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Steviol zirconium catalyst for catalyzing furfural hydrogenation to prepare furfuryl alcohol and preparation method of steviol zirconium catalyst

A steviol and catalyst technology, which is applied to the field of steviol zirconium catalyst and its preparation, can solve the problems of large amount of catalyst, cumbersome catalyst preparation process, harsh reaction conditions and the like, and achieves excellent coordination ability, excellent catalytic activity and simple preparation process. Effect

Active Publication Date: 2021-05-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of large amount of catalyst used in the existing furfural to furfuryl alcohol hydrogenation reaction, cumbersome catalyst preparation process and harsh reaction conditions

Method used

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  • Steviol zirconium catalyst for catalyzing furfural hydrogenation to prepare furfuryl alcohol and preparation method of steviol zirconium catalyst
  • Steviol zirconium catalyst for catalyzing furfural hydrogenation to prepare furfuryl alcohol and preparation method of steviol zirconium catalyst
  • Steviol zirconium catalyst for catalyzing furfural hydrogenation to prepare furfuryl alcohol and preparation method of steviol zirconium catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Take ZrCl 4 and stevia polyphenols were dissolved in DMF under the assistance of ultrasound, the mass ratio of the two was 1:1, and the stevia polyphenols solution was added dropwise to ZrCl 4 solution and keep stirring until the mixed solution is uniform, then seal it into a high-pressure reactor and keep the temperature at 120°C for 12 hours, naturally cool to room temperature, filter out the solid precipitate under reduced pressure, and use DMF, absolute ethanol and After washing with anhydrous ether, the obtained solid was dried in a vacuum oven at 80° C. for 12 hours. The obtained catalyst was zirconium steviolate, and its catalytic performance was tested.

Embodiment 2

[0046] According to ZrCl 4 With the mass ratio of 0.5:1 and 2:1 to stevia polyphenols, different zirconium steviolates were prepared by the preparation method in Example 1.

[0047] And carry out catalytic performance test to it:

[0048] (1) Take by weighing 1mmol furfural, 50mg catalyst zirconium steviolate and 5mL isopropanol join in the polytetrafluoroethylene container of 25mL with magnet and seal into reaction kettle;

[0049] (2) The above reaction kettle was placed in an oil bath at 120° C. and stirred for 2 hours; after the reaction, the reaction solution was centrifuged to obtain a supernatant for analysis.

[0050] After measurement, the catalytic results of different mass ratios are shown in Table 1.

[0051] Table 1 Different ZrCl 4 Catalytic result obtained by mass ratio with stevia polyphenols

[0052] mass ratio Conversion rate of furfural Furfuryl alcohol yield 0.1：1 37.5％ 30.4％ 0.5：1 75.6％ 72.0％ 1：1 98.2％ 95.4％ 2：1 99....

Embodiment 3

[0055] (1) Weigh 1mmol furfural, the zirconium stevia phenate catalyst prepared in 50mg embodiment 1 and 5mL isopropanol join in the 25mL reactor that has magneton, place the reactor respectively at 60, 80, 100, 120 Or stir in an oil bath at 140°C for 2 hours;

[0056] (2) Cool to room temperature after above-mentioned reaction is finished, carry out quantitative analysis to furfural and furfuryl alcohol with gas chromatograph. The result is as figure 1 and shown in Table 2.

[0057] Catalytic hydrogenation results under different reaction temperatures in table 2

[0058] temperature(℃) Conversion rate of furfural Furfuryl alcohol yield 60 44.3％ 37.0％ 80 62.5％ 56.8％ 100 78.6％ 73.5％ 120 98.2％ 95.4％ 140 99.8％ 91.3％ 160 100％ 85.0％

[0059] It can be seen that the increase in temperature is conducive to the improvement of catalytic activity, but the selectivity of furfuryl alcohol will decrease at an excessively high tempera...

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Abstract

The invention discloses a steviol zirconium catalyst for catalyzing furfural hydrogenation to prepare furfuryl alcohol and a preparation method of the steviol zirconium catalyst, and belongs to the technical field of heterogeneous catalysis. Stevia rebaudiana polyphenol and a zirconium source are mixed according to a specific ratio, and the steviol zirconium catalyst is prepared through a solvothermal method. The steviol zirconium catalyst obtained by the invention can have a good effect of catalyzing furfural hydrogenation with a low dosage under a relatively mild condition, is heterogeneous in a reaction system, is easy to separate and reuse, still maintains excellent catalytic performance after being reused for multiple times, and has a very good application prospect.

Description

technical field [0001] The invention relates to a zirconium steviol phenol catalyst used to catalyze the hydrogenation of furfural to prepare furfuryl alcohol and a preparation method thereof, belonging to the technical field of heterogeneous catalysis. Background technique [0002] With the rapid development of human society, the energy crisis and environmental problems are becoming more and more serious, and the traditional fossil resources are not renewable. In order to deal with these problems, it is urgent to find new renewable resources. Biomass is the only renewable carbon source on the earth. It has the advantages of wide distribution, large output and carbon balance, which has attracted the attention of many researchers. Biomass energy reserves are huge, and it has the potential to replace fossil energy in the energy structure. People have used biomass since ancient times, but the utilization efficiency of old processes is low. Therefore, it is of great significance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C07D307/44
CPCB01J31/2213C07D307/44B01J2531/48
Inventor 王海军刘晨
Owner JIANGNAN UNIV
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