Showing papers on "Sterculia foetida published in 2012"
TL;DR: In this article, the preparation of biodiesel from S. foetida oil using sodium hydroxide as catalyst was reported and the resultant biodiesel was evaluated for physico-chemical properties.
Abstract: Sterculia foetida oil contains cyclopropene fatty acids namely 8,9-methylene-heptadec-8-enoic acid (malvalic) and 9,10-methylene-octadec-9-enoic acid (sterculic) to an extent of 50–55%. The present study reports the preparation of biodiesel from S. foetida oil using sodium hydroxide as catalyst. The resultant biodiesel was evaluated for physico-chemical properties namely iodine value (72.6), free fatty acids (0.17%), phosphorous content (0 ppm), flash point (179 °C), cloud point (3 °C), pour point (3 °C), viscosity at 40 °C (4.72 cSt), oxidative stability at 110 °C (3.42 h), density (0.850 g/cm3 at 15 °C), and trace metals (Group I metals 0.21 ppm). The properties were compared with that of sunflower, soybean and rapeseed oil-based biodiesels and found to be comparable except for the pour point.
69 citations
TL;DR: In this article, the authors report optimization and kinetic studies on the extraction of Sterculia foetida seed oil and process optimization for biodiesel production from the same seed oil.
Abstract: This article reports optimization and kinetic studies on extraction of Sterculia foetida seed oil and process optimization for biodiesel production from the same. The oil extraction follows first-o...
49 citations
TL;DR: In this article, an experimental study to modify Sterculia foetida L. oil (STO) or the corresponding methyl esters to branched ester derivatives is reported, which involves conversion of the cyclopropene rings in the fatty acid chains of STO through various catalytic as well as stoichiometric reactions.
Abstract: An experimental study to modify Sterculia foetida L. oil (STO) or the corresponding methyl esters (STO FAME) to branched ester derivatives is reported. The transformations involve conversion of the cyclopropene rings in the fatty acid chains of STO through various catalytic as well as stoichiometric reactions. Full conversion of the cyclopropene rings was obtained using DielsAlder chemistry involving cyclopentadiene in water at 40 degrees C without the need for a catalyst. Olefin metathesis reactions were performed using a Grubbs 2nd generation catalyst and cyclopropene ring conversion was =99 and 54 mol% with 2,3-dimethyl-2-butene and 1-octene, respectively. Oxidation reactions were performed using established epoxidation (Sharpless) and dihydroxylation (Prilezhaev) protocols using aqueous hydrogen peroxide as the oxidant. For both reactions, full conversion of the cyclopropene rings was obtained at RT to yield the corresponding a,beta-unsaturated ketone in good selectivities. Rearrangement reactions of the cyclopropene rings to the corresponding conjugated diene were successfully performed using homogeneous and heterogeneous palladium catalysts. Excellent conversions (=99%) were obtained using homogeneous palladium catalyst in a biphasic cyclohexanewater mixture (1:1) at 90 degrees C. Relevant cold flow properties of all products were determined and compared to crude STO and STO FAME. Best results were obtained for the metathesis products of STO with 1-octene, with a cloud point (CP) and pour point (PP) of -12 degrees C.
6 citations
01 Jan 2012
TL;DR: The present study has shown the hidden potentiality of S. foetida, Sterculiaceae for its medicinal and economical importance.
Abstract: Medicinal trees have been used both in the prevention and cure of various diseases of human and their pets with the advent of human civilization. Many system of therapy have been developed primarily based on plant. Plant polysaccharides comply with many requirements expected of pharmaceutical excipients such as non toxicity, stability, availability and renewability. They are extensively investigated for use in the development of solid dosage forms. Several medicinal trees and their products are still in home remedies and they represent a substantial proportion of the global drug market. These medicinal plants gain further importance in the region where modern medical health facilities are either not available or not easily accessible. Sterculia foetida L. Sterculiaceae is a tree with digitately lobed leaves, 5-7 leaflets, elliptic, margin entire, flowers in axillary panicles. The edible seeds eaten roasted or fried; seed used as adulterant for cocao; seed are also eaten as purge/dewormer; oil from seeds have uses in local culinary and traditional medicine; oil as an illuminate; fiber obtain from the bark used as cord; pulpwood; timber yields gum or glue used in bookbinding; fire wood and charcoal. In this context, the present study has shown the hidden potentiality of S. foetida, Sterculiaceae for its medicinal and economical importance.
6 citations