Method for catalytic synthesis of acetoin short chain fatty acid ester by using phosphotungstic acid

A technology of short-chain fatty acids and fatty acid esters, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylic acid esters, etc., can solve problems such as potential safety hazards and environmental pollution, and achieve low production costs, environmental friendliness, The effect of mild reaction conditions

Inactive Publication Date: 2015-04-29
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Raw materials such as acetic anhydride and acid chloride have great safety hazards in the process of preparation, transportation, and use, and they have also been questioned by people in terms of environmental pollution.

Method used

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  • Method for catalytic synthesis of acetoin short chain fatty acid ester by using phosphotungstic acid
  • Method for catalytic synthesis of acetoin short chain fatty acid ester by using phosphotungstic acid
  • Method for catalytic synthesis of acetoin short chain fatty acid ester by using phosphotungstic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 0.1798g acetoin (i.e. 3-hydroxy-2-butanone) into a sealed glass screw bottle, add butyric acid at a molar ratio of 1:2 (acetoin: short-chain fatty acid), add 0.0100g phosphotungstic acid . Shake the reaction at a constant temperature of 50°C, and the shaking speed is 150r / min. After 24 hours of reaction, a sample was taken and the concentration of the reaction product measured by gas chromatography was 36.44 g / L. The reaction product was identified as acetoin butyrate by gas chromatography-mass spectrometry.

Embodiment 2

[0019] Same as Example 1, but replace butanoic acid with 2-methylbutanoic acid. After 24 hours of reaction, the sample was taken and the concentration of the reaction product measured by gas chromatography was 10.05 g / L. The reaction product was identified as acetoin 2-methylbutyrate by gas chromatography-mass spectrometry.

Embodiment 3

[0021] Same as Example 1, but replace butanoic acid with 3-methylbutanoic acid. After 24 hours of reaction, the sample was taken and the concentration of the reaction product measured by gas chromatography was 13.24 g / L. The reaction product was identified as acetoin 3-methylbutyrate by gas chromatography-mass spectrometry.

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Abstract

The invention discloses a method for catalytic synthesis of acetoin short chain fatty acid ester by using phosphotungstic acid. The method comprises the following steps: mixing acetoin with various short chain fatty acids including butyric acid, 2-methyl-butyric acid, 3-methyl-butyric acid, valeric acid in a proportion, and performing catalytic reaction at 50 DEG C by using phosphotungstic acid to synthesize various acetoin short chain fatty acid ester type compounds. The method disclosed by the invention has the advantages of mild reaction condition, easily available raw materials, simple step, environment friendliness, low production cost and the like.

Description

technical field [0001] The invention belongs to the field of organic synthesis, in particular to a kind of phosphotungstic acid catalytic synthesis of acetoin butyrate, acetoin 2-methyl butyrate, acetoin 3-methyl butyrate, acetoin valeric acid ester method. Background technique [0002] Acetoin fatty acid ester compounds naturally exist in some special fruits, red wine, vinegar, flowers, etc., endowing them with specific fragrance. For example, papaya contains a series of acetoin ester derivatives such as acetoin acetate, acetoin butyrate, acetoin hexanoate, acetoin octanoate, etc. A class of main aroma substances. Certain varieties of bananas also contain small amounts of acetoin acetate and acetoin butyrate. [0003] The main use of acetoin fatty acid esters is as a spice in the food and beverage industry; in addition, some acetoin esters can also be used as organic solvents for epoxy resins and vinyl resins. Due to the important application value of acetoin fatty acid...

Claims

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Application Information

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IPC IPC(8): C07C69/24C07C67/08
CPCC07C67/08B01J27/188C07C69/24
Inventor 郗丽君侯孝元肖梓军
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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