ABSTRACT Molecular dynamics (MD) simulation of [Cd(II)] along with nitrate ions and water in dode... more ABSTRACT Molecular dynamics (MD) simulation of [Cd(II)] along with nitrate ions and water in dodecane was carried out for different nitric acid concentrations. The extraction process using N,N,N’,N’-tetraoctyldiglycolamide (TODGA) and tributyl phosphate (TBP), in biphasic systems, is also simulated at three nitric acid concentrations. In the TBP-based system, the formation of a third phase was observed at 3 M nitric acid concentration. Cd(II) ions form reverse micelles-like clusters with TODGA as an extractant in dodecane. The mass percentage of TODGA in these clusters decreases with increase in the acid concentration while increasing the size of the aggregates at the same time.
The molecular dynamics (MD) simulation of TODGA in n-dodecane shows formation of nanostructures o... more The molecular dynamics (MD) simulation of TODGA in n-dodecane shows formation of nanostructures of TODGA aggregates with nitric acid and water. These aggregates are dispersed in dodecane phase or form well defined reverse micelles grown sufficient in size depending on the acid concentration. With increasing nitric acid concentration, aggregation number of TODGA in reverse micelles also increases which, however, is independent of TODGA concentration. Aggregation number rises from 2 to 8 in presence of 0–3.5 M nitric acid in corresponding aqueous phase. The formation of the aggregates explains remarkable acid co-extraction from aqueous phase to organic dodecane phase by TODGA.
... 36253644, 2003 Precipitation of Curcuminoids from Hydrotrope Solutions: Crystal Nucleation a... more ... 36253644, 2003 Precipitation of Curcuminoids from Hydrotrope Solutions: Crystal Nucleation and Growth Kinetics from Batch Experiments Deepak V. Dandekar and Vilas G. Gaikar* Institute of Chemical Technology, University of Mumbai, Matunga, Mumbai, India ABSTRACT ...
Http Dx Doi Org 10 1080 01496390600674810, Feb 15, 2007
... DOI: 10.1080/01496390600674810 Kiran P. Akre a & Vilas G. Gaikar a * pages 1593-1617. Ava... more ... DOI: 10.1080/01496390600674810 Kiran P. Akre a & Vilas G. Gaikar a * pages 1593-1617. Available online: 15 Feb 2007. ...
Separation of phenylenediamines (PDAs) was attempted using a combination of selective solubilizat... more Separation of phenylenediamines (PDAs) was attempted using a combination of selective solubilization in an organic solvent and then adsorption from nonaqueous solutions on commercial acidic ion-exchange resins. Toluene was the best solvent for selective solubilization and also for the subsequent sorption of the amines by an acidic ion-exchange resin having sulfonic acid groups on the styrene-divinylbenzene backbone. The equilibrium sorption studies showed very selective sorption of the amines with a high loading capacity on the resin. The uptake of the amines was reinforced by Lewis acid–base interaction between the lone pair of electrons on the nitrogen of the amine and the sulfonic acid group of the resin. In the sorption studies involving mixtures, p-PDA was selectively adsorbed. Molecular mechanics calculations confirm the existence of the acid–base interactions.
Industrial Engineering Chemistry Research, Aug 25, 2009
... The impure forskolin fraction was further crystallized to isolate pure forskolin. Recently, S... more ... The impure forskolin fraction was further crystallized to isolate pure forskolin. Recently, Saleem et al.(9) have reported a similar process for the isolation of pure forskolin. ... Sodium salicylate (Na-Sal) was obtained from Swastik Pharmaceuticals, Mumbai. ...
ABSTRACT Molecular dynamics (MD) simulation of [Cd(II)] along with nitrate ions and water in dode... more ABSTRACT Molecular dynamics (MD) simulation of [Cd(II)] along with nitrate ions and water in dodecane was carried out for different nitric acid concentrations. The extraction process using N,N,N’,N’-tetraoctyldiglycolamide (TODGA) and tributyl phosphate (TBP), in biphasic systems, is also simulated at three nitric acid concentrations. In the TBP-based system, the formation of a third phase was observed at 3 M nitric acid concentration. Cd(II) ions form reverse micelles-like clusters with TODGA as an extractant in dodecane. The mass percentage of TODGA in these clusters decreases with increase in the acid concentration while increasing the size of the aggregates at the same time.
The molecular dynamics (MD) simulation of TODGA in n-dodecane shows formation of nanostructures o... more The molecular dynamics (MD) simulation of TODGA in n-dodecane shows formation of nanostructures of TODGA aggregates with nitric acid and water. These aggregates are dispersed in dodecane phase or form well defined reverse micelles grown sufficient in size depending on the acid concentration. With increasing nitric acid concentration, aggregation number of TODGA in reverse micelles also increases which, however, is independent of TODGA concentration. Aggregation number rises from 2 to 8 in presence of 0–3.5 M nitric acid in corresponding aqueous phase. The formation of the aggregates explains remarkable acid co-extraction from aqueous phase to organic dodecane phase by TODGA.
... 36253644, 2003 Precipitation of Curcuminoids from Hydrotrope Solutions: Crystal Nucleation a... more ... 36253644, 2003 Precipitation of Curcuminoids from Hydrotrope Solutions: Crystal Nucleation and Growth Kinetics from Batch Experiments Deepak V. Dandekar and Vilas G. Gaikar* Institute of Chemical Technology, University of Mumbai, Matunga, Mumbai, India ABSTRACT ...
Http Dx Doi Org 10 1080 01496390600674810, Feb 15, 2007
... DOI: 10.1080/01496390600674810 Kiran P. Akre a & Vilas G. Gaikar a * pages 1593-1617. Ava... more ... DOI: 10.1080/01496390600674810 Kiran P. Akre a & Vilas G. Gaikar a * pages 1593-1617. Available online: 15 Feb 2007. ...
Separation of phenylenediamines (PDAs) was attempted using a combination of selective solubilizat... more Separation of phenylenediamines (PDAs) was attempted using a combination of selective solubilization in an organic solvent and then adsorption from nonaqueous solutions on commercial acidic ion-exchange resins. Toluene was the best solvent for selective solubilization and also for the subsequent sorption of the amines by an acidic ion-exchange resin having sulfonic acid groups on the styrene-divinylbenzene backbone. The equilibrium sorption studies showed very selective sorption of the amines with a high loading capacity on the resin. The uptake of the amines was reinforced by Lewis acid–base interaction between the lone pair of electrons on the nitrogen of the amine and the sulfonic acid group of the resin. In the sorption studies involving mixtures, p-PDA was selectively adsorbed. Molecular mechanics calculations confirm the existence of the acid–base interactions.
Industrial Engineering Chemistry Research, Aug 25, 2009
... The impure forskolin fraction was further crystallized to isolate pure forskolin. Recently, S... more ... The impure forskolin fraction was further crystallized to isolate pure forskolin. Recently, Saleem et al.(9) have reported a similar process for the isolation of pure forskolin. ... Sodium salicylate (Na-Sal) was obtained from Swastik Pharmaceuticals, Mumbai. ...
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