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Production method of Guerbet alcohol

A technology for Guerbet alcohols and fatty alcohols, applied in the field of preparing Guerbet alcohols, can solve the problems of reactor corrosion, catalysts that cannot be reused, and unresolved problems, so as to improve the yield, simplify the product post-treatment process, The effect of avoiding environmental problems

Active Publication Date: 2008-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method still cannot avoid the generation of soap in the reaction process, which affects the yield of the product, the catalyst still cannot be reused, and the problem of reactor corrosion is not solved.

Method used

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  • Production method of Guerbet alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weighing 160g decanol, 40g MgO / NaY (loading capacity is 15% by weight) catalyzer, and 0.6g nickel powder are mixed and put into 250ml with stirring, in the three-necked reaction flask of water trap, fully stir and be warming up to 230 ℃, During the reaction process, the water produced by the reaction was continuously separated from the reaction system through the water separator, and the reaction was carried out for 60 minutes before the reaction was terminated. After the reactant was cooled, it was filtered. The filtrate can be distilled under reduced pressure to obtain C20 Guerbet alcohol with a purity of more than 95% (results are shown in Table 1). The filtered catalyst is recovered, washed with ethanol, filtered again, and then baked in an oven at 200°C for 3 Hour. The regenerated catalyst can continue to be used.

Embodiment 2

[0024] Weigh 160g octanol, 45g MgO / NaY (loading capacity is 8% by weight) catalyzer, and 0.4g nickel powder are mixed and put into 250ml with stirring, the three-necked reaction flask of water trap, fully stir and be warming up to 220 ℃, During the reaction process, the water produced by the reaction was continuously separated from the reaction system by a water separator, and the reaction was carried out for 50 minutes before the reaction was terminated. After the reactant was cooled, it was filtered. The filtrate can be distilled under reduced pressure to obtain C16 Guerbet alcohol with a purity of more than 95% (results are shown in Table 1). The filtered catalyst is recovered, washed with ethanol, filtered again, and then dried in an oven at 200°C for 3 Hour. The regenerated catalyst can continue to be used.

Embodiment 3

[0026] Weigh 160g dodecanol, 25g MgO / NaY (loading capacity is 25% by weight) catalyzer, and 0.6g nickel powder are mixed and put into 250ml three-necked reaction flasks that have stirring, water separator, fully stir and be warming up to 250 ℃ During the reaction process, the water produced by the reaction was continuously separated from the reaction system through the water separator, and the reaction was carried out for 80 minutes to terminate the reaction. After the reactant was cooled, it was filtered. The filtrate is distilled under reduced pressure to obtain C24 Guerbet alcohol with a purity of more than 95% (results are shown in Table 1). The catalyst that is filtered out is recovered, washed with ethanol, filtered again, and then baked in an oven at 200°C for 3 Hour. The regenerated catalyst can continue to be used.

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Abstract

Production of Guerbet alcohol is carried out by mixing C6-C30 fatty alcohol with zeolite molecular sieve catalyst carried with solid alkali and nickel powder, and condensation reacting at 100-270 degree. The solid alkali is selected from hydroxide, oxide or halide of alkali metal or alkali earth metal, the carrier quantity of solid alkali on zeolite molecular sieve is 1-50wt%, quantity of catalyst is 5-35wt%, and quantity of nickel is 0.05-1wt%. It has more yield and no environmental pollution.

Description

technical field [0001] The invention relates to a method for preparing Guerbet alcohols from C6-C30 fatty alcohols. 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 is becoming more and more extensive. [0003] In the prior art, there are several methods for preparing Guerbet alcohols by condensation of C6-C30 fatty 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 carbon atoms. However, the reaction yield of this method is generally...

Claims

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Application Information

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