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Extraction of aleuritic acid from seedlac and purification by reactive adsorption on functionalized polymers / Shobha K. Nagappayya in Industrial & engineering chemistry research, Vol. 49 N° 14 (Juillet 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 14 (Juillet 2010) . - pp. 6547–6553 Titre : Extraction of aleuritic acid from seedlac and purification by reactive adsorption on functionalized polymers Type de document : texte imprimé Auteurs : Shobha K. Nagappayya, Auteur ; Vilas G. Gaikar, Auteur Année de publication : 2010 Article en page(s) : pp. 6547–6553 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Aleuritic  acid  Polymers Résumé : Reactive extraction of aleuritic acid from seedlac was carried out at different NaOH concentrations and temperatures. A mathematical model was proposed for the hydrolysis of seedlac considering the breaking of ester linkages at any position along the length of the polymeric chain. Recovery and purification of aleuritic acid from the product mixture was further achieved by reactive adsorption using weakly basic polymeric resin containing tertiary amino group as the functional group. Aleuritic acid was recovered by continuous column studies with 92% yield and 94% purity. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie902061e [article] Extraction of aleuritic acid from seedlac and purification by reactive adsorption on functionalized polymers [texte imprimé] / Shobha K. Nagappayya, Auteur ; Vilas G. Gaikar, Auteur . - 2010 . - pp. 6547–6553. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 14 (Juillet 2010) . - pp. 6547–6553 Mots-clés : Aleuritic  acid  Polymers Résumé : Reactive extraction of aleuritic acid from seedlac was carried out at different NaOH concentrations and temperatures. A mathematical model was proposed for the hydrolysis of seedlac considering the breaking of ester linkages at any position along the length of the polymeric chain. Recovery and purification of aleuritic acid from the product mixture was further achieved by reactive adsorption using weakly basic polymeric resin containing tertiary amino group as the functional group. Aleuritic acid was recovered by continuous column studies with 92% yield and 94% purity. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie902061e

Hydrotropic extraction process for recovery of forskolin from coleus forskohlii roots / Sanjay P. Mishra in Industrial & engineering chemistry research, Vol. 48 N° 17 (Septembre 2009)

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 17 (Septembre 2009) . - pp. 8083–8090 Titre : Hydrotropic extraction process for recovery of forskolin from coleus forskohlii roots Type de document : texte imprimé Auteurs : Sanjay P. Mishra, Auteur ; Vilas G. Gaikar, Auteur Année de publication : 2009 Article en page(s) : pp. 8083–8090 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Hydrotropic  solubilization  Forskolin  Coleus  forskohlii  root Résumé : A simple and rapid method based on hydrotropic solubilization is developed for isolation of forskolin from coleus forskohlii roots. The plant cells are permeabilized by aqueous hydrotrope solutions followed by extraction and solubilization of forskolin into the hydrotrope solutions of alkyl benzene sulfonates and carboxylates. The solubility of forskolin is increased by 350 times in the hydrotropic solutions and it is possible to recover 85% pure forskolin from the hydrotropic solutions by simple dilution with water. The purity of the recovered forskolin decreased from 85% to 70% on decreasing particle size of the roots. Nearly 80% of the forskolin having 50% purity was recovered from the coleus roots using 2.0 mol/dm3 aqueous sodium cumene sulfonate (Na−CS) solutions at 363 K. Na−CS showed the most efficient solubilization of forskolin from the Coleus roots among all the other hydrotropes. [article] Hydrotropic extraction process for recovery of forskolin from coleus forskohlii roots [texte imprimé] / Sanjay P. Mishra, Auteur ; Vilas G. Gaikar, Auteur . - 2009 . - pp. 8083–8090. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 17 (Septembre 2009) . - pp. 8083–8090 Mots-clés : Hydrotropic  solubilization  Forskolin  Coleus  forskohlii  root Résumé : A simple and rapid method based on hydrotropic solubilization is developed for isolation of forskolin from coleus forskohlii roots. The plant cells are permeabilized by aqueous hydrotrope solutions followed by extraction and solubilization of forskolin into the hydrotrope solutions of alkyl benzene sulfonates and carboxylates. The solubility of forskolin is increased by 350 times in the hydrotropic solutions and it is possible to recover 85% pure forskolin from the hydrotropic solutions by simple dilution with water. The purity of the recovered forskolin decreased from 85% to 70% on decreasing particle size of the roots. Nearly 80% of the forskolin having 50% purity was recovered from the coleus roots using 2.0 mol/dm3 aqueous sodium cumene sulfonate (Na−CS) solutions at 363 K. Na−CS showed the most efficient solubilization of forskolin from the Coleus roots among all the other hydrotropes.

