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Method for improving alcohol dehydrogenation conversion rate

A conversion rate and dehydrogenation technology, which is applied in the separation/purification of carbonyl compounds, organic chemistry, and oxidation to carbonyl compounds, etc., can solve the problems of low conversion rate of alcohol dehydrogenation, and achieve simple dehydrogenation process, easy operation, and conversion. high rate effect

Inactive Publication Date: 2011-11-23
YANTAI UNIV
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AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for increasing the conversion rate of alcohol dehydrogenation aiming at the deficiency of low conversion rate of alcohol dehydrogenation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Preparation of CuO-ZnO-Al according to Chinese invention patent CN1289753 2 o 3 Prepare methyl ethyl ketone catalyst A by dehydrogenating sec-butanol, then dehydrogenate sec-butanol at 240°C and normal pressure, and control the liquid space velocity of sec-butanol at 4h -1 , with N 2 As diluent, the feed molar ratio of nitrogen to sec-butanol was 5. After the reaction was over, sec-butanol and methyl ethyl ketone were separated by cooling. The one-pass conversion rate of sec-butanol is 80.2%, and the selectivity of methyl ethyl ketone is 99.1%.

Embodiment 2

[0015] Prepare CuO-ZnO-Al according to Chinese invention patent CN101757922A 2 o 3 Prepare cyclohexanone catalyst B by dehydrogenating cyclohexanol, then dehydrogenate cyclohexanol at 260°C and normal pressure, and control the liquid space velocity of cyclohexanol at 4h -1 , using He as the diluent, and the feed molar ratio of helium to cyclohexanol was 10. After the reaction, cyclohexanol and cyclohexanone were separated by cooling. The one-pass conversion rate of cyclohexanol is 70.7%, and the selectivity of cyclohexanone is 99.2%.

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Abstract

The invention relates to a method for improving alcohol dehydrogenation conversion rate. The method for improving the alcohol dehydrogenation conversion rate comprises the following steps of: feeding alcohol and adding at least one thinner into a reaction system to prepare ketone and hydrogen; and cooling alcohol and ketone after the reaction is finished. The alcohol dehydrogenation process is simple and convenient for operation, and the conversion rate of the alcohol is obviously higher than that of the conventional alcohol dehydrogenation process.

Description

technical field [0001] The invention relates to a method for improving the conversion rate of alcohol dehydrogenation, which belongs to the technical field of organic synthesis. Background technique [0002] The dehydrogenation of alcohols to the corresponding ketones is a very important industrial production process, such as the dehydrogenation of isopropanol to acetone, the dehydrogenation of sec-butanol to methyl ethyl ketone, the dehydrogenation of cyclohexanol to cyclohexanone, etc. CuO-ZnO-Al is used to prepare ketones by dehydrogenation of most alcohols 2 o 3 catalyst. For example, Chinese invention patents CN100360228C and CN1101262C respectively disclose CuO-ZnO-Al 2 o 3 Catalyst for preparing methyl ethyl ketone by dehydrogenation of sec-butanol; Chinese invention patent CN101757922A discloses a CuO-ZnO-Al 2 o 3 Cyclohexanol dehydrogenation to prepare cyclohexanone catalyst, etc. The above reactions are all carried out under gas phase conditions, using pure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/29C07C45/86C07C49/10C07C49/403
Inventor 房德仁任万忠张慧敏
Owner YANTAI UNIV
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