2-methylfuran preparation catalyst by gas-phase hydrogenation of furfural

A kind of methylfuran and catalyst technology, applied in the catalyst and preparation field of furfural gas-phase hydrogenation to produce 2-methylfuran, can solve problems such as serious environmental pollution, achieve high activity and selectivity, and achieve the effect of less pollution

Inactive Publication Date: 2009-05-06
CHINA NAT ACAD NANOTECH & ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst can obtain a high product yield, but the catalyst contains Cr, which causes serious environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: a kind of preparation method of the catalyst of furfural gas-phase hydrogenation system 2-methylfuran, it is characterized in that what catalyst adopts is co-precipitation and microwave method, concrete steps are as follows: catalyst composition: CuO accounts for 18% of gross weight, ZnO 5% by weight, Al 2 o 3 77% of the total weight. The catalyst preparation process: 54.36 grams of copper nitrate, 18.27 grams of zinc nitrate, and 565 grams of aluminum nitrate were prepared into a 1M solution, the mixed solvent was added to 270 grams of 1M sodium carbonate, and the precipitate was filtered with distilled water. The precipitate was then dried in a drying chamber at 100° C. for 5 hours. During the drying period, the precipitate was stirred every half hour to make it dry evenly, and then it was roasted in a muffle furnace at 400° C. for 4 hours and then microwaved for 3 minutes in a microwave oven to prepare the catalyst.

Embodiment 2

[0018] Embodiment 2: a kind of preparation method of the catalyst of furfural gas-phase hydrogenation system 2-methylfuran, it is characterized in that what catalyst adopts is co-precipitation and microwave method, concrete steps are as follows: catalyst composition: CuO accounts for 20% of gross weight, ZnO 5% by weight, Al 2 o 3 75% of the total weight. The catalyst preparation process: 60.4 grams of copper nitrate, 18.27 grams of zinc nitrate, and 550.32 grams of aluminum nitrate were prepared into a 1M solution, the mixed solvent was added to 266.80 grams of 1M sodium carbonate, and the precipitate was filtered with distilled water. The precipitate was then dried in a drying chamber at 110° C. for 5 hours. During the drying period, the precipitate was stirred every half hour to make it dry evenly, and then it was roasted in a muffle furnace at 450° C. for 4 hours and then microwaved for 5 minutes in a microwave oven to prepare the catalyst.

Embodiment 3

[0019] Embodiment 3: a kind of preparation method of the catalyst of furfural gas-phase hydrogenation system 2-methylfuran, it is characterized in that what catalyst adopts is co-precipitation and microwave method, concrete steps are as follows: catalyst composition: CuO accounts for 22% of gross weight, 3% by weight of ZnO, Al 2 o 3 75% of the total weight. The catalyst preparation process: 66.44 grams of copper nitrate, 10.96 grams of zinc nitrate, and 550.32 grams of aluminum nitrate were prepared into a 1M solution, the mixed solvent was added to 303.16 grams of 1M sodium carbonate, and the precipitate was filtered with distilled water. The precipitate was then dried in a drying chamber at 110° C. for 10 hours. During the drying period, the precipitate was stirred every half hour to make it dry evenly, and then it was roasted in a muffle furnace at 500° C. for 8 hours and then microwaved for 10 minutes in a microwave oven to prepare the catalyst.

[0020] The reaction p...

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PUM

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Abstract

The invention discloses a catalyst that is used for preparing 2-dimethylfuran by furfural gas phase hydrogenation, and is characterized in that the catalyst consists of an active component CuO, a metallic oxide addition agent ZnO and a carrier Al2O3 that are mixed; wherein, the weight percentage of the active component CuO is 18 to 22 percent, the weight percentage of the metallic oxide addition agent ZnO is 3 to 7 percent, and the weight percentage of the carrier Al2O3 is 73 to 77 percent. The preparation method of the catalyst adopts a coprecipitation and microwave method, which comprises the steps of: (1) solution preparation, (2) precipitate generation, (3) precipitate rinsing, (4) precipitate drying, (5) precipitate baking and (6) microwave processing. The invention has the advantages that the catalyst has extremely high activity and selectivity, can achieve the furfural transformation rate of 100 percent and the 2-dimethylfuran selectivity of over 90 percent, and the catalyst does not contain Cr that is harmful to human body and has less environmental pollution.

Description

(1) Technical field: [0001] The invention relates to a catalyst for producing 2-methylfuran, in particular to a catalyst for preparing 2-methylfuran by gas-phase hydrogenation of furfural and a preparation method thereof. (two) background technology: [0002] 2-Methylfuran is an organic raw material, based on which a series of organic products can be synthesized, such as pentadiene, pentanediol, acetylpropanol and ketones; it is also a good solvent and is often used in the solution compounding process; It is also a pharmaceutical intermediate, used to prepare vitamin B1, chloroquine phosphate, primaquine phosphate, etc. [0003] At present, 2-methylfuran is mainly produced in industry by gas-phase catalytic hydrogenation of furfural. my country is a big producer of furfural, with an annual production of about 150,000 tons of furfural, most of which become cheap raw materials for export, and the required 2-methylfuran is obtained through imports. The main reason for this ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J23/835C07D307/36
Inventor 张东
Owner CHINA NAT ACAD NANOTECH & ENG
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