Method for preparing biodiesel through esterification reaction of ultrasonic-assisted soybean oil deodorization distillate
A technology for deodorizing distillate and biodiesel, which is applied in the fields of biofuel, fatty acid esterification, fat oil/fat refining, etc., can solve the problems of large energy consumption and catalyst consumption in the production process and high cost of biodiesel raw materials, so as to increase the market Competitive, low energy consumption, high yield effects
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Embodiment 1
[0022] Take 1Kg of soybean oil deodorization distillate, put it in a 2L reactor, add 925mL of anhydrous methanol, 10mL of 98% concentrated sulfuric acid, stir the feed while heating, keep the temperature at 60°C for 120 min, and put the reaction solution Place it in a liquid separator, let it stand for stratification, discard the lower layer, and wash the upper layer with deionized water at a ratio of 1:1 for several times until the washing water is neutral. The soybean oil deodorization distillate after acid-catalyzed methyl esterification is then Remove the phytosterols in it by gradually cooling down. The cooling steps are 15°C, 5°C, and -5°C. Store at each temperature for 2 hours. After each cooling, centrifuge at 5000 r / min for 15 minutes to remove the phytosterols. %Add anhydrous sodium sulfate for dehydration for 2h, pre-esterified soybean oil deodorization distillate 850g. Place the deodorized distillate of pre-esterified soybean oil in a dual-frequency pulsed ultrason...
Embodiment 2
[0024] Take 2Kg of soybean oil deodorization distillate, put it in a 4L reactor, add 1850 mL of anhydrous methanol, 20 mL of 98% concentrated sulfuric acid, stir the feed while heating, keep the temperature at 60 ° C for 120 min, and then put the reaction The solution was placed in a liquid separator, allowed to stand for stratification, and the lower layer was discarded, and the upper layer was washed with deionized water at a ratio of 1:1 for several times until the washing water was neutral, and the deodorized distillate of soybean oil after acid-catalyzed methyl esterification, Then, the phytosterols were removed by gradually lowering the temperature. The cooling steps were 15°C, 5°C, and -5°C. Each temperature was stored for 2 hours. After each cooling, the phytosterols were removed by centrifugation at 5000 r / min for 15 minutes. 25% was added to anhydrous sodium sulfate for dehydration for 2 hours, and the deodorized distillate of pre-esterified soybean oil was 1700g. Pl...
Embodiment 3
[0026]Take 2Kg of soybean oil deodorization distillate, put it in a 4L reactor, add 1850 mL of anhydrous methanol, 20 mL of 98% concentrated sulfuric acid, stir the feed while heating, keep the temperature at 60 ° C for 120 min, and then put the reaction The solution was placed in a liquid separator, allowed to stand for stratification, and the lower layer was discarded, and the upper layer was washed with deionized water at a ratio of 1:1 for several times until the washing water was neutral, and the deodorized distillate of soybean oil after acid-catalyzed methyl esterification, Then, the phytosterols were removed by gradually lowering the temperature. The cooling steps were 15°C, 5°C, and -5°C. Each temperature was stored for 2 hours. After each cooling, the phytosterols were removed by centrifugation at 5000 r / min for 15 minutes. 25% was added to anhydrous sodium sulfate for dehydration for 2 hours, and the deodorized distillate of pre-esterified soybean oil was 1700g. Pla...
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