ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Liquid polyesters of raffinose (raffinose polyesters, RPE) were synthesized by a one-stage solvent-free interesterification of raffinose un-decaacetate (RUAC) and fatty acid methyl esters (FAME) of salad oils, long chain fatty acids and blends thereof. Interesterification was essentially a low temperature, low pressure process consisting of forming a homogenous melt of RUAC and FAME in the presence of an alkali metal catalyst (2% sodium). RPE were formed with 95.8–99.3% yield based on initial weight of RUAC. Formation of RPE was evaluated with thin layer chromatography (TLC) and RPE composition determined by transesterification with 1.0 M methanolic NaOH, followed by TLC and gas liquid chromatography (GLC). The structure of RPE was confirmed by both infrared (IR) and nuclear magnetic resonance (C-13 NMR) spectroscopy. Physical properties of the synthesized RPE were similar to physical properties of sucrose polyesters (SPE), conventional salad and vegetable oils. Synthesis of RPE catalyzed by sodium metal appeared to be a deacetylation-acylation process.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1987.tb05881.x
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