Ultrasound assisted vegetable tannin extraction from myrobalan nuts for leather application / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 2 (02/2018)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 2 (02/2018) . - p. 53-58 Titre : Ultrasound assisted vegetable tannin extraction from myrobalan nuts for leather application Type de document : texte imprimé Auteurs : Venkatasubramanian Sivakumar, Auteur ; A. Princess, Auteur ; C. Veena ; R. Lakshmi Devi Année de publication : 2018 Article en page(s) : p. 53-58 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Eau Essais (technologie) Extraction par solvant Extraction par ultrasons Myrobalan et constituants Tanins végétaux Tannage végétal -- Analyse Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Ultrasound (US) assisted preparation of tannins from Terminalia Chebula nuts (myrobalan) through solid-liquid extraction process using water as solvent even dispensing with conventional heating/stirring is presented in this paper. The results indicate there is a significant enhancement in myrobalan extraction due to the influence of US, in extract %yield and tannin contents respectively as compared to different control processes (static/stirring). Whereas, ultrasound probe at 120 W in 50°C water bath gave the best overall %yield and tanning content. Some of the important scale-up parameters could be a significant savings of 427,184 and 188 kg per ton of raw material usage as extrapolated values based on Lab-scale results in terms of % yield, tannin content and tanning agent offer respectively due to the use of US as compared to control process. The process involves : i). Clean technology with physical activation (US) in aqueous medium at ambient condition - no additional chemicals ii). Green and Eco-benign process with natural materials - useful in all extract applications, iii. Tannins extract as generic product for better functional properties, iv). Better diffusion of plant extract through skin matrix in tanning process for leather making, v). Sustainable solution and ecoconservation through better yields Note de contenu : - EXPERIMENTAL : Experimental Set up - Experimental Procedure - Tanning Trials - Analytical methods - Quantitative analysis of tannin content - RESULTS AND DISCUSSIONS : Myrobalan extraction in ultrasonic tank - Effect of extraction in US probe - Effect of US power, temperature and stirring in extration - Enhancement factors for myrobalan extraction with ultrasound - Effect of distance of material from US probe tip - Mechanism tor the ultrasound assisted extraction - Two-stage extraction - Efficacy of extract in tanning process - Experimental results and process scale-up considerations En ligne : https://drive.google.com/file/d/1Nfgs9Mp-HnCkG6Q4zlf4t-oXsI-oBK3b/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29951 [article]

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