Catalyst for preparing methyl ethyl ketone through dehydrogenation of sec-butyl alcohol and preparation method thereof

A technology of catalyst and sec-butanol, which is applied in chemical instruments and methods, preparation of carbon-based compounds, preparation of organic compounds, etc., can solve the problems of catalyst pore blockage, catalyst selectivity reduction, deactivation, etc., and achieve high conversion rate, The preparation process is simple and the effect of improving selectivity

Inactive Publication Date: 2014-02-26
DAQING ZHONGLAN PETROCHEMICAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for sec-butanol dehydrogenation reaction, SiO 2 While effectively dispersing the active center Cu, it also leads to the occurrence of side reactions. For example, the acidic position in the carrier is conducive to the intermolecular dehydration side reaction of sec-butanol to generate butene, resulting in a decrease in the selectivity of the cataly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 45.38gCu(NO 3 ) 2 ·3H 2 O was added with 289ml of distilled water to make a 0.65mol / L aqueous solution, and another 37.87gNa 2 SiO 3 .9H 2 O was added with 205ml of distilled water to make a 0.65mol / L aqueous solution. Transfer the two solutions to the separating funnel respectively, and drop them into the 1000ml beaker containing 200ml acetic acid-ammonium acetate buffer solution at a constant speed by the method of co-current titration. The pH value of the solution was controlled at 5.5 by the buffer solution, and the titration process was maintained at 0.5h. After the titration, the stirring was continued for 5 minutes and then the stirring was stopped. The mother liquor was aged at a constant temperature of 30°C for 2h, then moved to a Buchner funnel and washed with distilled water until the conductivity was lower than 500μs / cm, then filtered and dried at 120°C for 4h, 500 It was calcined at ℃ for 5 hours to make 20-40 mesh particles to obtain 19.7 g of the pa...

Embodiment 2

[0014] 45.38gCu(NO 3 ) 2 ·3H 2 O was added with 289ml of distilled water to make a 0.65mol / L aqueous solution, and another 37.87gNa 2 SiO 3 .9H 2 O was added with 205ml of distilled water to make a 0.65mol / L aqueous solution. Transfer the two solutions to the separating funnel respectively, and drop them into the 1000ml beaker containing 200ml acetic acid-ammonium acetate buffer solution at a constant speed by the method of co-current titration. The pH value of the solution was controlled at 5.5 by the buffer solution, and the titration process was maintained at 0.5h. After the titration, the stirring was continued for 5 minutes and then the stirring was stopped. The mother liquor was aged at a constant temperature of 30°C for 2h, then moved to a Buchner funnel and washed with distilled water until the conductivity was lower than 500μs / cm, then filtered and dried at 120°C for 4h, 500 It was calcined at ℃ for 5 hours to make 20-40 mesh particles to obtain 19.7 g of the pa...

Embodiment 3

[0016] 52.94g Cu(NO 3 ) 2 ·3H 2 O was added with 337ml of distilled water to make a 0.65mol / L aqueous solution, and 28.40g of Na 2 SiO 3 .9H 2 O was added with 154ml of distilled water to form a 0.65mol / L aqueous solution. Move the two solutions to the separatory funnel respectively, and drop them into the 1000ml beaker equipped with 200ml potassium hydrogen phthalate buffer solution at a constant speed by the method of co-current titration. When the pH value of the solution was 4, the titration process was maintained at 0.5h. After titration, keep stirring for 5 minutes and stop stirring. The mother liquor is aged at a constant temperature of 30°C for 2h, then moved to a Buchner funnel and washed with distilled water until the conductivity is lower than 500μs / cm, then filtered, dried at 120°C for 10h, 500 Roasting at ℃ for 5 hours to make 20-40 mesh particles, the parent catalyst that needs to be modified in this experiment is obtained. Solution, the solution concentra...

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Abstract

The invention relates to a catalyst for preparing methyl ethyl ketone through the dehydrogenation of sec-butyl alcohol and a preparation method thereof. The catalyst takes CuO and SiO2 as active components, and takes M2O as a modifier; and the catalyst comprises the following components in percentage by mass: 50-68% of CuO, 9.5-30% of SiO24, and 0.1%-10% of M2O. The preparation method of the catalyst comprises the following steps: firstly, preparing a Cu/SiO2 catalyst by using a coprecipitation method, and forming the Cu/SiO2 catalyst by tabletting; and then, soaking the catalyst by using a potassium or sodium salt solution, and drying and roasting the catalyst so as to obtain the modified catalyst. The catalyst disclosed by the invention is simple in preparation process; and when the catalyst is applied to a process for preparing methyl ethyl ketone through the dehydrogenation of sec-butyl alcohol, a high conversion rate of sec-butyl alcohol is kept, and the selectivity of methyl ethyl ketone is further improved.

Description

technical field [0001] The invention relates to a catalyst for the dehydrogenation of sec-butanol and a method for preparing the catalyst. Background technique [0002] In the process of preparing methyl ethyl ketone by the dehydrogenation of sec-butanol, with the continuous improvement of industrial application requirements, the development of high-performance sec-butanol dehydrogenation catalysts has been attracting attention. Currently Cu / SiO 2 Catalyst research has also achieved some results, not only has a high dehydrogenation activity, but also has good thermal stability. But for sec-butanol dehydrogenation reaction, SiO 2 While effectively dispersing the active center Cu, it also leads to the occurrence of side reactions. For example, the acidic position in the carrier is conducive to the intermolecular dehydration side reaction of sec-butanol to generate butene, resulting in a decrease in the selectivity of the catalyst; the alkalinity of the carrier is too strong ...

Claims

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Application Information

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IPC IPC(8): B01J23/78C07C49/10C07C45/00
Inventor 胡云峰刘军生黄振军王立峰范振忠张志超陈震董鸿飞
Owner DAQING ZHONGLAN PETROCHEMICAL CO LTD
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