Metal-solid acid double-center catalyst and application thereof in catalyzing dehydration-hydrogenation of xylose to prepare furfuryl alcohol

A dual-center, solid acid technology, used in physical/chemical process catalysts, organic chemistry, chemical recycling, etc., can solve the problems of high raw material cost, limited large-scale development, low catalytic activity, etc., to improve safety and economy. The effect of simple reaction process is to realize recycling and utilization.

Inactive Publication Date: 2020-04-24
太原科元发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalytic system has high active metal loading, low catalytic activity, harsh reaction conditions (high temperature, high pressure)), and poor stability of the catalyst in the liquid phase system, which limits its large-scale application.
Chinese patent CN104841436A publicly reported that metal nano-Cu is dispersed and anchored on the MgO carrier, and a Cu/MgO catalyst is prepared for the hydrogenation of furfural to prepare furfuryl alcohol. o C, under one atmospheric pressure, the conversion rate of furfural is 90%~99%, and the selectivity of furfuryl alcohol is 90%~99%, but the specific surface area of ​​the catalyst carrier is small, and the dispersion and stability of the active metal Cu are poor, which limits its large scale development
Chinese patent CN106732706 discloses a copper-based catalyst with rare earth elements as additives and copper oxide (28wt%~75wt%) as acti

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1:

[0034] 1. Preparation of sulfonated graphene solid acid catalyst

[0035] 1) Synthesis of p-aminobenzenesulfonic acid diazonium salt: Add 3 ml of NaOH (0.02 g / ml) and 1g p-aminobenzenesulfonic acid in a 100 ml beaker, and fully dissolve p-aminobenzenesulfonic acid under heating in a water bath . At room temperature, add 0.2 g NaNO to the above solution 2 , Wait for NaNO 2 After it is completely dissolved, add 4 ml ice water and 1 ml concentrated HCl to the beaker and stir constantly. At this time, the temperature of the beaker was controlled at 0°C and kept for 20 minutes.

[0036] 2) Preparation of sulfonated graphene solid acid: Disperse 40 ml (6.5 mg / ml) GO solution ultrasonically for 30 minutes, then add the diazonium p-sulfanilic acid solution dropwise to the beaker containing GO, and The mixed solution was continuously stirred for 8 hours under ice bath conditions. Centrifuge and wash the product several times to obtain GO-SO 3 H, is the crude product of...

Example Embodiment

[0041] Example 2

[0042] 1. Preparation of sulfonated graphene solid acid catalyst

[0043] 1) Synthesis of p-aminobenzenesulfonic acid diazonium salt: add 1 ml NaOH (0.02g / ml) and 0.5 g p-aminobenzene sulfonic acid in a 100 ml beaker, and heat the p-aminobenzene sulfonic acid fully in a water bath. Dissolve. At room temperature, add 0.05g NaNO to the above solution 2 , Wait for NaNO 2 After dissolving completely, add 2.5 ml ice water and 0.5 ml concentrated HCl to the beaker with constant stirring. At this time, the temperature of the beaker was controlled at 0°C and kept for 20 minutes.

[0044] 2) Preparation of sulfonated graphene solid acid: Disperse 45 ml (6.5 mg / ml) GO solution ultrasonically for 30 minutes, then add the diazonium p-sulfanilic acid solution dropwise to the beaker containing GO, and The mixed solution was continuously stirred for 6 hours under ice bath conditions. Centrifuge and wash the product several times to obtain GO-SO 3 H, is the crude product of SG...

Example Embodiment

[0049] Example 3

[0050] 1. Preparation of sulfonated graphene solid acid catalyst

[0051] 1) Synthesis of p-aminobenzenesulfonic acid diazonium salt: add 4 ml NaOH (0.02 g / ml) and 2 g p-aminobenzenesulfonic acid in a 100 ml beaker, and heat the p-aminobenzenesulfonic acid under the condition of heating in a water bath. Dissolve. At room temperature, add 0.2 g NaNO to the above solution 2 , Wait for NaNO 2 After it is completely dissolved, add 5 ml ice water and 2 ml concentrated HCl to the beaker with constant stirring. At this time, the temperature of the beaker was controlled at 0°C and kept for 20 minutes.

[0052] 2) Preparation of sulfonated graphene solid acid: Disperse 61.6 ml (6.5 mg / ml) GO solution ultrasonically for 30 minutes, then add the diazonium p-aminobenzenesulfonate solution dropwise to the beaker containing GO, and The mixed solution was continuously stirred for 8 hours under ice bath conditions. Centrifuge and wash the product several times to obtain GO-SO ...

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PUM

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Abstract

The invention discloses a metal-solid acid double-center catalyst and an application thereof in catalyzing dehydration-hydrogenation of xylose to prepare furfuryl alcohol. The catalyst comprises an acid center and a metal center, the acid center is sulfonated and modified graphene with a two-dimensional planar structure, and the metal center is metal Ru with higher C=O-based hydrogenation activity. The loading capacity of the metal in the catalyst is 0.5 wt%-5wt%, and the mass percent of the sulfonated graphene is 95%-99.5%. The used metal-solid acid double-center catalyst shows excellent catalytic performance in catalyzing xylose to directly prepare furfuryl alcohol through a dehydration-hydrogenation one-step method; effective coupling of acid catalysis and hydrogenation reaction is realized, the economy and safety of the method are improved, the reaction is simple, the catalyst can be recycled, and the method has potential industrial application value.

Description

technical field [0001] The invention relates to a metal-solid acid double-center catalyst and its application in catalyzing the dehydration-hydrogenation of xylose to prepare furfuryl alcohol, which belongs to the technical field of catalyst preparation and application, and specifically relates to a method of using a high-efficiency metal-solid acid catalyst to catalyze xylose A method for directly preparing furfuryl alcohol through dehydration-hydrogenation reaction. Background technique [0002] Furfuryl alcohol is an important strategic chemical raw material and an important intermediate for the synthesis of polyester, furan resin, rocket fuel, fiber, spices, vitamin C and medicine. With the development of the national economy, the demand for furfuryl alcohol is large, and the current growth rate is 30% to 50%, and the price is expensive. Therefore, it is of great research significance and economic value to efficiently convert biomass to produce high value-added chemical...

Claims

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Application Information

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IPC IPC(8): B01J27/02C07D307/44
CPCB01J27/02C07D307/44Y02P20/584
Inventor 谭静静崔静磊赵永祥
Owner 太原科元发展有限公司
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