Intensification and selectivity modulation of ion-exchange resin catalyzed alkylation of phenol by microwave / Asraf A. Ali in Industrial & engineering chemistry research, Vol. 50 N° 11 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp 6556–6566 Titre : Intensification and selectivity modulation of ion-exchange resin catalyzed alkylation of phenol by microwave Type de document : texte imprimé Auteurs : Asraf A. Ali, Auteur ; Vilas G. Gaikar, Auteur Année de publication : 2011 Article en page(s) : pp 6556–6566 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Microwave  Kinetic  model  Alkylation  phenol Résumé : Microwave irradiation has been used to intensify the alkylation reaction of phenol with tert-butyl alcohol using ion-exchange resin as the catalyst. About 86% conversion of phenol is obtained in 4 min under microwave irradiation. The major products are ortho-tert-butyl phenol (o-TBP), para-tert-butyl phenol (p-TBP) and 2,4-di-tert-butyl phenol (2,4-DTBP). o-TBP predominates in the product mixture as the kinetically favored product in shorter reaction times, but p-TBP is the major product for longer reaction times. The selectivity toward ortho- or para-substituted phenols can be manipulated by controlling the exposure time of the reaction mixture to the microwave irradiation. The Langmuir–Hinshelwood–Hougen–Watson (LHHW) surface reaction controlled model was used for the kinetic data analysis. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102051k [article] Intensification and selectivity modulation of ion-exchange resin catalyzed alkylation of phenol by microwave [texte imprimé] / Asraf A. Ali, Auteur ; Vilas G. Gaikar, Auteur . - 2011 . - pp 6556–6566. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp 6556–6566 Mots-clés : Microwave  Kinetic  model  Alkylation  phenol Résumé : Microwave irradiation has been used to intensify the alkylation reaction of phenol with tert-butyl alcohol using ion-exchange resin as the catalyst. About 86% conversion of phenol is obtained in 4 min under microwave irradiation. The major products are ortho-tert-butyl phenol (o-TBP), para-tert-butyl phenol (p-TBP) and 2,4-di-tert-butyl phenol (2,4-DTBP). o-TBP predominates in the product mixture as the kinetically favored product in shorter reaction times, but p-TBP is the major product for longer reaction times. The selectivity toward ortho- or para-substituted phenols can be manipulated by controlling the exposure time of the reaction mixture to the microwave irradiation. The Langmuir–Hinshelwood–Hougen–Watson (LHHW) surface reaction controlled model was used for the kinetic data analysis. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102051k

Low molecular weight organogels and their application in the synthesis of CdS nanoparticles / Pradipta Kumar in Industrial & engineering chemistry research, Vol. 51 N° 47 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 47 (Novembre 2012) . - pp. 15374-15385 Titre : Low molecular weight organogels and their application in the synthesis of CdS nanoparticles Type de document : texte imprimé Auteurs : Pradipta Kumar, Auteur ; Mahesh M. Kadam, Auteur ; Vilas G. Gaikar, Auteur Année de publication : 2013 Article en page(s) : pp. 15374-15385 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Nanoparticle Résumé : Two new fatty acid based derivatives containing carboxylate and amide functions with different alkyl chain lengths were synthesized, and their properties as low molecular weight (LMW) gelators for organic solvents such as nitrobenzene, chlorobenzene, dichlorobenzene, and dioxane are evaluated. The xerogels under Scanning Electron Microscope (SEM) show self-assembled fibrillar and flowerlike structures. Rheological properties of the gelator forming an extended fibrillar network were studied to verify the solidlike behavior of the gel. The role of intermolecular hydrogen bonding in the formation of the supramolecular structures was confirmed through FTIR spectroscopy. The nitrobenzene based organogel superstructure was used as a template for synthesis of CdS nanoparticles. The nanoparticles were characterized through UV-vis spectroscopy and Transmission Electron Microscopy (TEM). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26679658 [article] Low molecular weight organogels and their application in the synthesis of CdS nanoparticles [texte imprimé] / Pradipta Kumar, Auteur ; Mahesh M. Kadam, Auteur ; Vilas G. Gaikar, Auteur . - 2013 . - pp. 15374-15385. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 47 (Novembre 2012) . - pp. 15374-15385 Mots-clés : Nanoparticle Résumé : Two new fatty acid based derivatives containing carboxylate and amide functions with different alkyl chain lengths were synthesized, and their properties as low molecular weight (LMW) gelators for organic solvents such as nitrobenzene, chlorobenzene, dichlorobenzene, and dioxane are evaluated. The xerogels under Scanning Electron Microscope (SEM) show self-assembled fibrillar and flowerlike structures. Rheological properties of the gelator forming an extended fibrillar network were studied to verify the solidlike behavior of the gel. The role of intermolecular hydrogen bonding in the formation of the supramolecular structures was confirmed through FTIR spectroscopy. The nitrobenzene based organogel superstructure was used as a template for synthesis of CdS nanoparticles. The nanoparticles were characterized through UV-vis spectroscopy and Transmission Electron Microscopy (TEM). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26679658

