Documents disponibles écrits par cet auteur

La Complex@Fe–pILM offering resilient option for efficient and green processing toward epoxidation of cyclohexene / Guru Bishwa Bidita Varadwaj in Industrial & engineering chemistry research, Vol. 50 N° 15 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 8973–8982 Titre : La Complex@Fe–pILM offering resilient option for efficient and green processing toward epoxidation of cyclohexene Type de document : texte imprimé Auteurs : Guru Bishwa Bidita Varadwaj, Auteur ; Swagatika Sahu, Auteur ; Kulamani Parida, Auteur Année de publication : 2011 Article en page(s) : pp. 8973–8982 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Epoxidation Résumé : An overview focused on the synthesis, structural features, and catalytic applications of lanthanum salen complex heterogenized in iron pillared montmorillonite is described here. In this approach the pillaring species was introduced in the interlayers of montmorillonite by a simple cation-exchange mechanism. The material on subsequent calcination resulted in the formation of iron pillared montmorillonite. Consequently, lanthanum salen complex was intercalated into the porous structure of iron pillared montmorillonite. The prima facie evidence of pillaring and complex anchorage inside the pillared clay was established by various spectroscopic and analytical characterization techniques. The heterogeneous catalyst was identified to promote the cyclohexene epoxidation reaction very efficiently with tert-butylhydroperoxide (TBHP) as the oxidant, affording the desired product with a yield up to 95%. Again the reusability of the catalyst and its stability were investigated from its postcatalytic XRD and FT-IR analysis, which intimated that the catalyst could be reused up to four times without any reconditioning and loss of activity. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395843 [article] La Complex@Fe–pILM offering resilient option for efficient and green processing toward epoxidation of cyclohexene [texte imprimé] / Guru Bishwa Bidita Varadwaj, Auteur ; Swagatika Sahu, Auteur ; Kulamani Parida, Auteur . - 2011 . - pp. 8973–8982. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 8973–8982 Mots-clés : Epoxidation Résumé : An overview focused on the synthesis, structural features, and catalytic applications of lanthanum salen complex heterogenized in iron pillared montmorillonite is described here. In this approach the pillaring species was introduced in the interlayers of montmorillonite by a simple cation-exchange mechanism. The material on subsequent calcination resulted in the formation of iron pillared montmorillonite. Consequently, lanthanum salen complex was intercalated into the porous structure of iron pillared montmorillonite. The prima facie evidence of pillaring and complex anchorage inside the pillared clay was established by various spectroscopic and analytical characterization techniques. The heterogeneous catalyst was identified to promote the cyclohexene epoxidation reaction very efficiently with tert-butylhydroperoxide (TBHP) as the oxidant, affording the desired product with a yield up to 95%. Again the reusability of the catalyst and its stability were investigated from its postcatalytic XRD and FT-IR analysis, which intimated that the catalyst could be reused up to four times without any reconditioning and loss of activity. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395843

Facile method for the synthesis of phosphomolybdic acid supported on zirconia – ceria mixed oxide and its catalytic evaluation in the solvent - free oxidation of benzyl alcohol / Sujata Mallick in Industrial & engineering chemistry research, Vol. 51 N° 23 (Juin 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 7859–7866 Titre : Facile method for the synthesis of phosphomolybdic acid supported on zirconia – ceria mixed oxide and its catalytic evaluation in the solvent - free oxidation of benzyl alcohol Type de document : texte imprimé Auteurs : Sujata Mallick, Auteur ; Surjyakanta Rana, Auteur ; Kulamani Parida, Auteur Année de publication : 2012 Article en page(s) : pp. 7859–7866 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Oxide  Catalytic  evaluation Résumé : A series of phosphomolybdic acid (5–20 wt % PMA) promoted zirconia–ceria (ZrO2–CeO2) mixed oxides were synthesized by an impregnation method and characterized by XRD, nitrogen adsorption/desorption, UV–vis DR spectroscopy, TPR/TPD, and 31P MAS NMR spectroscopy. NMR spectra revealed that the catalyst retained the Keggin structure of PMA even after calcination at 500 °C. The catalysts were screened for the solvent-free liquid-phase oxidation of benzyl alcohols using hydrogen peroxide as the oxidizing agent. The sample of 15 wt % PMA/ZrO2–CeO2 showed 85% conversion and 96% selectivity to the corresponding aldehydes. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2022724 [article] Facile method for the synthesis of phosphomolybdic acid supported on zirconia – ceria mixed oxide and its catalytic evaluation in the solvent - free oxidation of benzyl alcohol [texte imprimé] / Sujata Mallick, Auteur ; Surjyakanta Rana, Auteur ; Kulamani Parida, Auteur . - 2012 . - pp. 7859–7866. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 7859–7866 Mots-clés : Oxide  Catalytic  evaluation Résumé : A series of phosphomolybdic acid (5–20 wt % PMA) promoted zirconia–ceria (ZrO2–CeO2) mixed oxides were synthesized by an impregnation method and characterized by XRD, nitrogen adsorption/desorption, UV–vis DR spectroscopy, TPR/TPD, and 31P MAS NMR spectroscopy. NMR spectra revealed that the catalyst retained the Keggin structure of PMA even after calcination at 500 °C. The catalysts were screened for the solvent-free liquid-phase oxidation of benzyl alcohols using hydrogen peroxide as the oxidizing agent. The sample of 15 wt % PMA/ZrO2–CeO2 showed 85% conversion and 96% selectivity to the corresponding aldehydes. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2022724

