Esterification method for preparing biodiesel using waste oils and fats
A technology of waste oil and biodiesel, which is applied in fatty acid esterification, biofuel, petroleum industry, etc., to achieve the effects of shortened reaction time, low corrosion, and wide range of acid values of raw materials
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[0017] Example 1
[0018] Such as figure 1 As shown, 14 tons of waste oil with an acid value of 120mgKOH / g after removing impurities and water is added to the raw oil storage tank 8, and the waste oil is pumped through the raw oil heat exchanger 7 into the raw oil heater 6 for heating by an oil pump. The waste oil heated to 100°C is added to the stainless steel reactor 5 from the raw oil inlet on the top of the stainless steel reactor 5, and 52kg of esterification catalyst is added to the stainless steel reactor 5 from the catalyst inlet on the top of the stainless steel reactor 5. The esterification catalyst is a mixture of methyl sulfonic acid and phosphoric acid with a mass ratio of 1:0.1. The refined methanol enters the methanol heater 3 through the methanol heat exchanger 1 for heating and gasification. The gasification methanol is 0.7m 3 / h flow rate flows from the gas-phase methanol tube 9 in the bottom of the stainless steel reactor 5 into the stainless steel reactor 5. T...
Example Embodiment
[0021] Example 2
[0022] Such as figure 1 As shown, 14 tons of waste oil with an acid value of 120mgKOH / g after removing impurities and water is added to the raw oil storage tank 8, and the waste oil is pumped through the raw oil heat exchanger 7 into the raw oil heater 6 for heating by an oil pump. The waste oil heated to 110°C is fed into the stainless steel reactor 5 from the raw oil inlet on the top of the stainless steel reactor 5, and 52kg of esterification catalyst is fed into the stainless steel reactor 5 from the catalyst inlet on the top of the stainless steel reactor 5. The esterification catalyst is a mixture of methyl sulfonic acid and phosphoric acid with a mass ratio of 1:0.05. The refined methanol enters the methanol heater 3 through the methanol heat exchanger 1 for heating and gasification. The gasification methanol is 0.8m 3 / h flow rate flows from the gas-phase methanol tube 9 in the bottom of the stainless steel reactor 5 into the stainless steel reactor 5. ...
Example Embodiment
[0023] Example 3
[0024] In Example 1, the esterification catalyst used was a mixture of equal mass of ethyl sulfonic acid and polyether acid phosphate in a mass ratio of 1:0.01. The other steps were the same as in Example 1, and the acid value was less than 1 mgKOH / g. The yield of the methyl ester is 95%.
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