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Copper-based catalyst and preparation method and application thereof

A technology of copper-based catalysts and solvents, which is applied in the field of copper-based catalysts, preparation and application, can solve the problems of easy pulverization of catalysts, complicated preparation process, and low catalytic activity, and achieve improved catalytic activity, good preparation repeatability, increased The effect of large specific surface area

Inactive Publication Date: 2016-03-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a copper-based Catalyst, preparation method and application thereof

Method used

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  • Copper-based catalyst and preparation method and application thereof

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Effect test

Embodiment 1

[0044] Weigh 72gCu(NO 3 ) 2 ·3H 2 O, 178.5gZn(NO 3 ) 2 ·6H 2 O and 37.5gAl(NO 3 ) 3 9H 2 O is dissolved in deionized water to form a mixed solution with a molar concentration of 1mol / L, in which Cu 2+ : Zn 2+ :Al 3+ The molar ratio is 3:6:1; Weigh 115g of ammonium carbonate and dissolve it in 1L of deionized water to make a 1.2mol / L aqueous solution. The two solutions were fed and reacted in parallel at 80° C., and the pH value of the reaction was controlled to be about 8.0. Continue to stir for 12 hours after the feed is complete, age for 10 hours, filter the precipitate, wash with deionized water, dry at 80°C for 12 hours, and then heat up to 500°C in a muffle furnace for 5 hours at a rate of 3°C / min. . Finally, 2% graphite of the total mass of the obtained substance was added, and the catalyst sample A was obtained by tableting in a tablet press.

Embodiment 2

[0046] Weigh 108.7gCu(NO 3 ) 2 ·3H 2 O, 134gZn(NO 3 ) 2 ·6H 2 O, and 37.5gAl(NO 3 ) 3 9H 2 O is dissolved in deionized water to form a mixed solution with a molar concentration of 1mol / L, in which Cu 2+ : Zn 2+ :Al 3+ The molar ratio is 4.5:4.5:1; Weigh 115g of ammonium carbonate and dissolve it in 1L of deionized water to make a 1.2mol / L aqueous solution. The two solutions were fed and reacted in parallel at 80° C., and the pH value of the reaction was controlled to be about 8.0. Continue to stir for 12 hours after feeding, age for 6 hours, filter the precipitate, wash with deionized water, dry at 80°C for 12 hours, and then heat up to 500°C in a muffle furnace for 5 hours at a rate of 3°C / min. . Finally, 2% graphite of the total mass of the obtained substance was added, and the catalyst sample B was obtained by tableting in a tablet press.

Embodiment 3

[0048] Weigh 48gCu(NO 3 ) 2 ·3H 2 O, 208gZn(NO 3 ) 2 ·6H 2 O, and 37.5gAl(NO 3 ) 3 9H 2 O is dissolved in deionized water to form a mixed solution with a molar concentration of 1mol / L, in which Cu 2+ : Zn 2+ :Al 3+ The molar ratio is 2:7:1; Weigh 115g of ammonium carbonate and dissolve it in 1L of deionized water to make a 1.2mol / L aqueous solution. The two solutions were fed and reacted in parallel at 80° C., and the pH value of the reaction was controlled to be about 8.0. Continue to stir for 12 hours after the feed is complete, age for 12 hours, filter the precipitate, wash with deionized water, dry at 80°C for 12 hours, and then heat up to 500°C in a muffle furnace for 5 hours at a rate of 2°C / min. . Finally, 2% graphite was added to the total mass of the obtained substance, and the catalyst sample C was obtained by tableting in a tablet press.

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Abstract

The invention discloses a copper-based catalyst and a preparation method and application thereof. The preparation method of the copper-based catalyst comprises the following steps that 1, a solution formed by soluble salt of copper, zinc and aluminum and a solvent and a solution formed by ammonium precipitator and a solvent are mixed and subjected to a precipitin reaction, and a coprecipitate precursor is obtained; 2, the coprecipitate precursor is aged, filtered, washed, dried and calcined to obtain coprecipitate; 3, the coprecipitate is tableted, or the coprecipitate and graphite are mixed and tableted to obtain the copper-based catalyst. No precipitator containing alkali metal ions is adopted in the preparation method, waste water pollution is avoided, the conditions are easier to control, preparation repeatability is good, the preparation cost of a fatty alcohol dehydrogenation catalyst can be reduced, and industrial potential is achieved. According to the copper-based catalyst, the specific surface area of the catalyst can be effectively increased, the dispersity of active ingredients on a carrier can be improved, and catalytic activity, selectivity and stability can be improved.

Description

technical field [0001] The invention specifically relates to a copper-based catalyst, a preparation method and an application thereof. Background technique [0002] Dehydrogenation of fatty alcohols to prepare fatty aldehydes is a very important chemical production process. Fatty aldehydes are widely used in the perfume industry for the preparation of rose, carnation, orange blossom and other flavors. At present, the alcohol dehydrogenation reaction mainly adopts Cu-Zn-Al catalyst, which is prepared by co-precipitation method, adding a co-precipitant containing alkali metal, such as sodium carbonate, sodium bicarbonate or potassium carbonate, etc., its catalytic activity is low, and the product selection The catalyst has poor reproducibility, and the precipitation conditions are difficult to control. At the same time, alkali metal sodium and potassium will reduce the activity of the catalyst. Repeated washing will consume a lot of clean water, which increases the complexity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J35/10C07C45/51C07C47/02
CPCC07C45/512B01J23/002B01J23/80B01J37/03B01J2523/00B01J35/61B01J2523/17B01J2523/27B01J2523/31C07C47/02
Inventor 陈立芳漆志文尤陈佳
Owner EAST CHINA UNIV OF SCI & TECH
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