Method for jointly producing biodiesel and lactic acid
A biodiesel and joint production technology, applied in the fields of biofuel, petroleum industry, fatty acid esterification, etc., can solve the problems of inability to achieve industrial production, complex production process, low yield, etc., to solve the problem of recycling and utilization, catalytic system Simple, low production cost effect
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Embodiment 1
[0020] Neutral jatropha oil was obtained by degumming jatropha oil with an acid value of 13.1 mg KOH / g, neutralizing with alkali, washing and cold filtering. Weigh 30g of jatropha oil, add methanol 8ml, anhydrous sodium silicate 0.9g, stir and react at 60°C and 200r / min for 60min, use gas chromatography (GC) external standard method to determine biodiesel product, fatty acid methyl ester yield was 96.5%.
[0021] Anhydrous sodium silicate was weighed and mixed with glycerin aqueous solution and placed in a rapid heating reaction kettle, wherein the dosage of anhydrous sodium silicate was 0.625 mol / L, and the concentration of glycerin was 0.27 mol / L. Heat to 300°C at a heating rate of 15°C / min, and react for 120 minutes to obtain lactate. Phosphoric acid is used to adjust the pH to 2.0 to obtain lactic acid, and the lactic acid product is determined by liquid chromatography external standard method, and the yield of lactic acid is 90.0%.
Embodiment 2
[0023] Weigh 30g of neutral jatropha oil, add methanol 8ml, anhydrous sodium silicate 0.9g, stir and react at 60°C and 200r / min for 60min, use gas chromatography (GC) external standard method to determine biodiesel product, fatty acid methyl ester The yield was 95.1%.
[0024] The recovered calcined sodium silicate was weighed and mixed with refined glycerin aqueous solution and placed in a rapid heating reaction kettle, wherein the dosage of anhydrous sodium silicate was 0.75 mol / L, and the concentration of glycerin was 0.27 mol / L. Heat to 300°C at a heating rate of 15°C / min, and react for 120 minutes to obtain lactate. Phosphoric acid was used to adjust the pH to 2.0, and the obtained lactic acid was determined by liquid chromatography external standard method, and the yield of lactic acid was 87.4%.
Embodiment 3
[0026] Weigh 30g of neutral jatropha oil, add methanol 8ml, anhydrous sodium silicate 0.9g, stir and react at 60°C and 200r / min for 60min, use gas chromatography (GC) external standard method to determine biodiesel product, fatty acid methyl ester The yield was 97.2%.
[0027] Weigh the recovered sodium silicate and mix it with the by-product aqueous glycerin solution from methanol removal and put it in a rapid heating reaction kettle. The dosage of calcined sodium silicate is 0.75mol / L, and the concentration of glycerin is 0.27mol / L. Heat to 300°C at a heating rate of 15°C / min, and react for 120 minutes to obtain lactate. Phosphoric acid was used to adjust the pH to 2.0, and the obtained lactic acid was determined by liquid chromatography external standard method to determine the lactic acid product, and the yield of lactic acid was 85.7%.
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