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Catalyst used for preparing 2,5-methyl furan and preparation method thereof

A technology of dimethylfuran and copper-based catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve problems such as high production costs, achieve easy operation and reduce production costs , The effect of simple preparation method

Inactive Publication Date: 2016-03-30
SYNFUELS CHINA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, in the article (ChemSusChem[J].2014,7,1068.) and the patent publication CN103554066A, Fu Yao et al. used a Ni-based catalyst to catalyze the hydrogenation of 5-hydroxymethylfurfural at 180°C, although the catalyst can 2,5-dimethylfuran can be obtained with high selectivity, but the active component of the catalyst also includes tungsten carbide, which also has high production costs

Method used

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  • Catalyst used for preparing 2,5-methyl furan and preparation method thereof
  • Catalyst used for preparing 2,5-methyl furan and preparation method thereof
  • Catalyst used for preparing 2,5-methyl furan and preparation method thereof

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Effect test

Embodiment 1

[0040] CuZnAl catalyst was prepared with hydrotalcite as precursor to catalyze the preparation of 2,5-dimethylfuran from 5-hydroxymethylfurfural.

[0041] Preparation of CuZnAl catalyst: configure Cu(NO 3 ) 2 ·6H 2 O, Zn(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 2 9H 2 O mixed solution, in which the molar ratio Cu:Zn:Al=1:1:1, configure Na 2 CO 3 A mixed solution of NaOH and NaOH is co-precipitated under water bath conditions, the pH is maintained at 9-10, aged at 65°C for 150min, filtered, washed, and dried to obtain a hydrotalcite precursor, such as figure 2 as shown in a. Then the obtained hydrotalcite precursor is calcined at 350° C. for 4 h, and the intermediate product obtained is a highly dispersed Cu-based catalyst prepared from hydrotalcite as the precursor, such as figure 2 as shown in b. 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 o...

Embodiment 2

[0045]CuZn catalyst was prepared from green copper zinc ore as precursor to catalyze the synthesis of 2,5-dimethylfuran from 5-hydroxymethylfurfural.

[0046] Preparation of CuZn catalyst: weigh a certain amount of Cu(NO 3 ) 2 ·6H 2 O, Zn(NO 3 ) 2 ·6H 2 O was dissolved in deionized water, in which the molar ratio Cu:Zn=1:1, and a certain amount of Na was weighed 2 CO 3 Dissolve in deionized water, carry out co-precipitation under water bath conditions, maintain the pH at 6-7, age at 65°C for 150 minutes, filter, wash, and dry to obtain the green copper zinc ore precursor, such as image 3 as shown in a. Then the obtained precursor was calcined at 350°C for 4h, and the obtained intermediate product was a highly dispersed Cu-based catalyst prepared by the precursor, such as image 3 as shown in b. 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 tempera...

Embodiment 3

[0050] CuZn catalyst was prepared by using the mixed phase of copper-zinc malachite and green copper-zincite as precursor to catalyze the synthesis of 2,5-dimethylfuran from 5-hydroxymethylfurfural.

[0051] Preparation of CuZn catalyst: weigh a certain amount of Cu(NO 3 ) 2 ·6H 2 O, Zn(NO 3 ) 2 ·6H 2 O was dissolved in deionized water, in which the molar ratio Cu:Zn=2:1, weighed a certain amount of Na 2 CO 3 Dissolve in deionized water, carry out co-precipitation under water bath conditions, maintain pH at 6-7, age at 65°C for 150 minutes, filter, wash, and dry to obtain a mixed-phase precursor of copper-zinc malachite and green copper-zinc ore, such as Figure 4 as shown in a. Then the obtained precursor is calcined at 350 ° C for 4 h, and the obtained intermediate product is a highly dispersed Cu-based catalyst prepared by the mixed phase as the precursor, such as Figure 4 as shown in b. Then reduce the intermediate product in a hydrogen atmosphere, the flow rate ...

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Abstract

The invention discloses a catalyst used for preparing 2,5-methyl furan and a preparation method thereof. A copper-based catalyst is composed of a copper element and a metal element M, wherein the metal element M is selected from at least one of zinc element and aluminum element and the mole ratio of copper element to metal element M is (1-4):1. According to the invention, a coprecipitation method is used for preparing a copper-based mineral salt precursor; after the copper-based mineral salt precursor is roasted, the high-dispersion copper-based catalyst is acquired, with higher 5-hydroxymethyl furfural conversion rate (99%) and 2,5-methyl furan selectivity (85%). Besides, the raw materials required by the preparation for the copper-based catalyst are easily acquired; the preparation method is simple; the operation is convenient; the cost is low; the catalyst has potential economic benefit.

Description

technical field [0001] The invention belongs to the field of catalysts, and relates to a catalyst for preparing 2,5-dimethylfuran and a preparation method thereof. Background technique [0002] 5-Hydroxymethylfurfural, derived from abundant C6 sugars, is an important platform compound that can be hydrogenated to give 2,5-dimethylfuran, 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.). [0003] At present, the catalysts for preparing 2,5-dimethylfuran include CuRu / C, Pd / C, Ru / Co 3 o 4 , Ru / C, PtCoHCS, etc. The use of noble metals makes the production cost of 2,5-dimethylfuran higher. In recent years, in the article (ChemSusChem[J].2014,7,1068.) and the patent publication CN103554066A, Fu Yao et al. used a Ni-based catalyst to catalyze the hydrogenation of 5-hydroxymethylfurfural at 180°C, althoug...

Claims

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Application Information

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IPC IPC(8): B01J23/80C07D307/36
CPCB01J23/002B01J23/80B01J2523/00C07D307/36B01J2523/17B01J2523/27B01J2523/31
Inventor 朱义峰孔晓朱玉雷孙思凯杨勇李永旺
Owner SYNFUELS CHINA TECH CO LTD
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