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Prepn of Grerbet alcohol

A technology of Guerbet alcohols and fatty alcohols, which is applied in the preparation of organic compounds, chemical instruments and methods, and the preparation of hydroxyl compounds, and can solve the problems of high requirements for reaction conditions and many by-products

Inactive Publication Date: 2005-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the reaction yield of this method is generally 30%-50%, rarely more than 70%, and there are many by-products, and the reaction conditions are high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 160 grams of decanol, 7 grams of solid KOH and 0.8 grams of amorphous nickel and mix them into the reaction flask, stir well and raise the reaction temperature to 250 °C as soon as possible. Water was separated from the reaction system, and the reaction was carried out for 60 minutes. Terminate the reaction, cool the material, filter, and then obtain C with a purity of more than 90% by distillation 20 Guerbert ol. The results are shown in Table 1.

Embodiment 2

[0017] Weigh 160 grams of octanol, 7 grams of solid KOH and 0.6 grams of amorphous nickel and mix them into the reaction flask, stir well and make the reaction temperature rise to 220 °C as soon as possible. Water was separated from the reaction system. After the reaction is terminated, the material is cooled, filtered, and then the C with a purity of more than 90% can be obtained by distillation. 16 Guerbert ol. The results are shown in Table 1.

Embodiment 3

[0019] Weigh 160 grams of dodecyl alcohol, 7 grams of solid KOH and 0.8 grams of amorphous nickel and mix them into the reaction bottle, stir well and raise the reaction temperature to 250 ° C as soon as possible, and continuously pass the reaction through the water separator during the reaction. The water is separated from the reaction system. After the reaction is terminated, the material is cooled, filtered, and then the C with a purity of more than 90% can be obtained by distillation. 24 Guerbert ol. The results are shown in Table 1.

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Abstract

The invention provides a kind of preparation method of Guerbet alcohol, is to C 6 -C 30 Fatty alcohol, alkali metal hydroxide and amorphous nickel are mixed, and condensation reaction occurs at 160°C-260°C. The present invention is characterized in that a high-efficiency catalyst-amorphous nickel is selected. Compared with the existing preparation methods using transition metals such as nickel powder or noble metal powders, the advantage is that the yield of Guerbet alcohol is improved, And reduce the occurrence of polyreaction and the formation of by-products.

Description

technical field [0001] The present invention relates to a method for preparing high-purity fatty alcohols (Guerbet alcohols) with branched chains attached to the second carbon. technical background [0002] Guerbet alcohol is a useful intermediate for the preparation of detergents, pharmaceuticals and cosmetics, and can also be used directly as a lubricant component or lubricant additive. In addition, due to the characteristics of high molecular weight Guerbet alcohol, such as low freezing point, low volatility, and non-irritating, its application will become increasingly widespread. [0003] In the prior art by C 6 -C 30 There are several ways to prepare Guerbet alcohols by condensation of aliphatic primary or secondary alcohols: [0004] The earliest process is that in the presence of metal sodium or copper, the α-position unbranched primary alcohol can undergo condensation reaction under high temperature and high pressure to generate a primary alcohol with doubled carb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/34C07C31/02
Inventor 陈晓伟汪孟言梁宇翔
Owner CHINA PETROLEUM & CHEM CORP
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