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Method for improving oxidation stability of biodiesel

An oxidative stability and biodiesel technology, used in biofuels, petroleum industry, liquid carbon-containing fuels, etc., can solve problems such as poor antioxidant performance, and achieve good antioxidant performance, good compatibility, and good stability.

Inactive Publication Date: 2012-09-05
江苏永林油脂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the shortcomings of the poor oxidation resistance of biodiesel, and propose an antioxidant that not only improves the use performance but also improves the oxidation stability, so as to meet the necessary conditions for the use of biodiesel instead of petrochemical diesel.

Method used

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  • Method for improving oxidation stability of biodiesel
  • Method for improving oxidation stability of biodiesel

Examples

Experimental program
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Effect test

example 1

[0012] Example 1 Put 500 g of biodiesel with an oxidation stability of 6.60 hours and a freezing point of 14.3° C. into a compounding kettle, heat it to 20° C. (because the room temperature is 5° C., the biodiesel is in a crystalline state), and add methyl isostearate 2.5g, kept at a constant temperature of 20°C, stirred for 0.53h, and discharged to obtain 502.5g of compound diesel oil with good oxidation stability. The oxidation stability of the compound biodiesel was tested to be 6.82h.

example 2

[0013] Example 2 Put 1000g of biodiesel with an oxidation stability of 5.25h and a freezing point of 3.5°C into a compounding kettle, add 20.0g of methyl isostearate, stir for 0.5h at normal temperature and pressure, and discharge to obtain 1020.0g of oxidation stability Good compound biodiesel. The oxidation stability of the compound diesel oil was tested to be 6.08h.

example 3

[0014] Example 3 Put 1,000 g of biodiesel with an oxidation stability of 7.75 hours and a freezing point of 19.7°C into a compounding kettle, heat it to 25°C (because the room temperature is 10°C, the biodiesel is in a crystallized state), and add methyl isostearate 10.0g, stirred at a constant temperature of 25°C for 0.51h, and discharged to obtain 1010.0g of compound diesel oil with good oxidation stability. The oxidation stability of the compound biodiesel was tested to be 8.26h.

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Abstract

The invention relates to a method for improving the oxidation stability of biodiesel, belonging to the technical field of fine chemical engineering. The complex biodiesel having high oxidation stability is obtained by adding methyl isostearate to the biodiesel by a certain ratio and evenly stirring. By adding methyl isostearate as antioxidant to the biodiesel, the method of the invention can improve both the stability and low-temperature fluidity of the biodiesel, ensure the biocompatibility with the biodiesel and further improve the lubricating property of an engine; and the complex formulation process is simple and safe.

Description

technical field [0001] This technology proposes the invention of adding methyl isostearate to improve the oxidation stability of biodiesel, which belongs to the technical field of fine chemicals. Background technique [0002] As an alternative fuel or additive to diesel, biodiesel should meet the requirements for the use of diesel in order to ensure its performance as a fuel. To evaluate whether biodiesel can be used as a substitute fuel for mineral diesel, it is of great significance to examine the anti-oxidation performance of biodiesel, that is, the oxidation stability. The indicator of oxidation stability is tested in the national standard of biodiesel (BD100) according to the provisions of EN14112, the stabilization time of biodiesel heated to 110°C. Reaching the standard of oxidation stability is a necessary condition for the applicability of biodiesel as a fuel. The purpose of improving oxidation stability can be achieved by adjusting the components of biodiesel, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/19C10L1/02C10L10/00
CPCY02E50/13Y02E50/10
Inventor 徐永林殷小平
Owner 江苏永林油脂科技有限公司