Method of preparing organism diesel oil from mixing plant oil
A technology of mixing plants and biodiesel, which is used in the preparation of liquid hydrocarbon mixtures, biological raw materials, biofuels, etc., can solve the problems of long reaction time, expensive enzymes, easy inactivation, etc., and achieves strong adaptability of raw materials, convenient switching, Yield-enhancing effect
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Embodiment 1
[0028] The crude vegetable oil containing 1.2% of unsaponifiable matter and the acid value of 72mgKOH / g is mixed with the rapeseed oil of Comparative Example 2 in a weight ratio of 0.3:1, and the mixed oil is continuously at a rate of 60 g / hour and an alcohol-oil molar ratio of 7. It is continuously supplied to the tubular reactor, the temperature in the reactor is 270-280°C, and the pressure is 8Mpa. After the crude reaction product is separated from methanol and glycerol, fatty acid methyl esters are distilled under reduced pressure and the yield of fatty acid methyl esters is 92.2wt%. , the acid value is 3.5mgKOH / g. The residual liquid at the bottom of the kettle can be recycled as a raw material to the feed port of the reactor for secondary reaction.
[0029] Under the same conditions, the crude vegetable oil with an acid value of 72 mgKOH / g was used as the raw material, the yield of fatty acid methyl ester was 87.2 wt%, and the acid value was 9.0 mgKOH / g.
Embodiment 2
[0031] The crude vegetable oil containing 1.5% unsaponifiable matter and the acid value of 52 mgKOH / g is mixed with the refined soybean oil in Comparative Example 1 at a weight ratio of 1:1, and the mixed oil is provided at a rate of 60 g / hour and an alcohol-to-oil molar ratio of 5. In the tubular reactor, the temperature in the reactor is 270-280 ℃, and the pressure is 8.5Mpa. After the crude product of the reaction is separated from methanol and glycerin, fatty acid methyl esters are distilled under vacuum rectification, and the yield of fatty acid methyl esters is 91±1wt%, The acid value is 3.3 mgKOH / g, and the residual liquid at the bottom of the kettle can be recycled as a raw material to the feed port of the reactor for secondary reaction.
[0032] Under the same conditions, the crude vegetable oil with an acid value of 52 mgKOH / g was used as the raw material, the yield of fatty acid methyl ester was 86 wt%, and the acid value was 7.2 mgKOH / g.
Embodiment 3
[0034] The crude vegetable oil with an acid value of 28.5mgKOH / g is mixed with soybean oil and rapeseed oil in a weight ratio of 1:1:1, and the mixed oil is continuously supplied to the pipe at a rate of 60 g / hour and a molar ratio of alcohol to oil of 5. In the reactor, fatty acid methyl ester was prepared under the conditions of reactor temperature of 320 ° C and pressure of 9 Mpa. The yield of fatty acid methyl ester was 83.9 wt%, and the acid value was less than 2.0 mgKOH / g. The feed port of the reactor is used for secondary reaction.
[0035] Under the same conditions, the crude vegetable oil with an acid value of 28.5 mgKOH / g was used as the raw material, the yield of fatty acid methyl ester was 84.2 wt%, and the acid value was 4.7 mgKOH / g.
[0036] Under the same conditions, soybean oil and rapeseed oil were used as raw materials, and the yields of fatty acid methyl esters were 69wt% and 76wt%, respectively.
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