Microwave - assisted extraction of forskolin from coleus roots and its purification by adsorptive separation using functionalized polymer designed by molecular simulation / Leena P. Devendra in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9271–9278 Titre : Microwave - assisted extraction of forskolin from coleus roots and its purification by adsorptive separation using functionalized polymer designed by molecular simulation Type de document : texte imprimé Auteurs : Leena P. Devendra, Auteur ; Vilas G. Gaikar, Auteur Année de publication : 2010 Article en page(s) : pp. 9271–9278 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Microwave  Adsorptive  separation  Molecular  simulation Résumé : The extraction of forskolin from Coleus forskohlii roots using organic solvents was facilitated by irradiation of the raw material by microwave and studied for effect of time of irradiation, power level and water soaking of the raw material prior to irradiation on the rate of extraction. Methanol gave 92% extraction of forskolin after 2 min of the irradiation at 160 W under optimized conditions, with simultaneous increase in the rate of extraction. Molecular modeling approach was taken to design a specific adsorbent for selective adsorption of forskolin analogues from the complex extract. The forskolin analogues showed greater affinity toward a diethanolamine-loaded polymer as compared to forskolin. The purification of forskolin by adsorption on diethanolamine substituted polystyrene validated the predictions from molecular simulation. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100495u [article] Microwave - assisted extraction of forskolin from coleus roots and its purification by adsorptive separation using functionalized polymer designed by molecular simulation [texte imprimé] / Leena P. Devendra, Auteur ; Vilas G. Gaikar, Auteur . - 2010 . - pp. 9271–9278. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9271–9278 Mots-clés : Microwave  Adsorptive  separation  Molecular  simulation Résumé : The extraction of forskolin from Coleus forskohlii roots using organic solvents was facilitated by irradiation of the raw material by microwave and studied for effect of time of irradiation, power level and water soaking of the raw material prior to irradiation on the rate of extraction. Methanol gave 92% extraction of forskolin after 2 min of the irradiation at 160 W under optimized conditions, with simultaneous increase in the rate of extraction. Molecular modeling approach was taken to design a specific adsorbent for selective adsorption of forskolin analogues from the complex extract. The forskolin analogues showed greater affinity toward a diethanolamine-loaded polymer as compared to forskolin. The purification of forskolin by adsorption on diethanolamine substituted polystyrene validated the predictions from molecular simulation. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100495u

Purification and recovery of curcuminoids from curcuma ionga extract by reactive sorption using polymeric adsorbent carrying tertiary amine functional group / Anil R. Patil in Industrial & engineering chemistry research, Vol. 50 N° 12 (Juin 2011) 

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Purification of forskolin by adsorptive separation using functionalized polymer bearing specific ligands designed by molecular simulation / Leena P. Devendra in Industrial & engineering chemistry research, Vol. 50 N° 20 (Octobre 2011) 

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Selective removal of silver impurity from oxaliplatin by sorption on functionalized polymer / Pradipta Kumar in Industrial & engineering chemistry research, Vol. 51 N° 43 (Octobre 2012) 

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