLkgbosK6AsKInVz25DaLDoyju-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11918
in LEATHER INTERNATIONAL > Vol. 213, N° 4814 (09/2011)[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13270 - Périodique Bibliothèque principale Documentaires Disponible Redevelopment of medieval leathers for the curragh "Brendan's" transatlantic voyage 1976-77 / H. A. Birkin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
PermalinkRedevelopment of medieval leathers for the curragh "Brendan's" transatlantic voyage 1976-77 / H. A. Birkin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 3 (05-06/1978)
PermalinkPermalinkReducing chemical consumption and waste water COD loadings by recycling in conjunction with membrane filtration / K. Hellinger in WORLD LEATHER, Vol. 14, N° 7 (11/2001)
PermalinkReducing the risk of grain damage during bating of leather manufacturing : an alternative to pancreatic enzymes with alkaline protease from novel Bacillus Subtilis SCK6 / Li Fuyi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 9 (09/2020)
PermalinkReducing the use of volatile organic compounds in the leather industry / Rosa M. Cuadros in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 1 (01-02/2016)
PermalinkReducing water and chemicals / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 42 (07-08/2020)
PermalinkReduction of Cr (VI) formation in leather with herbal extracts / Roza Mirzamuratova in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 2 (02/2024)
PermalinkReduction of emissions in finishing by appropriate preliminary work and selected products / H. Will in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXII (Année 1987)
PermalinkReduction of yellowing effect on leathers with UV absorber benzophenone-4 / Safiye Meric Acikel in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 1 (01-02/2016)
PermalinkA reexamination of the aging of organ leather / Kevin Carr in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 6 (06/2017)
PermalinkRefining 'bucket chemistry' through vessel automation / Steve Hodges in WORLD LEATHER, Vol. 15, N° 4 (06-07/2002)
PermalinkReflections on research / A. W. Landmann in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 2 (03-04/2003)
PermalinkRéflexions sur la transformation des peaux de bovins / Hans Herfeld in TECHNICUIR, (Années 1969-1970)
PermalinkRéflexions sur la transformation des peaux de bovins / H. Herfeld in TECHNICUIR, (Années 1969-1970)
PermalinkRéflexions sur la transformation des peaux de bovins / H. Herfeld in TECHNICUIR, (Années 1969-1970)
PermalinkRegenerating leather waste for flexible pressure sensing applications / Jie Lei in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 1 (Année 2019)
PermalinkRegeneration of raw hide water balance by electrochemically activated water / A. H. Danylkovych in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 10 (10/2020)
PermalinkRegion wise surface level defect detection and ranking of crust leather images based on image processing techniques / S. Nithiyanantha Vasagam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 7 (07/2023)
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