Recovery of Solubilized Rhodium from Hydroformylated Vegetable Oils and Their Methyl Esters
نویسنده
چکیده
AND SUMMARY Procedures were developed to extract rhodium from hydroformylated vegetables oils and methyl esters. Among the numerous reagents surveyed, a q u eous hydrogen cyanide with triethanolamine (TEA) was found to be most effective. The effects of time, temperature, and concentration of reagents were stUdied. Over 98% of the solubilized rhodium was removed from crude methyl formylstearate at 100 C for I hr with 0.5% hydrogen cyanide, 5% water, and 0.5% TEA. Over 98% of the solubilized rhodium was also extracted from hydroformylated soybean and safflower methyl esters; however, 1% hydrogen cyanide, 10% water, and 0.62% TEA had to be used. Only 90% of the rhodium was removed from hydroformylated soybean oil. The reagents used can be adpated to a continuous extraction procedure.
منابع مشابه
Acyl Esters from Oxo-Derived Hydroxymethylstearates as Plasticizers for Polyvinyl Chloride
Hydroxymethylstearates were made by hydroformylation or oxo reaction of monoand polyunsaturated fats and esters with either rhodium-triphenylphosphine or cobalt carbonyl catalysts. Rhodium-oxo products were hydrogenated with nickel catalyst, whereas, cobalt-oxo products were heated directly under hydrogen pressure. Hydroxymethyl fatty alcohols also were prepared by a two-step copper-cmomite hyd...
متن کاملBiodiesel production from vegetable oils by supercritical methanol
Transesterification of vegetable oils in supercritical methanol are carried out without using any catalyst. Methyl esters of vegetable oils or biodiesels have several outstanding advantages among other new-renewable and clean engine fuel alternatives and can be used in any diesel engine without modification. The most important variables affecting the methyl ester yield during the transesterific...
متن کاملElucidation of structural isomers from the homogeneous rhodium-catalyzed isomerization of vegetable oils.
The structural isomers formed by the homogeneous rhodium-catalyzed isomerization of several vegetable oils have been elucidated. A detailed study of the isomerization of the model compound methyl linoleate has been performed to correlate the distribution of conjugated isomers, the reaction kinetics, and the mechanism of the reaction. It has been shown that [RhCl(C8H8)2]2 is a highly efficient a...
متن کاملMCPD fatty acid esters in vegetable oils: formation, analysis and toxicology
3-monochoropropane-1, 2-diol (3-MCPD) and 2-monochloropropane-1,3-diol (2-MCPD) and glycidol esters (GE) have been known as food contaminants. These compounds are formed during high-temperature process of different food products such as coffee, edible oils, infant formula, potato based products, bakery products, malt, cooked meats, soy sauces and pickles. In vegetable oils, these compounds are ...
متن کاملResearch on Possible Supplying Ship Diesel Engines with Alternative Fuels
The paper presents introduction to the research on possible supplying ship diesel engines with mixtures of diesel oils and vegetable oils or their esters with accounting for ecological aspects – exhaust gas purity. Characteristics of vegetable oils and their esters are compared with those diesel oils. Consequences of their application to diesel engines, mainly for their working process and exha...
متن کامل