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Method for preparing fatty alcohol through in-situ hydrogenation of fatty acid

An in-situ hydrogenation and fatty acid technology is applied in chemical instruments and methods, preparation of hydroxyl compounds, and preparation of organic compounds. It can solve problems such as high price, reduced purity of reaction products, and obstacles to industrialization. The effect of economy, reduction of pollution and harm to human body

Active Publication Date: 2017-12-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the solvent used in this method to obtain high-yield products is mainly dodecane, and its high price has become the main reason hindering the industrialization of this process.
Secondly, when only the alcohol system is used in the reaction system, the purity of the obtained reaction product will be significantly reduced, including impurity products alkane, alcohol methyl ether, acid methyl ester and isomers

Method used

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  • Method for preparing fatty alcohol through in-situ hydrogenation of fatty acid
  • Method for preparing fatty alcohol through in-situ hydrogenation of fatty acid
  • Method for preparing fatty alcohol through in-situ hydrogenation of fatty acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 5g lauric acid, 5g methanol, 1.5gCu-Al 2 o 3 Mix with 50mL deionized water, stir, heat up to 330°C and react for 3h, after the reaction is over, cool to room temperature, the liquid phase product is allowed to stand and separate, and the separated organic phase is fixed to volume with acetone, then quantitatively analyzed by GC-FID, and the calculation The conversion rate of lauric acid was 100%, and the molar yield of dodecyl alcohol was 99.1%.

Embodiment 2

[0036] According to the preparation in Example 1, only the amount of methanol added was changed to 0.5 g, the calculated conversion rate of lauric acid was 21.1%, and the molar yield of dodecanol was 20.9%.

Embodiment 3

[0038] According to the preparation in Example 1, only changing the amount of methanol added to 1 g, the calculated conversion rate of lauric acid is 45.4%, and the molar yield of dodecanol is 44.9%.

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Abstract

The invention relates to a method for preparing fatty alcohol through in-situ hydrogenation of fatty acid. The method comprises the following steps: mixing fatty acid, hydrogen donor alcohol, solvent water and a Cu-based catalyst for reacting; heating to 300-350 DEG C; reacting for 0.5-7h to obtain the fatty alcohol. According to the method, the fatty alcohol is prepared in a hydrogen-free condition, and the yield of the product fatty alcohol is further increased.

Description

technical field [0001] The invention relates to the field of preparation of fatty alcohols, in particular to a method for preparing fatty alcohols by in-situ hydrogenation of fatty acids. Background technique [0002] Fatty alcohol is an important biomass platform compound. It is the main basic raw material for the production of various fine chemicals such as detergents, plasticizers, and surfactants. It is widely used in medicine, food, and cosmetics. , plastic antioxidants and other industries [Zhang Shuang, Chemical Science and Technology, (2011) 19]. [0003] At present, the method of producing fatty alcohols from fatty acids is mainly hydrogenation reaction of fatty acids under high-pressure hydrogen. This method needs to consume a large amount of hydrogen. At the same time, due to the need for high-pressure hydrogen to be added, the airtightness and material of the reaction device have to be raised. higher requirements. my country mainly uses fossil energy such as co...

Claims

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Application Information

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IPC IPC(8): C07C29/149C07C31/125
CPCC07C29/149C07C31/125
Inventor 傅杰张子豪周峰吕秀阳欧阳平凯
Owner ZHEJIANG UNIV
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