Studies on water dispersible products based on sulphitation of wool wax by trichlorosilyl sulphite agent / El-Shahat H. A. Nashy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 5 (09-10/2002)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 5 (09-10/2002) . - p. 212-218 Titre : Studies on water dispersible products based on sulphitation of wool wax by trichlorosilyl sulphite agent Type de document : texte imprimé Auteurs : El-Shahat H. A. Nashy, Auteur ; N. H. El-Sayed, Auteur ; S. S. Elmorsy, Auteur Année de publication : 2002 Article en page(s) : p. 212-218 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Composition chimique Huiles et graisses synthétiques Lanoline Sulfitation Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Wool wax is an industrial by-product which has been investigated for further use in the leather industry. It was treated with trichlorosilyl sulphite (TCSS) as a new reagent to obtain an oil having sulphite groups. Trichlorosilyl sulphite (TCSS) can be generated in situ by the interaction of tetrachlorosilane with sodium sulphite or sodium bisulphite. This forms a basic raw material stock for the development of a range of synthetic fatliquors which can be used in the leather industry equivalent to those based on sulphochlorinated oils. Note de contenu : - MATERIALS AND METHODS : Materials - Methods - Scanning Electron Microscopy - RESULTS AND DISCUSSION : A) - Wool wax acids - B) - USM Composition - 3) - FT-IR - Visual properties of fatliquored leather - Visual properties of fatliquored leather - Scanning Electron Microscopy (SEM) - Table 1 : The physical and chemical characteristics of El-Bieda wool wax. - Table 2 : Composition of wool wax fatty acids - Table 3 : Composition of wool wax USM - Table 4 : Sulphitation of wool wax under different conditions - Table 5 : Visual properties of fatliquored leather En ligne : https://drive.google.com/file/d/1UJnqRYet2KTiIFwP-tsp67_sdpHjdYa-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39861 [article]

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Study of the synthesis of sulfonated and succinated lanolin acid fatliquoring agent / Haojie Qin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 108, N° 2 (03-04/2024)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 108, N° 2 (03-04/2024) . - p. 51-56 Titre : Study of the synthesis of sulfonated and succinated lanolin acid fatliquoring agent Type de document : texte imprimé Auteurs : Haojie Qin, Auteur ; Guoping Qian, Auteur ; Jianghao Wu, Auteur ; Xiaojun Shen, Auteur Année de publication : 2024 Article en page(s) : p. 51-56 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amidation Anhydride maléique Composés organiques -- Synthèse Diéthanolamine Esterification Huiles et graisses synthétiques Lanoline Succination sulfite de sodium Sulfonation Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The sulfonated and succinated lanolin acid fatliquoring agent was prepared from lanolin acid by amidation with diethanolamine, monoesterification with maleic anhydride and sulfonation with anhydrous sodium sulfite. Through single factor experiments, the optimised synthesis conditions were determined as follows: the temperature of amidation reaction was 135°C and the reaction time was 5 hours, the amidation yield could reach 94.4 %. In the monoesterification reaction, the molar ratio of maleic anhydride to theoretical hydroxyl groups of the system was 1:1.1, the reaction temperature was 95°C and the reaction time was 2 hours, and the esterification rate could reach 86.1%. In the sulfonation reaction, the molar ratio of maleic anhydride to sodium sulfite was 1:1.05, the reaction temperature was 80°C and the reaction time was 3 hours. Under the optimised conditions, the yield of product could reach 94.9 %, and the structures were characterised by FTIR spectrum. Note de contenu : - MATERIALS AND METHODS : Materials - Experimental methods - Analytical methods - RESULTS AND DISCUSSION : Effect of reaction temperature and time on - Effect of reaction temperature and time on monoesterification amidation - Effect of molar ratio on monoesterification - Effect of reaction temperature and time on sulfonation - Effect of molar ratio on sulfonation - FTIR analysis - Table 1 : Effect of reaction temperature on the proportion of acylation reaction products En ligne : https://drive.google.com/file/d/1LjuD_diJIOs7QJWzVqBz0Z0iiSKXv0lE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40931 [article]

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