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Process for preparing Guerbet alcohol

A technology of Guerbet alcohol and preparation process, applied in the field of preparation technology of Guerbet alcohol, can solve the problems of iodine value not meeting national standards, affecting purity and stability, etc., and achieve good economic and social benefits, and can High controllability and simple post-processing effects

Inactive Publication Date: 2015-04-01
河北威铭生物科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the iodine value of the product prepared by this method does not meet the national standard after testing, which will affect its purity and stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 200g n-decyl alcohol, 10% fatty alcohol weight solid base catalyst, 1% fatty alcohol weight nano-nickel powder in a three-necked flask equipped with an inset thermometer, water separator, reflux condenser, nitrogen gas pipe, magnetic force Into the stirred three-neck flask, continue to infuse nitrogen at 0.1L / min, and rapidly increase the temperature to 200℃. After 1.5 hours of reaction, change the nitrogen to hydrogen until the internal pressure of the reactor reaches 0.5MPa, quickly increase the temperature to 180℃, and continue the reaction for 1.5 hours. After hours, cooled to room temperature and suction filtered to obtain a high-purity product. The iodine value was determined to be 0.5.

Embodiment 2

[0021] Weigh 200g of n-decyl alcohol, 10% fatty alcohol weight solid base catalyst, 2% fatty alcohol weight amorphous nickel alloy into a three-necked flask equipped with an insert thermometer, water separator, reflux condenser, and nitrogen gas pipe 、In a three-necked flask with magnetic stirring, continue to pour in nitrogen 0.1L / min, and quickly raise the temperature to 200°C. After 1.5 hours of reaction, change the nitrogen to hydrogen until the pressure in the reactor reaches 1.0MPa, and quickly raise the temperature to 160°C. Reacted for 1.5 hours, cooled to room temperature and suction filtered to obtain a high-purity product. The iodine value was determined to be 0.2.

Embodiment 3

[0023] Weigh 200g of n-decyl alcohol, 10% of fatty alcohol weight of solid base catalyst, 4% of fatty alcohol weight of alumina supported metal nickel catalyst in a three-necked flask equipped with an inset thermometer, water separator, reflux condenser, nitrogen Into a three-necked flask with gas guide tube and magnetic stirring, 0.1L / min of nitrogen was continuously introduced, and the temperature was rapidly raised to 200°C. After 1.5 hours of reaction, the nitrogen was changed to hydrogen until the pressure in the reactor reached 1.5MPa, and the temperature was quickly raised to 170°C. , Continue to react for 1.5 hours, cool to room temperature and filter with suction to obtain a high-purity product. The iodine value is 0.1.

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Abstract

The invention provides a process for preparing Guerbet alcohol. The process comprises the following steps: (a) weighing 100-200g of a fatty alcohol, a solid base catalyst and a nickel-based catalyst, adding into a three-necked flask which is provided with a thermometer, a water distributor, a reflux condensing tube, a nitrogen introducing tube and a magnet stirrer, introducing nitrogen into the three-necked flask continuously, increasing temperature to 200 DEG C rapidly, carrying out reaction for 1.5 hours, decreasing temperature after reaction, filtering a product of reaction at room temperature, separating the catalysts from the product of reaction, and distilling an obtained filtrate by reducing pressure to obtain a product, wherein the weight of the solid base catalyst is 5-15% of that of the fatty alcohol, and the weight of the nickel-based catalyst is 0.5-5.5% of that of the fatty alcohol; and (b) adding the product obtained in the step (a) and a nickel-based catalyst into a sealed reactor, replacing air in the reactor with nitrogen, controlling the pressure at 0.1-2.0MPa and the temperature at 120-280 DEG C with hydrogen, carrying out reaction under pressure for 1-3 hours, cooling a product of reaction to normal temperature, filtering to obtain a high-purity product, and measuring the iodine number, wherein the weight of the nickel-based catalyst is 1-5% of that of the product obtained in the step (a). The process provided by the invention has the advantages of strong operability, simple post-treatment process and significant improvement of product purity and is suitable for industrial production.

Description

Technical field [0001] The invention relates to the field of chemical engineering, in particular to a preparation process of Guerbet alcohol. Background technique [0002] Guerbet alcohol is formed by aldol condensation of low-molecular-weight fatty alcohols, so that two alcohol molecules form a branched high-carbon isomeric fatty alcohol at the β position of the hydroxyl group, which is actually an isomeric alcohol. Guerbet alcohol is a saturated alcohol with the characteristics of a fatty primary alcohol, and has good oxidation stability at high temperatures; Guerbet alcohol is characterized by a large branched chain structure, a high molecular weight, and a liquid state at low temperatures, irritating Low performance, low boiling point and other characteristics; due to the special excellent properties of Guerbet alcohol, it determines that it has good wetting, lubricating and penetrating properties, and has become an important and excellent fatty alcohol in the industry. raw ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/34C07C29/90C07C31/02C07C31/125
CPCC07C29/34C07C29/90C07C31/02C07C31/125
Inventor 姚志龙张芳周明毛进池张胜红孙培永
Owner 河北威铭生物科技有限公司
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