Method for preparing biodiesel by lowering value of high acid palm oil
一种生物柴油、棕榈油的技术,应用在生物原料、生物燃料、石油工业等方向,能够解决反应器腐蚀严重、树脂价格昂贵、产品不易获得等问题,达到无设备腐蚀、易分离、降低酸值的效果
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Embodiment 1
[0014] Palm oil and methanol with an acid value of 181.7mgKOH / g are added to the three-necked flask with a molar ratio of 1:6, and the solid superacid SO with an oil weight of 5wt% is added. 4 2- / ZrO 2 Catalyst, control the reaction temperature at 60-62°C, stir and reflux with a heat-collecting magnetic stirrer for 4 hours, centrifuge the catalyst, leave the crude product to stand and separate, take the methyl ester layer and measure its acid value to 6.5mgKOH / g, the ester The transformation rate is 96.4%.
[0015] Add the methyl ester phase and methanol with an acid value of 6.5mgKOH / g into the three-necked flask at a molar ratio of 1:6, and add solid superacid SO with an oil weight of 5wt%. 4 2- / ZrO 2 Catalyst, control the reaction temperature at 60-62°C, stir and reflux reaction with a heat-collecting magnetic stirrer for 4 hours, centrifuge the catalyst, leave the crude product to stand and separate, take the methyl ester layer and measure its acid value to 0.7mgKOH / ...
Embodiment 2
[0017] Palm oil and methyl alcohol with an acid value of 181.7mgKOH / g are added to the three-necked flask with a molar ratio of 1:9, and the solid superacid SO with an oil weight of 3wt% is added. 4 2- / ZrO 2 Catalyst, control the reaction temperature at 68-69°C, stir and reflux with a heat-collecting magnetic stirrer for 2 hours, centrifuge the catalyst, leave the crude product to stand and separate, take the methyl ester layer and measure its acid value to 3.2mgKOH / g, the ester The transformation rate is 98.2%.
[0018] Add the methyl ester phase and methanol with an acid value of 3.2mgKOH / g into the three-necked flask with a molar ratio of 1:9, and add solid superacid SO with an oil weight of 5wt%. 4 2- / ZrO 2 Catalyst, control the reaction temperature at 68-69°C, stir and reflux with a heat-collecting magnetic stirrer for 2 hours, centrifuge the catalyst, leave the crude product to stand and separate, take the methyl ester layer and measure its acid value to 0.3mgKOH / g...
Embodiment 3
[0020] Palm oil and methanol with an acid value of 181.7mgKOH / g are added to the three-necked flask with a molar ratio of 1:6, and the solid superacid SO with an oil weight of 5wt% is added. 4 2- / TiO 2 Catalyst, control the reaction temperature at 62-63°C, stir and reflux reaction with a heat-collecting magnetic stirrer for 6h, centrifuge the catalyst, leave the crude product to stand and separate, take the methyl ester layer and measure its acid value to 14.4mgKOH / g, the ester The conversion rate was 92.0%.
[0021] Add the methyl ester phase and methanol with an acid value of 14.4mgKOH / g into the three-necked flask at a molar ratio of 1:6, and add solid superacid SO with an oil weight of 5wt%. 4 2- / ZrO 2 Catalyst, control the reaction temperature at 62-63°C, stir and reflux reaction with a heat-collecting magnetic stirrer for 6h, centrifuge the catalyst, leave the crude product to stand and separate, take the methyl ester layer and measure its acid value to 0.7mgKOH / g,...
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