Method for preparing biodiesel from Xanthium strumarium

A technology of biodiesel and cocklebur oil, which is applied in the chemical industry and can solve the problems that cocklebur biodiesel methods have not been reported yet.

Inactive Publication Date: 2013-06-05
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the method for preparing cocklebur biodie

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for preparing biodiesel from cocklebur, comprising the following steps:

[0018] (1) Crush cocklebur to about 200 meshes, soak in petroleum ether repeatedly until the extract is light yellow, and carry out vacuum distillation at 80°C and 0.08MPa to obtain cocklebur oil;

[0019] (2) Put 5g cocklebur oil and 1.87g methanol into a 50mL round-bottomed flask. The catalyst is 0.04g KOH and stir at 65°C for 1h. After the reaction, add 30mL petroleum ether and let it stand for 10min. The system is separated and the lower layer is discarded. , wash the upper solution with water to neutrality, carry out vacuum distillation and filtration at 80°C and 0.08MPa to obtain biodiesel.

[0020] The obtained biodiesel is measured, and its fatty acid methyl ester is 98.3%, and other results are shown in the following table:

[0021] Cocklebur biodiesel testing project Test based on Test results Moisture content, % (mass fraction) SH / T 0246-1992(2004) 0.049 ...

Embodiment 2

[0023] A method for preparing biodiesel from cocklebur, comprising the following steps:

[0024] (1) Crush cocklebur to about 200 meshes, soak in petroleum ether repeatedly until the extract is light yellow, and carry out vacuum distillation at 90°C and 0.07MPa to obtain cocklebur oil;

[0025] (2) Put 5 g cocklebur oil and 2.68 g ethanol into a 50 mL round-bottomed flask. The catalyst is 0.04 g KOH and stir at 65 °C for 1 h. After the reaction, add 30 mL petroleum ether and let it stand for 10 min. The system is separated and discarded. For the lower layer, wash the upper layer solution with water to neutrality, carry out vacuum distillation and filtration at 90°C and 0.07MPa to obtain biodiesel. The obtained product is measured, and its fatty acid ethyl ester is 97.7%.

Embodiment 3

[0027] A method for preparing biodiesel from cocklebur, comprising the following steps:

[0028] (1) Crush cocklebur to about 200 meshes, soak in petroleum ether repeatedly until the extract is light yellow, and carry out vacuum distillation at 80°C and 0.075MPa to obtain cocklebur oil;

[0029] (2) Put 200g cocklebur oil and 74.8g methanol into a 500mL round-bottomed flask. The catalyst is 1.6g KOH and stir at 65°C for 1h. After the reaction, add 100mL petroleum ether and let it stand for 10min. The system is separated and the lower layer is discarded. , wash the upper solution with water to neutrality, carry out vacuum distillation and filtration at 80°C and 0.075MPa to obtain biodiesel. The obtained product is measured, and its fatty acid methyl ester is 96.9%.

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PUM

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Abstract

The invention discloses a method for preparing biodiesel from Xanthium strumarium, which comprises the following steps: pulverizing Xanthium strumarium to 200 meshes or so, repeatedly soaking in petroleum ether until the extracting solution is light yellow, and carrying out vacuum distillation at 60-90 DEG C under the pressure of 0.07-0.08 MPa to obtain Xanthium strumarium oil; reacting methanol and the Xanthium strumarium oil in a mol ratio of (5-12):1 at 55-70 DEG C for 0.5-2 hours, wherein the amount of a catalyst potassium hydroxide is 0.5-1 wt% of the oil; and after the reaction finishes, adding petroleum ether according to the oil/petroleum ether mol ratio of (1-3):1, standing for stratification for 10 minutes, removing the understratum, washing the solution with water to a neutral state, and carrying out vacuum distillation at 60-90 DEG C under the pressure of 0.07-0.08 MPa to obtain the Xanthium strumarium oil biodiesel. The product obtained by the method disclosed by the invention conforms to the National Biodiesel DB100 Standard, and has the advantages of low pollution, wide raw material sources, low cost, simple technique and high economic benefit.

Description

technical field [0001] The invention relates to the technical field of chemical engineering, in particular to a method for preparing biodiesel from cocklebur. [0002] Background technique [0003] With the continuous development of society, the demand for energy is also increasing, especially the petrochemical diesel oil is facing the increasingly depleted situation and the ensuing environmental pollution problems are also getting worse. These severe problems are a huge threat to human survival and development. The development of a sustainable and environmentally friendly biodiesel to replace petrochemical diesel has become a hot spot in human research today. [0004] Biodiesel (Biodiesel) refers to the renewable diesel fuel that can replace petrochemical diesel oil, which is made from oil crops, wild oil plants, engineering microalgae and other aquatic vegetable oils, animal oils, and catering waste oils through transesterification process. Refers to solid, liquid or gas...

Claims

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Application Information

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IPC IPC(8): C11C3/10C10L1/02C11B1/00C11B1/04
CPCY02E50/13Y02E50/10
Inventor 杨松常飞薛伟胡德禹李虎周全张德静秦文婷刘晓芳
Owner GUIZHOU UNIV
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