The Synthesis Of Epoxy Fatty Acid Methyl Ester Catalyzed By Heterogeneous Catalyst Of Amino Sulfonic Acid

Epoxy fatty acid methyl ester is a kind of new environment-friendly plasticizers, usuallyprepared by vegeTab.oil by transesterification followed by epoxidation. Ester exchangereaction can be catalyzed by homogeneous acid, alkali or heterogeneous acid, alkali as catalyst,epoxidation catalysts for proton acid, from the angle of green chemistry, selecting aheterogeneous acid used as catalytic transesterification and epoxidation reaction, not onlysimplifies the operation procedure, improve the catalytic efficiency, but also reduces theseparation of product in the process of loss, after the completion of the reaction catalystseparation, recovery and from the reaction system.The amino acid of heterogeneous catalytic synthesis of epoxy rapeseed oil, waste oil fattyacid methyl ester process was studied, using gas chromatography and infrared spectroscopy ofthe products were quantitatively detected and qualitative analysis. The main contents of thispaper include:First, rapeseed oil, waste oil and methanol were catalyzed by sulfamic acid catalysis,respectively by ester exchange synthesis of fatty acid methyl ester. When using rapeseed oilas raw material, the yield of methyl esters reached95%under the conditions of methanol/oilmole ratio of6:1,60℃, reaction time20minutes, and catalyst dosage (catalyst/oil) of1.0%.When using waste oil as raw material, the yield of methyl esters reached87.5%under theconditions of methanol/oil mole ratio of8:1,65℃, reaction time30minutes, and catalystdosage (catalyst/oil) of1.0%. The structures of rapeseed oil and biodiesel were characterizedby infrared spectra, and the compositions of the biodiesel were analyzed by gaschromatography.Second, transesterification reactor, through the in situ preparation of formic acid, and thenthe latter epoxidized fatty acid methyl ester into epoxy fatty acid methyl ester. The optimumreaction conditions with the epoxy value4.65%of the final products were determined: m(fattyacid methyl eater): m(30%hydrogen peroxide): m(88%formic acid): m(amino sulfonic acid)=1:0.45:0.7:0.01(mass ratio), reaction temperature65℃, reaction time8h. The structure ofFAME and EFAME were characterized by infrared spectra, and the final products compositionwas analyzed by gas chromatography.