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Copper-based catalyst for synthesis of 2, 3-dihydrofuran, preparation method and application thereof

A technology of copper-based catalysts and dihydrofuran, which is applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of long production process routes, high production costs, Complicated operation and other problems, to achieve the effect of reducing production costs, high selectivity, and simplifying the process flow

Active Publication Date: 2018-01-26
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cobalt-based catalysts are difficult to reduce, resulting in long production process routes for 2,3-dihydrofuran, complex operations, and high production costs

Method used

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  • Copper-based catalyst for synthesis of 2, 3-dihydrofuran, preparation method and application thereof
  • Copper-based catalyst for synthesis of 2, 3-dihydrofuran, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Based on the total amount of catalyst: CuO content is 50%, SiO 2 The content is 45%, Al 2 o 3 The content is 5%. Prepare a copper nitrate and aluminum nitrate mixed solution according to the proportions of the catalyst components, wherein the total concentration of metal ions is 1mol / L, then add acidic silica sol, stir and mix evenly to obtain a mixed acid solution. Then prepare 1mol / L sodium carbonate solution as lye. Under the condition of strong stirring, add the above-mentioned acid solution and alkaline solution into the precipitation tank side-by-side to carry out co-precipitation. During the precipitation process, the pH value is controlled to be 7-8, and the precipitation temperature is 60-80°C. After the precipitation, aged for 12 hours, then filtered, washed 5 times, dried at 120°C for 12h, and calcined at 450°C for about 4 hours to obtain CuO / SiO 2 -Al 2 o 3 catalyst. Catalyst labeled as Cat1 reaction results are shown in Table 1.

Embodiment 2

[0071] Based on the total amount of catalyst: CuO content is 50%, SiO 2 Content is 40%, Al 2 o 3 The content is 10%. Prepare a copper nitrate and aluminum nitrate mixed solution according to the proportions of the catalyst components, wherein the total concentration of metal ions is 1mol / L, then add acidic silica sol, stir and mix evenly to obtain a mixed acid solution. Then prepare 1mol / L sodium carbonate solution as lye. Under the condition of strong stirring, add the above-mentioned acid solution and alkaline solution into the precipitation tank side-by-side to carry out co-precipitation. During the precipitation process, the pH value is controlled to be 7-8, and the precipitation temperature is 60-80°C. After the precipitation, aged for 12 hours, then filtered, washed 5 times, dried at 120°C for 12h, and calcined at 450°C for about 4 hours to obtain CuO / SiO 2 -Al 2 o 3 catalyst. Catalyst labeled as Cat2 reaction results are shown in Table 1.

Embodiment 3

[0073] Based on the total amount of catalyst: CuO content is 50%, SiO 2 Content is 35%, Al 2 o 3 The content is 15%. Prepare a copper nitrate and aluminum nitrate mixed solution according to the proportions of the catalyst components, wherein the total concentration of metal ions is 1mol / L, then add acidic silica sol, stir and mix evenly to obtain a mixed acid solution. Then prepare 1mol / L sodium carbonate solution as lye. Under the condition of strong stirring, add the above-mentioned acid solution and alkaline solution into the precipitation tank side-by-side to carry out co-precipitation. During the precipitation process, the pH value is controlled to be 7-8, and the precipitation temperature is 60-80°C. After the precipitation, aged for 12 hours, then filtered, washed 5 times, dried at 120°C for 12h, and calcined at 450°C for about 4 hours to obtain CuO / SiO 2 -Al 2 o 3 catalyst. The catalyst is marked as Cat3 and the reaction results are shown in Table 1.

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Abstract

The invention discloses a copper-based catalyst for synthesis of 2, 3-dihydrofuran, a preparation method and application thereof. The copper-based catalyst CuO / SiO2-Al2O3 for synthesis of 1, 4-butanediol to prepare 2, 3-dihydrofuran consists of the following components by mass percentage: 40-60% of CuO; 10-40% of SiO2; and 10-40% of Al2O3. The copper-based catalyst CuO / SiO2-Al2O3 provided by the invention has dehydrogenation-dehydration double functions in the reaction of catalyzing 1, 4-butanediol to prepare 2, 3-dihydrofuran. The dehydrogenation functional component is CuO, and the dehydrating functional component is SiO2-Al2O3. The dehydrogenation ability and the dehydration ability of the catalyst are reasonably matched, and 2, 3-dihydrofuran has high selectivity. The raw material conversion rate of the catalytic reaction can reach 100%, and the target product selectivity is higher than 85%. The dehydrogenation-dehydration difunctional CuO / SiO2-Al2O3 catalyst provided by the invention can directly be mixed with raw materials for use, has no need for off-line prereduction, and simplifies the technological process. Compared with existing methods, the dehydrogenation-dehydration difunctional CuO / SiO2-Al2O3 catalyst is low in prices. Also the catalyst has high dehydrogenation and dehydrating capacity, and is reasonably matched, and can achieve high selectivity preparation of 2,3-dihydrofuran.

Description

technical field [0001] The invention relates to a copper-based catalyst for synthesizing 2,3-dihydrofuran, a preparation method and application thereof, and belongs to the technical field of catalyst preparation. Background technique [0002] 2,3-Dihydrofuran (2,3-Dihydrofuran, referred to as: 2,3-DHF), molecular formula: C 4 h 6 O, molecular weight: 70.1, boiling point: 54.5°C, density: 0.91g / cm 3 , Slightly soluble in water. 2,3-Dihydrofuran is a very important pharmaceutical intermediate with active properties, and its derivatives can be used to prepare a variety of pharmaceutical chemicals, such as: 7-ethyl tryptophan, isotropic acid, tegafur, cyclopropane Formaldehyde, 2-hydroxytetrahydrofuran, etc. [0003] [0004] It has been found that 1,4-butanediol can generate 2,3-dihydrofuran through dehydrogenation-dehydration reaction. However, there are relatively few public research reports on the synthesis of 2,3-dihydrofuran by dehydrogenation-dehydration of 1,4-bu...

Claims

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Application Information

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IPC IPC(8): B01J23/72C07D307/28
Inventor 丁国强郑洪岩李显清高晓庆朱玉雷杨勇李永旺
Owner SYNFUELS CHINA TECH CO LTD
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