Method for reducing biodiesel condensation point through ultraviolet light irradiation method

A technology of biodiesel and ultraviolet light, which is applied in the direction of biofuel, petroleum industry, fatty acid production, etc., can solve the problems of lowering the freezing point of biodiesel, high cost of freezing point, and high freezing point of biodiesel, so as to meet the needs of fluidity, Good pour point depressing effect and simple method

Active Publication Date: 2016-06-01
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of high freezing point of biodiesel and high cost of pour point depressing, the present invention irradiates biodiesel with ultraviolet light, changes the composition of biodiesel, and generates a small amount of dimers and oligomers. The existence of the two can effectively reduce the freezing point of biodiesel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] In the UV reaction vessel, add 100g of biodiesel (the main components are methyl oleate, methyl linoleate, etc.), and add 50g of anhydrous methanol as a solvent, and start UV light at room temperature, accompanied by magnetic stirring. After 3 hours of ultraviolet light irradiation, the methanol was removed by rotary evaporation, and the initial freezing point of biodiesel was 3°C. The sampling was measured by a freezing point instrument, and the freezing point of biodiesel after ultraviolet light irradiation was -4.8°C.

Embodiment 2

[0015] In the ultraviolet reaction vessel, add 100g of biodiesel (the main components are methyl oleate, methyl linoleate, etc.), and add 500g of anhydrous methanol as a solvent, and start ultraviolet light at room temperature, accompanied by magnetic stirring. After 3 hours of ultraviolet light irradiation, the methanol was removed by rotary evaporation. The initial freezing point of biodiesel was 3°C. The sampling was measured by a freezing point instrument, and the freezing point of biodiesel after ultraviolet light irradiation was -4.6°C.

Embodiment 3

[0017] Add 100g of biodiesel (the main components are methyl oleate, methyl linoleate, etc.) into the ultraviolet reaction vessel, and add 100g of cyclohexane as a solvent, and start ultraviolet light at room temperature, accompanied by magnetic stirring. After 1 hour of ultraviolet light irradiation, the cyclohexane was removed by rotary evaporation. The initial freezing point of biodiesel was 3°C. The sampling was measured by a freezing point instrument, and the freezing point of biodiesel after ultraviolet light irradiation was -4.4°C.

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Abstract

The invention discloses a method for reducing the biodiesel condensation point through an ultraviolet light irradiation method, and belongs to the field of new energy chemistry.The method includes the following steps that a certain amount of biodiesel is weighed and put into an ultraviolet light reactor, a magnetic stirring function is added in the ultraviolet light reactor, solvent is added to be mixed with the biodiesel, ultraviolet light irradiation coupled with stirring is started at the normal temperature, and a sufficient ultraviolet light irradiation reaction is conducted.After the reaction is completed, the solvent is evaporated and recovered, and the biodiesel condensation point can be reduced.The method is simple and easy to operate; the used solvent can be recovered and used, and waste is avoided; it is ensured that the reaction is environmentally friendly due to ultraviolet light irradiation; reaction cost is low, the condensation point reducing effect is good, the biodiesel condensation point can be reduced to minus 9.5 DEG C, and the requirement for biodiesel fluidity of general areas can be met.

Description

technical field [0001] The invention discloses a method for irradiating biodiesel with ultraviolet light to change the composition of the biodiesel so as to reduce its freezing point, and belongs to the field of new energy chemistry. Background technique [0002] Biodiesel is generally prepared from waste oil such as waste oil, and is a green and renewable new energy fuel. Its performance is not significantly different from that of petrochemical diesel. Biodiesel can be compounded with petrochemical diesel to make a mixed fuel for some diesel machinery and equipment. Biodiesel is generally composed of unsaturated fatty acid methyl ester and saturated fatty acid methyl ester. It is easy to solidify at low temperature, and it is not easy to flow when the engine is used, which brings many inconveniences in production. [0003] The freezing point of biodiesel is mostly around 0°C, and the freezing point of biodiesel prepared from peanut oil can be as high as 10°C. In different...

Claims

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Application Information

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IPC IPC(8): C11C3/00C10L1/02
CPCC10L1/02C11C3/00Y02E50/10
Inventor 宋国强吕小兵曹引梅丁淑敏冯筱晴
Owner CHANGZHOU UNIV
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