A method for synthesizing biodiesel in eutectic system induced in situ

A technology for synthesizing biology and biodiesel, which is applied in the fields of biofuel, petroleum industry, liquid carbon-containing fuel, etc., can solve the problems of strong corrosiveness of the catalyst, difficult separation and recovery, secondary pollution of the environment, etc., and achieve simplified production process, durable The effect of high acceptance and simple equipment

Inactive Publication Date: 2019-08-23
YANCHENG TEACHERS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Both transesterification and esterification are common reactions for synthesizing biodiesel. Transesterification usually uses strong acid (sulfuric acid) or strong base (KOH and NaOH) as a catalyst. The catalyst is highly corrosive and difficult to separate and recover after the reaction, or The product is easy to saponify, producing a large amount of waste water, and the discharge of waste alkali (acid) liquid is easy to cause secondary pollution to the environment, etc.

Method used

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  • A method for synthesizing biodiesel in eutectic system induced in situ
  • A method for synthesizing biodiesel in eutectic system induced in situ

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 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 induction Reagent (N-sulfonic acid propyl group-N,N,N-trihydroxyethylammonium), stirred and refluxed for 4.0 hours in a 65°C water bath at normal pressure, cooled to room temperature, transferred to a separatory funnel for liquid-liquid Phase separation, the upper layer is the product, after washing with hot water for 3 to 5 times, vacuum drying at 400 Pa and 80 ° C to obtain 26.5 g of pure product, the yield is about 88%; the lower layer is unreacted raw materials, catalysts, eutectic system The mixture can be directly used in the next batch of reactions without further treatment.

Embodiment 2

[0032] 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, 8.72g of methanol (0.272mol), and 3.0g of inducer, Under normal pressure, stir and reflux in a water bath at 65°C for 2.0 hours, cool to room temperature, transfer to a separatory funnel for liquid-liquid phase separation, and the upper layer is the product. Under vacuum drying, 27.0 g of pure product was obtained, and the yield was about 89%. The mixture of unreacted raw materials, catalyst and eutectic system in the lower layer could be directly used in the next batch of reaction without treatment.

Embodiment 3

[0034] In a 100mL three-neck round bottom flask, add 30g soybean oil (average molecular weight 878.25) and preheat it in a water bath at 65°C, then add 1.5g NaOH, 8g methanol, and 1.0g inducer, and stir under normal pressure and a water bath at 65°C Reflux for 3.0 hours, cool to room temperature, and transfer to a separatory funnel for liquid-liquid phase separation. The upper layer is the product. After washing with hot water for 3 to 5 times, vacuum-dry at 400 Pa and 80°C to obtain 27.5 g of pure product. The yield is about 91%; the mixture of unreacted raw materials, catalyst and eutectic system in the lower layer can be directly used in the next batch of reaction without treatment.

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Abstract

The invention discloses a method for synthesizing biodiesel in a field-induced low eutectic system. The raw materials are vegetable oil and methyl alcohol, stirring and heating are conducted at normal pressure, and the biodiesel is obtained. The method for synthesizing the biodiesel in the field-induced low eutectic system has the advantages that N-sulfonic acid propyl trihydroxyethyl ammonium serves as an inducer of the low eutectic system, an emulsion phenomenon is eliminated, and the technological process is simplified; the system does not contain a halide ion, and damage to metal equipment is avoided; a sodium hydroxide catalyst is adopted, the cost is low, the activity is high, and the dosage is low; the reaction condition is mild, and a reaction can be conducted under the condition of normal pressure and methyl alcohol reflux temperature; the product purity is high, and impurities are few; after the reaction is completed, a low eutectic catalytic system is prone to be separated from a product, recycling is easy, and the method is environmentally friendly.

Description

[0001] A technical field [0002] The invention relates to a method for synthesizing biodiesel in a deep eutectic system induced on site, 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. [0003] Two background technology [0004] The shortage of energy supply worldwide and the increasing environmental pollution force people to look for alternatives to petroleum. 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 pre...

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 方东彭欢陈社云武力左戴兢陶孙思宇黄雄郁闯
Owner YANCHENG TEACHERS UNIV
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