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Method for preparing catalyst and 2,5-dimethylfuran for hydrogenolysis

A dimethylfuran and catalyst technology, which is applied in the field of hydrogenolysis catalysts and the preparation of 2,5-dimethylfuran, can solve the problems of reduced reaction efficiency, high cost of precious metals, and restrictions on practical applications, and achieve high catalytic activity Effect

Active Publication Date: 2016-05-25
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high cost of noble metals greatly restricts its practical application. Therefore, the development of non-noble metal catalyst systems is of great significance for the industrial production of 2,5-dimethylfuran. Although there are a small number of reports on non-noble metal catalyst systems, the catalyst cycle The effect is generally unsatisfactory. For example, the Heeres and Barta groups reported that Cu-PMO was used as a catalyst for hydrogenation to prepare 2,5-dimethylfuran. However, the reaction efficiency of the catalyst was significantly reduced in the fourth cycle, and the conversion rate of raw materials dropped to 60%

Method used

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  • Method for preparing catalyst and 2,5-dimethylfuran for hydrogenolysis
  • Method for preparing catalyst and 2,5-dimethylfuran for hydrogenolysis
  • Method for preparing catalyst and 2,5-dimethylfuran for hydrogenolysis

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preparation example Construction

[0023] The present invention has no special requirements for the preparation method of the catalyst, and those skilled in the art can select suitable raw materials to prepare according to the common knowledge in the field. The present invention is preferably prepared according to the following method:

[0024] Dissolve nickel nitrate, iron nitrate and lanthanum nitrate in deionized water, add citric acid and polyethylene glycol, stir vigorously for 12 hours, then place in an oil bath at 80°C until a foamy solid forms, then dry the foamy solid, Calcination and reduction to obtain a catalyst; wherein, the drying temperature is 100-130°C, and the drying time is preferably 20-30 minutes; the calcination temperature is preferably 700-800°C, and the calcination time is preferably 3 ~5 hours; the reduction conditions are preferably: hydrogen flow rate, 100ml / min, nitrogen flow rate, 20ml / min, temperature rise from room temperature 10°C / min to 500°C, keep for 4h, take it out after cool...

Embodiment 1

[0032] Catalyst preparation

[0033] Weigh 2.17mmol of nickel nitrate, 10mmol of iron nitrate, and 10mmol of lanthanum nitrate into a 100mL round-bottomed flask, and add deionized water until the solids are completely dissolved. Add 26.6 mmol of citric acid and 5.32 mmol of polyethylene glycol to the above nitrate solution. The resulting mixture was stirred vigorously for 12 h and placed in an oil bath at 80° C. until a foamy solid was formed. The foamy solid was dried in an oven at 120 °C for 24 h. Then transfer to muffle furnace for calcination at 750°C for 5h. After it is taken out, it is reduced in a reduction tube. The reduction conditions are as follows: hydrogen flow rate, 100ml / min, nitrogen flow rate, 20ml / min, temperature rises from room temperature 10°C / min to 500°C, retains for 4h, takes it out after cooling down to room temperature, and obtains Ni A perovskite-type oxide catalyst with a loading capacity of 5 wt%, marked as LF-N5;

[0034]Perovskite-type oxide ...

Embodiment 2

[0036] In a 25ml autoclave, add 1mmol 5-hydroxymethylfurfural, the catalyst prepared in 100mg Example 1 and 12ml reaction solvent ethanol, then seal the autoclave, fill it with hydrogen to 5MPa, and the heating program is from room temperature through 30min to 230 DEG C, keep 6h, use Shimadzu gas chromatograph (model GC2014, Wax chromatographic column) to carry out the quantitative analysis of raw material and product after the reaction finishes, analysis result sees Table 1, and Table 1 is the different Ni content that the embodiment 1 of the present invention provides Application data of the catalyst for the preparation of 2,5-dimethylfuran.

[0037] Table 1 The application data of the preparation of 2,5-dimethylfuran by catalysts with different Ni contents provided in Example 1 of the present invention

[0038] catalyst

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Abstract

The invention provides a method for preparing a catalyst and 2,5-dimethylfuran for hydrogenolysis. The catalyst for hydrogenolysis is composed of a perovskite oxide carrier LaFeO3 and Ni loaded on the carrier. The catalyst is applied to preparing 2,5-dimethylfuran, the conversion rate of a biomass derivative containing a furan ring reaches 99% or above, and the yield of 2,5-dimethylfuran is high. Besides, the activity of the catalyst recycled after reaction is still high.

Description

technical field [0001] The invention relates to the technical field of bioenergy, in particular to a catalyst for hydrogenolysis and a preparation method of 2,5-dimethylfuran. Background technique [0002] With the increasing depletion of non-renewable fossil resources, the development of sustainable resources for the production of transportation fuels and chemicals has become a current research hotspot. Compared with the alternative energy chemicals bioethanol and biobutanol that have been intensively studied at present, biomass has the characteristics of wide distribution, abundant distribution, cheap and renewable, so, biomass-derived compounds are considered to be ideal for replacing fossil resources. substitute. [0003] Biomass can be transformed into a series of furan compounds such as 5-hydroxymethylfurfural, 2,5-furandimethanol, 5-methylfuranaldehyde, 5-methyl-2-furanmethanol, etc. through acid-catalyzed degradation, but Such compounds have high oxygen content and...

Claims

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Application Information

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IPC IPC(8): B01J23/83C07D307/36
CPCY02P20/584B01J23/83C07D307/36
Inventor 傅尧陈蒙远陈楚白巴哈特闫鹏飞严龙
Owner UNIV OF SCI & TECH OF CHINA
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