Liquid phase hydrodechlorination of chlorobenzene over bimetallic supported zirconia catalyst / Sujata Mallick in Industrial & engineering chemistry research, Vol. 50 N° 22 (Novembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12439-12448 Titre : Liquid phase hydrodechlorination of chlorobenzene over bimetallic supported zirconia catalyst Type de document : texte imprimé Auteurs : Sujata Mallick, Auteur ; Surjyakanta Rana, Auteur ; Kulamani Parida, Auteur Année de publication : 2012 Article en page(s) : pp. 12439-12448 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Catalyst  Liquid  phase Résumé : Mesoporous zirconia was prepared by the surfactant-assisted route, using cetyltrimethylammonium bromide as cationic surfactant. The synthesized zirconia was employed as support for copper and nickel bimetallic catalysts in the hydrodehalogenation reaction of chlorobenzenes and substituted chlorobenzenes at room temperature. The catalysts were characterized by nitrogen adsorption-desorption, X-ray powder diffraction, Fourier-transfer infrared spectroscopy (FTIR), transmittance electron micrograph (TEM), UV-vis diffuse reflectance spectroscopy (UV—vis DRS), temperature programmed reduction (TPR), and X-ray photoelectron spectroscopy (XPS). The nitrogen adsorption—desorption studies revealed that the modified samples retain the mesoporosity. TEM studies showed uniform distribution of metals having 5-10 nm particles size on the support surface. The bimetallic catalyst exhibited a higher H2 chemisorption capacity relative to monometallic catalysts. For catalytic hydrodehalogenation of chlorobenzene, bimetallic catalyst showed 95% conversion with 100% selectivity for benzene as compared to monometallic catalysts, indicative of the synergy effect of copper, nickel supported on zirconia. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745717 [article] Liquid phase hydrodechlorination of chlorobenzene over bimetallic supported zirconia catalyst [texte imprimé] / Sujata Mallick, Auteur ; Surjyakanta Rana, Auteur ; Kulamani Parida, Auteur . - 2012 . - pp. 12439-12448. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12439-12448 Mots-clés : Catalyst  Liquid  phase Résumé : Mesoporous zirconia was prepared by the surfactant-assisted route, using cetyltrimethylammonium bromide as cationic surfactant. The synthesized zirconia was employed as support for copper and nickel bimetallic catalysts in the hydrodehalogenation reaction of chlorobenzenes and substituted chlorobenzenes at room temperature. The catalysts were characterized by nitrogen adsorption-desorption, X-ray powder diffraction, Fourier-transfer infrared spectroscopy (FTIR), transmittance electron micrograph (TEM), UV-vis diffuse reflectance spectroscopy (UV—vis DRS), temperature programmed reduction (TPR), and X-ray photoelectron spectroscopy (XPS). The nitrogen adsorption—desorption studies revealed that the modified samples retain the mesoporosity. TEM studies showed uniform distribution of metals having 5-10 nm particles size on the support surface. The bimetallic catalyst exhibited a higher H2 chemisorption capacity relative to monometallic catalysts. For catalytic hydrodehalogenation of chlorobenzene, bimetallic catalyst showed 95% conversion with 100% selectivity for benzene as compared to monometallic catalysts, indicative of the synergy effect of copper, nickel supported on zirconia. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745717

Schiff base Pt(II) complex intercalated montmorillonite / Kulamani Parida in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 7849–7856 Titre : Schiff base Pt(II) complex intercalated montmorillonite : a robust catalyst for hydrogenation of aromatic nitro compounds at room temperature Type de document : texte imprimé Auteurs : Kulamani Parida, Auteur ; Guru Bishwa Bidita Varadwaj, Auteur ; Swagatika Sahu, Auteur Année de publication : 2011 Article en page(s) : pp. 7849–7856 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Hydrogenation  Catalyst  Montmorillonite Résumé : Room temperature and atmospheric pressure assisted hydrogenation of aromatic nitro compounds is achieved with a high proficiency over Schiff base Pt(II) complex supported montmorillonite. Usually hydrogenation reactions require severe conditions to crop up. However, our catalyst could alter these extremities exhibiting excellent yields with 100% selectivity. The catalyst was prepared by intercalating Schiff base Pt(II) complex into montmorillonite by simple cation exchange mechanism. The intercalation of the complex inside the clay matrix was supported by various characterization techniques like X-ray diffraction, thermogravimetric and differential thermogravimetric analysis, BET surface area measurement, UV–vis diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy (FT-IR), and atomic absorption spectroscopy. The stability of the catalyst during the course of the reaction was confirmed from its post catalytic FT-IR analysis. The catalyst could be reused three times without noticeable loss of its catalytic activity. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332108 [article] Schiff base Pt(II) complex intercalated montmorillonite : a robust catalyst for hydrogenation of aromatic nitro compounds at room temperature [texte imprimé] / Kulamani Parida, Auteur ; Guru Bishwa Bidita Varadwaj, Auteur ; Swagatika Sahu, Auteur . - 2011 . - pp. 7849–7856. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 7849–7856 Mots-clés : Hydrogenation  Catalyst  Montmorillonite Résumé : Room temperature and atmospheric pressure assisted hydrogenation of aromatic nitro compounds is achieved with a high proficiency over Schiff base Pt(II) complex supported montmorillonite. Usually hydrogenation reactions require severe conditions to crop up. However, our catalyst could alter these extremities exhibiting excellent yields with 100% selectivity. The catalyst was prepared by intercalating Schiff base Pt(II) complex into montmorillonite by simple cation exchange mechanism. The intercalation of the complex inside the clay matrix was supported by various characterization techniques like X-ray diffraction, thermogravimetric and differential thermogravimetric analysis, BET surface area measurement, UV–vis diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy (FT-IR), and atomic absorption spectroscopy. The stability of the catalyst during the course of the reaction was confirmed from its post catalytic FT-IR analysis. The catalyst could be reused three times without noticeable loss of its catalytic activity. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332108