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Biodiesel composite antioxidant and biodiesel containing the same

A composite antioxidant and biodiesel technology, which is used in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problems of complex chemical structures of primary antioxidants and secondary antioxidants, high antioxidant additives, and increased use costs. , to achieve the effect of increasing oxidation stability, low price and prolonging service life

Inactive Publication Date: 2009-01-28
上海天之冠可再生能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application No. 03825109.4 describes the method of using 2,4-di-tert-butylhydroxytoluene (BHT) antioxidant to improve the storage stability of biodiesel, but the additive amount of antioxidant is higher, which increases the cost of use ; The patent application number is 200510137575.9 to increase the oxidation stability of biodiesel by compounding the main antioxidant and the secondary antioxidant, but the chemical structure of the main antioxidant and the secondary antioxidant is relatively complex, the synthesis cost is high, and the use is limited. limit

Method used

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  • Biodiesel composite antioxidant and biodiesel containing the same
  • Biodiesel composite antioxidant and biodiesel containing the same
  • Biodiesel composite antioxidant and biodiesel containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The oxidation induction time was 1.51h when no antioxidant was added to rapeseed oil biodiesel; the main antioxidant 2,6-di-tert-butylhydroquinone at a concentration of 100ppm and the auxiliary antioxidant at a concentration of 50ppm were added to rapeseed oil biodiesel The antioxidant β,β'-thiodipropionate dilaurate was stirred and dissolved at a temperature of 70° C. to obtain a clear and transparent biodiesel solution to be stabilized. According to the EU standard EN14112:2003 method, the induction time of the sample at a temperature of 110°C was determined to be 6.54h.

Embodiment 2

[0039] The primary antioxidant 2,6-di-tert-butylhydroquinone at a concentration of 80ppm and the secondary antioxidant β,β'-thiodipropionyl dilaurate at a concentration of 600ppm were added to rapeseed biodiesel , stirring and dissolving at a temperature of 80° C. to obtain a clear and transparent biodiesel solution to be stabilized. According to the EU standard EN14112:2003 method, the induction time of the sample at a temperature of 110°C was determined to be 6.86h.

Embodiment 3

[0041]The main antioxidant 2,5-di-tert-butylhydroquinone with a concentration of 200ppm and the auxiliary antioxidant tris-(2,4-di-tert-butylphenyl) with a concentration of 300ppm were added to rapeseed oil biodiesel The phosphite is stirred and dissolved at a temperature of 80° C. to obtain a clear and transparent biodiesel solution to be stabilized. According to the EU standard EN14112:2003 method, the induction time of the sample at a temperature of 110°C was determined to be 8.35h.

[0042] From the above examples, the oxidation stability of rapeseed oil biodiesel added with composite antioxidant is greatly improved compared with that of rapeseed oil biodiesel without antioxidant added.

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Abstract

The invention relates to a biodiesel antioxidant and a biodiesel containing the biodiesel antioxidant. The invention discloses a biodiesel compound antioxidant which contains a main antioxidant and an auxiliary antioxidant, the mole ratio between the main antioxidant and the auxiliary antioxidant is 1 to 100:1 to 12, wherein, the auxiliary antioxidant is a compound with the following molecular general formula (I) or a phosphorous acid ester compound or an arbitrary mixture thereof. The biodiesel compound antioxidant disclosed by the invention can obviously increase the oxidative stability of the biodiesel and greatly improve the mass quality of the biodiesel; furthermore, the antioxidant has low price and low addition amount, thus effectively prolonging the service life of the oil. Simultaneously, the added antioxidant has no obvious influence on other physicochemical properties of the biodiesel.

Description

technical field [0001] The invention relates to a biodiesel compound antioxidant and biodiesel containing the same. Background technique [0002] Biodiesel is a high-quality diesel substitute with outstanding environmental friendliness and renewability. The development of biodiesel industry is of great significance for ensuring oil security, protecting the ecological environment, promoting agricultural production and achieving sustainable development. . In recent years, breakthroughs have been made in the research of biodiesel, and a new renewable energy industry represented by biodiesel is booming at home and abroad. [0003] Biodiesel is fatty acid methyl ester produced from oily animal and vegetable oils, waste oils, engineering algae, etc., through transesterification with methanol. It is a renewable clean oxygenated liquid fuel. [0004] Because biodiesel generally contains more unsaturated fatty acid methyl esters, such as methyl oleate, methyl linoleate, methyl lino...

Claims

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Application Information

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IPC IPC(8): C10L1/10
Inventor 张龙史吉平张志杜风光金泽民刘钺
Owner 上海天之冠可再生能源有限公司
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