Production process of super-clean biodiesel with metal ion content less than 2PPM
A technology of metal ions and biodiesel, applied in the fields of biofuel, petroleum industry, fatty acid production, etc., can solve the problem of difficult and efficient removal of metal ions and non-metal ions in biodiesel, and achieve the effect of efficient removal
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Embodiment 1
[0046] The present embodiment proposes a production process of ultra-clean biodiesel with a metal ion content less than 2PPM, comprising the following steps:
[0047] S1, adding clay and activated carbon to the crude first fat and stirring, then centrifuged to obtain the first oil; the addition of the clay is 3.5% of the quality of the crude oil; the addition of the activated carbon is 3% of the quality of the crude oil 0.3%; wherein, the crude methyl ester is obtained by esterification of crude oil and methanol;
[0048] S2. Adding water to the first grease to wash to obtain a second grease; the amount of water added is 15% of the mass of the first grease;
[0049] S3. Distilling the second grease for the first time at 205°C and a vacuum residual pressure of 5000Pa to obtain a third grease;
[0050] S4. Distilling the third grease for a second time at 225° C. and a vacuum residual pressure of 900 Pa to obtain biodiesel.
Embodiment 2
[0052] The present embodiment proposes a production process of ultra-clean biodiesel with a metal ion content less than 2PPM, comprising the following steps:
[0053] S1, adding clay and activated carbon to the crude methyl fat and stirring, then centrifuged to obtain the first oil; the addition of the clay is 4% of the quality of the crude oil; the amount of the activated carbon is 4% of the quality of the crude oil 0.25%; wherein, the crude methyl ester is obtained by esterification of crude oil and methanol;
[0054] S2. Adding water to the first grease for washing to obtain a second grease; the amount of water added is 14% of the mass of the first grease;
[0055] S3. Distilling the second grease for the first time at 200°C and a vacuum residual pressure of 4900Pa to obtain a third grease;
[0056] S4. Distilling the third grease for a second time at 220° C. and a vacuum residual pressure of 900 Pa to obtain biodiesel.
Embodiment 3
[0058] The present embodiment proposes a production process of ultra-clean biodiesel with a metal ion content less than 2PPM, comprising the following steps:
[0059] S1, adding clay and activated carbon to the crude methyl fat and stirring, then centrifuged to obtain the first oil; the addition of the clay is 3% of the quality of the crude oil; the amount of the activated carbon is 3% of the quality of the crude oil 0.2%; wherein, the crude methyl ester is obtained by esterification of crude oil and methanol;
[0060] S2. Adding water to the first grease for washing to obtain a second grease; the amount of water added is 10% of the mass of the first grease;
[0061] S3. Distilling the second grease for the first time at 200°C and a vacuum residual pressure of 4500Pa to obtain a third grease;
[0062]S4. Distilling the third grease for a second time at 220° C. and a vacuum residual pressure of 800 Pa to obtain biodiesel.
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