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Method for preparing fatty acid methyl ester by using mixed fatty acid

A technology of fatty acid methyl ester and mixed fatty acid, applied in the field of preparation of fatty acid methyl ester, can solve the problems of limitation and high cost of raw materials, and achieve the effects of low cost, improved utilization rate and simple post-processing

Inactive Publication Date: 2008-05-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of these methods use vegetable oil and animal fat as raw materials, so the cost of raw materials is relatively high and limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: the preparation of thick fatty acid methyl ester: mixed fatty acid and methyl alcohol are placed in reactor by the mass ratio of 100:30, mix; And add the p-toluenesulfonic acid of fatty acid quality 0.8% in reactor, at 80 ℃ for reaction, after the reaction is finished, remove the moisture; the preparation of refined fatty acid methyl ester: get crude fatty acid methyl ester and methyl alcohol and put in the reactor by the mass ratio of 100:30, and add fatty acid quality 0.5% in the reactor For p-toluenesulfonic acid, react at 80°C; after the reaction is over, distill off the methanol in the solution under reduced pressure to obtain refined fatty acid methyl ester.

Embodiment 2

[0010] Embodiment 2: the preparation of thick fatty acid methyl ester: mixed fatty acid and methyl alcohol are placed in reactor by the mass ratio of 100:25, mix; And add the p-toluenesulfonic acid of fatty acid quality 1.2% in reactor, at 83 ℃ for reaction, after the reaction is finished, remove moisture; the preparation of refined fatty acid methyl ester: get crude fatty acid methyl ester and methyl alcohol to be placed in the reactor by the mass ratio of 100:20, and add fatty acid quality 1.3% in the reactor For p-toluenesulfonic acid, react at 83°C; after the reaction is over, distill off the methanol in the solution under reduced pressure to obtain refined fatty acid methyl ester.

Embodiment 3

[0011] Embodiment 3: the preparation of crude fatty acid methyl ester: mixed fatty acid and methyl alcohol are placed in reactor by the mass ratio of 100:15, mix; And add the p-toluenesulfonic acid of fatty acid quality 0.5% in reactor, at 78 ℃ for reaction, after the reaction is finished, remove moisture; the preparation of refined fatty acid methyl ester: get crude fatty acid methyl ester and methyl alcohol and place in reactor by the mass ratio of 100:18, and add fatty acid quality 0.7% in the reactor For p-toluenesulfonic acid, react at 78°C; after the reaction is over, distill under reduced pressure to remove methanol in the solution to obtain refined fatty acid methyl ester.

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PUM

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Abstract

The invention relates to a method for using mixed fatty acid to prepare fatty acid methyl ester, which comprises that arranges and mixes uniformly mixed fatty acid and methanol in a reactor, adds tosylic acid into the reactor to react, removes water to obtain crude fatty acid methyl ester after the reaction, arranges the crude fatty acid methyl ester and methanol in the reactor, adds tosylic acid into the reactor, depressurizes and distills to remove methanol in the solution after the reaction to obtain refine fatty acid methyl ester. Compared with prior art, the invention has low cost, high product conversion rate, simple post-treatment, and little pollution, with significant economic and practical benefits.

Description

technical field [0001] The invention relates to a method for preparing fatty acid methyl ester (ie, biodiesel), in particular to a method for preparing fatty acid methyl ester by using mixed fatty acids. Background technique [0002] Today, with the world's industrial development, the demand for diesel oil is increasing day by day, which will have a direct impact on the environment and energy. It is urgent to start looking for an environmentally friendly and renewable energy source. In recent years, people have begun to consider using vegetable oil to replace diesel. Fatty acid methyl esters (i.e., biodiesel) are such an energy source, which comes from renewable vegetable oils or animal fats and reduces air pollutants as well as CO 2 emission. At present, countries all over the world are investing in the research and production of fatty acid methyl esters. The research on fatty acid methyl esters in my country has just started, but there is great potential for development....

Claims

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Application Information

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IPC IPC(8): C07C67/08C10G3/00
CPCY02P30/20
Inventor 强西怀段郑军张辉洪新球
Owner SHAANXI UNIV OF SCI & TECH
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