Biodiesel derived raw glycerol represent a copious and inexpensive source which can be used as raw material for a variety of value added products such as 1,3-propanediol, poly hydroxyalkanoate, hydrogen, epichlorohydrin and also lactic acid. So, this work was investigated to study chemical conversion of biodiesel derived raw glycerol and lauric acid to triglycerides of lauric acid via esterification reaction over cellulose sulfuric acid as an efficient, biodegradable and recyclable solid acid catalyst. Synthesized catalyst was characterized by fourier transform infra-red spectroscopy (FT-IR) as well as BET surface area analysis. While, synthesized triglyceride of lauric acid was fittingly characterized by FT-IR as well as 1H and 13C Nuclear magnetic resonance spectroscopic techniques.
of fatty acid ethyl ester synthesis in liver of mice treated with ethanol inhalation ().
First literature use of the term biodiesel in a Chinese paper by Wang R et al.
Synthesis of Biodiesel from Waste Cooking Oil
described the mechanism of the regulation of lipogenesis by fatty acids in measuring the rate of synthesis of fatty acid synthase in mouse liver ().
Holman RT et al.
Transesterification - Wikipedia
of the antioxidant properties of tocopherols ().
First synthesis of linoleic acid ()
Kurz H used ethyl alcohol to derivatize fatty acids (FA ethyl esters) beforetheir analysis ().
First data on cholesterol and fatty acid metabolism after using an isotope of hydrogen(deuterium) in mice and chicks ().
Using deuterated acetate, Sonderhoff R et al. have shown that it serves asa precursor for sterols including ergosterol in yeast ().
Paul Karrer received the
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discovered the essentiality of thelong-chain polyunsaturated fatty acids (linoleic and linolenic acids) ().
Anderson RJ reported the presence of inositol in lipids of tubercle bacilli ().
First demonstration of the biosynthesis of vitamin A from
In the transesterification mechanism, ..
described the first synthesis of linoleic acid () and linolenic acid ().
Reiser R demonstrated that the high levels of saturated fatty acids in ruminantanimal fat are due to the hydrogenation of the dietary unsaturated fatty acidsin the rumen ().
Asselineau J elucidated the structure of mycolic acids (
THE MECHANISM FOR THE ESTERIFICATION REACTION
Biodiesel was prepared from WCO by three-step method, in three-step method aqueous sodium hydroxide solution was used for saponification. The optimum molar ratio for saponification by aqueous sodium hydroxide was 1:2 oil to NaOH and reaction time was 2.0h at 100°C. In acidification the molar ratio of soap to hydrochloric acid was 1:2 for sodium soap. In Esterification the optimum molar ratio of methanol to FFA was 6:1, the catalyst (HCl) concentration is 5wt% of FFA, the reaction temperature was 60°C and the reaction time was 2 hour, with silica gel reaction time was reduced to 80 min and FFA content was reduced to 0.94%. A factorial design was applied to find the optimum conditions for esterification reaction. At optimum conditions 99.06% conversion of the FFA to FAME was obtained and the viscosity, yield were 3.29mm2/s and 79% wt/wt. The properties of produced biodiesel such as viscosity, specific gravity, cloud point, pour point, flash point etc. are nearest to the petro-diesel. The present experimental results support that produced biodiesel from WCO by this method can be successfully used as diesel.