Method for preparing biodiesel through inducing eutectic system on site

A biodiesel and eutectic technology, applied in biofuel, petroleum industry, liquid carbon-containing fuel, etc., can solve the problems of strong corrosiveness of the catalyst, difficult separation and recovery, and easy saponification of the product, so as to achieve easy recycling and low cost The effect of low cost and simplified process

Inactive Publication Date: 2015-01-14
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Synthetic biodiesel is a transesterification reaction that can be catalyzed by both acids and bases. Strong acids (sulfuric acid) or strong bases (KOH and NaOH) are usually used as catalysts. The catalysts are highly corrosive and difficult to separate and recover after the reaction, or the products are easy to saponify, resulting in Disadvantages such as a large amount of waste water and waste alkali (acid) liquid discharge are likely to cause secondary pollution to the environment

Method used

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  • Method for preparing biodiesel through inducing eutectic system on site
  • Method for preparing biodiesel through inducing eutectic system on site

Examples

Experimental program
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Effect test

Embodiment 1

[0019] In a 100mL three-neck round bottom flask, add 30g (0.034mol) soybean oil (average molecular weight 878.25) and preheat it in a water bath at 65°C, then add 0.3g (0.0075mol) NaOH, 6g methanol (0.1875mol), 0.6g chlorine Choline, stirred and refluxed for 4.0 hours at normal pressure in a water bath at 65°C, cooled to room temperature, transferred to a separatory funnel for liquid-liquid phase separation, the upper layer was the product, washed with hot water for 3 to 5 times, Vacuum drying at 400 Pa and 80°C yielded 25.7 g of pure product with a yield of about 85%. The unreacted raw material, catalyst, and eutectic mixture in the lower layer can be directly used in the next batch of reactions without treatment.

Embodiment 2

[0021] In a 100mL three-necked round-bottomed flask, add 30g (0.034mol) soybean oil (average molecular weight 878.25) and preheat it in a water bath at 65°C, then add 0.15g of NaOH, 10.9g of methanol (0.34mol), and 3.0g of choline chloride Alkali, stirred and refluxed in a water bath at 65°C under normal pressure for 2.0 hours, cooled to room temperature, transferred to a separatory funnel for liquid-liquid phase separation, and the upper layer was the product. After washing with hot water for 3 to 5 times, Vacuum drying at 80°C gave 26.0 g of the pure product, with a yield of about 86%; the unreacted raw material, catalyst, and eutectic mixture in the lower layer could be directly used in the next batch of reactions without treatment.

Embodiment 3

[0023] In a 100mL three-neck round bottom flask, add 30g of soybean oil (average molecular weight 878.25) and preheat it in a water bath at 65°C, then add 1.5g of NaOH, 8g of methanol, and 1.0g of choline chloride. Stir and reflux for 3.0 hours, cool to room temperature, transfer to a separatory funnel for liquid-liquid phase separation, and the upper layer is the product. After washing with hot water for 3 to 5 times, vacuum dry at 400Pa and 80°C to obtain the pure product 26.6 g, the yield is about 88%; the mixture of unreacted raw materials, catalysts and eutectic systems in the lower layer can be directly used in the next batch of reactions without treatment.

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Abstract

The invention discloses a method for preparing biodiesel through inducing a eutectic system on site. The method comprises the steps of stirring and heating vegetable oil and methanol under normal pressure to obtain biodiesel. The method disclosed by the invention has the advantages that firstly, choline chloride serves as an inductive agent of the eutectic system, so that the emulsion phenomenon is eliminated and the process flow is simplified; secondly, the reaction condition is mild and the reaction can be carried out under normal pressure and under the condition of methanol backflow temperature; thirdly, a sodium hydroxide catalyst is adopted and the catalyst is low in cost, high in activity and little in consumption; fourthly, the product is high in purity and little in impurity; fifthly, the eutectic system and the product are easily separated after the reaction is completed, so that the system is easily recycled and the method is friendly to the environment.

Description

a technical field [0001] The invention relates to a method for preparing biodiesel in a deep eutectic system, and belongs to the technical field of chemical material preparation. This method is suitable for the occasion of synthesizing biodiesel with vegetable oil and methanol as raw materials. Two background technology [0002] As a new type of renewable and clean energy, biodiesel is a liquid fuel made from oil crops, oil palm and pistachio and other oil forest fruits, engineering microalgae and other oil aquatic plants, animal fats, and waste cooking oil. It is a high-quality petroleum diesel substitute. Biodiesel is a typical "green energy". Vigorously developing biodiesel has important strategic significance for sustainable economic development, promoting energy substitution, reducing environmental pressure, and controlling urban air pollution. [0003] Synthetic biodiesel is a transesterification reaction that can be catalyzed by both acids and bases. Strong acids (s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/10C10L1/02
CPCY02E50/10
Inventor 方东姜晨宁王京平王彦卿戴兢陶
Owner CHANGZHOU UNIV
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