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Nickel-based catalyst and its preparation method and use in 5-hydroxymethylfurfural hydrogenation

A nickel-based catalyst, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as restricting development, and achieve easy operation and preparation methods. Simple, highly active and selective effect

Active Publication Date: 2016-02-03
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although catalytic hydrogenation of 5-hydroxymethylfurfural can generate 2,5-dimethylfuran and 2,5-dimethyltetrahydrofuran with high selectivity, most of these reactions require noble metal catalysts
Especially for the biomass route to 2,5-dimethyltetrahydrofuran, a homogeneous noble catalyst (RhCl 3 ) usage limits its further development

Method used

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  • Nickel-based catalyst and its preparation method and use in 5-hydroxymethylfurfural hydrogenation
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  • Nickel-based catalyst and its preparation method and use in 5-hydroxymethylfurfural hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1. Using hydrotalcite as a precursor to prepare NiAl(3:1) catalyst to catalyze the production of 2,5-dimethylfuran from 5-hydroxymethylfurfural

[0042] Preparation of NiAl(3:1) catalyst: weigh 109.0gNi(NO 3 ) 2 ·6H 2 O and 46.89gAl(NO 3 ) 3 9H 2 O is completely dissolved in 500ml of water; weigh 26.5gNa 2 CO 3and 70g NaOH were completely dissolved in 1L of water; the two mixtures were slowly added dropwise to 200ml mother liquor at the same time, vigorously stirred, and the pH was maintained at 10. After the addition, the obtained colloidal suspension was aged at 63°C for 18h; Washing with ionized water, drying, and roasting at 850°C for 4 hours, the intermediate product obtained is a highly dispersed NiAl (3:1) catalyst prepared from hydrotalcite as a precursor, and then the intermediate product is reduced in a hydrogen atmosphere, and the flow rate of hydrogen is 140ml / min, the heating rate from room temperature to the reduction reaction temperature o...

Embodiment 2

[0053] Example 2. Using hydrotalcite as a precursor to prepare a NiAl (3:1) catalyst to catalyze the production of 2,5-dimethyltetrahydrofuran from 5-hydroxymethylfurfural.

[0054] The preparation of NiAl (3:1) catalyst is the same as embodiment 1.

[0055] The experimental conditions are: the mass ratio of catalyst and raw material is 1:15, the reaction temperature is 180°C, the reaction pressure is 1.5MPa, and the reaction time is 20h. The product was analyzed by gas chromatography, the detector was FID, and the chromatographic column was J&WDB-WAX. The conversion rate and product selectivity were analyzed by the corrected area normalization method. The conversion rate of 5-hydroxymethylfurfural was about 100%, and the selectivity of 2,5-dimethyltetrahydrofuran furan was 97.4%, as shown in Table 1. Gas chromatographic results of the product after the reaction, such as Figure 4 .

[0056] Example 1 and Example 2 use the same catalyst NiAl (3:1), realize the selective mod...

Embodiment 3

[0060] Example 3. Using hydrotalcite as a precursor to prepare a NiAl (2:1) catalyst to catalyze the production of 2,5-dimethyltetrahydrofuran from 5-hydroxymethylfurfural.

[0061] Preparation of NiAl(2:1) catalyst: weigh 96.9gNi(NO 3 ) 2 ·6H 2 O and 62.52gAl(NO 3 ) 3 9H 2 O is completely dissolved in 500ml of water; weigh 26.5gNa 2 CO 3 and 70g NaOH were completely dissolved in 1L of water; the two mixtures were slowly added dropwise to 200ml mother liquor at the same time, vigorously stirred, and the pH was maintained at 10. After the addition, the obtained colloidal suspension was aged at 63°C for 18h; Washing with ion water, drying, and calcination at 600°C for 4 hours, the intermediate product is a highly dispersed NiAl(2:1) catalyst prepared with hydrotalcite as the precursor. Then reduce the intermediate product in a hydrogen atmosphere, the flow rate of hydrogen is 140ml / min, the heating rate from room temperature to the reduction reaction temperature of 250°C ...

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Abstract

The invention discloses a nickel-based catalyst and its preparation method and use in 5-hydroxymethylfurfural hydrogenation. The nickel-based catalyst has a general formula of NiAl or NiMAl, wherein M represents a metallic element selected from Zn, Mg and Mn, in NiAl, a mole ratio of Ni to Al is 1-3: 1, and in NiMAl, a mole ratio of Ni, M to Al is 1: 1: 1. Ni-based hydrotalcite as a precursor is roasted to form a high-dispersibility Ni-based catalyst with a high 5-hydroxymethylfurfural conversion rate (greater than 99%) and high 2, 5-dimethylfuran or 2, 5-dimethyltetrahydrofuran selectivity (greater than 95%). The nickel-based catalyst has the advantages of easily available raw materials, simple preparation method, operation convenience, low cost, repeatable utilization and latent economic benefits.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a nickel-based catalyst, a preparation method thereof and an application in catalyzing the hydrogenation of 5-hydroxymethylfurfural. Background technique [0002] 5-Hydroxymethylfurfural, derived from abundant C6 sugars, is an important platform compound that can be hydrogenated to 2,5-dimethylfuran or 2,5-dimethyltetrahydrofuran, such as figure 1 shown. The energy density of 2,5-dimethylfuran is 30MJ / L, the boiling point is 92-94°C, and the octane number is 119. Compared with ethanol, it is a more promising fuel substitute (Nature[J] .2007, 447, 982.). 2,5-Dimethyltetrahydrofuran has similar properties to 2,5-dimethylfuran, with an energy density of 31.8MJ / L and a boiling point of 90-92°C. It can also be used as a fuel additive, and it is also an important organic solvent (J .Phys.Chem.A[J].2012,116,4528.). [0003] At present, the biomass pathway of 2,5-dimethylfuran is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/80B01J23/889C07D307/36C07D307/06
Inventor 孔晓朱义峰朱玉雷孙思凯杨勇李永旺
Owner SYNFUELS CHINA TECH CO LTD
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