Method for reducing freezing point of biodiesel

A technology of biodiesel and freezing point, which is applied in the fields of biofuel, petroleum industry, liquid carbon-containing fuel, etc., can solve the problems of poor applicability of biodiesel, and achieve the effect of simple blending process, good oxidation resistance and good stability

Inactive Publication Date: 2010-06-30
江苏永林油脂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to propose a method for depressing the point of view of biodiesel with regard to the shortcoming of poor applicability of biodiesel with high freezing point

Method used

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  • Method for reducing freezing point of biodiesel
  • Method for reducing freezing point of biodiesel

Examples

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Comparison scheme
Effect test

example 1

[0013] Example 1 Put 500 g of biodiesel with a freezing point of 15.8° C. into a compounding kettle, heat the biodiesel to 22° C. (because the room temperature is lower than 15.8° C., the biodiesel is in a crystallized state), add methyl isostearate 2.5g, constant temperature 22°C, stirring time greater than or equal to 0.5h, and discharged to obtain 502.5g low freezing point compound diesel oil. It has been tested that the freezing point of the compound diesel oil is 8.6°C.

example 2

[0014] Example 2 Put 1000g of biodiesel with a freezing point of 3.5°C into a compounding kettle, add 5.0g of methyl isostearate, stir for 0.5h at normal temperature and pressure, and discharge to obtain 1005.0g of compounded diesel with a low freezing point. It has been tested that the freezing point of the compound diesel is -1.9°C.

example 3

[0015] Example 3 Put 1000 g of biodiesel with a freezing point of 20.5° C. into a compounding kettle, heat it to 26° C. (when the room temperature is lower than 26.0° C., the biodiesel is in a crystallized state), add 10.0 g of methyl isostearate, and keep the temperature at 26° C. Stir at ℃ for 0.5h, and discharge to obtain 1010.0g of compound diesel oil with low freezing point. It has been tested that the freezing point of the compound diesel oil is 10.9°C.

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Abstract

The invention relates to a method for reducing the freezing point of biodiesel, which belongs to the technical field of fine chemical industry. In the method, mixture of branched methyl-based methyl stearate without any double bond is added in biodiesel according to a specific proportion, the methyl can be in various positions, and the biodiesel with a low freezing point can be obtained after complete mixing. The addition of methyl isostearate into the biodiesel enhances the stability and oxidation resistance of the biodiesel, and also improves the engine lubricating property. Moreover, the compounding process is simple and safe.

Description

technical field [0001] This technology proposes the invention of adding methyl isostearate to lower the freezing point of biodiesel, which belongs to the technical field of fine chemicals. Background technique [0002] As an alternative fuel or additive to petrochemical 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 low-temperature fluidity, that is, the freezing point. Low-temperature fluidity is a necessary condition for use as a fuel. The purpose of point depressing can be achieved by adjusting the components of biodiesel, that is, increasing the unsaturated components in biodiesel and increasing the iodine value to lower the freezing point, but too high iodine value will lead to poor oxidation stability of biodiesel and poor combustion. completely, affecting the suitability for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/19C10L10/14C10L1/02C10L10/08
CPCY02E50/13Y02E50/10
Inventor 徐永林殷小平
Owner 江苏永林油脂科技有限公司
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