Preparation method of hydrophobic hierarchical pore solid acid-alkali bifunctional catalyst

An acid-base bifunctional, multi-level pore technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., to achieve excellent catalytic effect, increase crosslinking degree, The effect of simple and quick separation

Inactive Publication Date: 2016-06-08
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In recent years, researchers have been exploring how to use C 6 A high yield of 5-hydroxymethylfurfural can be obtained from a unit of carbohydrates. At the same time, it is understood that the conversion of cellulose to 5-hydroxymethylfurfural requires a typical three-step process; that is, acid-catalyzed degradation of cellulose to glucose, and alkali-catalyzed glucose isomerization dehydration to fructose and fructose to 5-hydroxymethylfurfural in an acidic environment; therefore, researchers rationally designed and synthesized solid acid catalysts based on the three-step process from cellulose to 5-hydroxymethylfurfural to catalyze cellulose Preparation of 5-hydroxyfurfural; for example, Wu et al. successfully synthesized macroporous mesoporous silica nanoparticles with dual functions of acid and base, and used them as catalysts to catalyze the preparation of 5-hydroxymethylfurfural from cellulose in ionic liquids. T

Method used

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  • Preparation method of hydrophobic hierarchical pore solid acid-alkali bifunctional catalyst
  • Preparation method of hydrophobic hierarchical pore solid acid-alkali bifunctional catalyst
  • Preparation method of hydrophobic hierarchical pore solid acid-alkali bifunctional catalyst

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Embodiment 1

[0029] 1. A method for preparing a hydrophobic multi-level porous solid acid-base bifunctional catalyst, characterized in that it is carried out according to the following steps:

[0030] (1) Synthesis of basic functionalized hydrophobic nanoparticles

[0031] Mix 0.5 mL of glycidyl methacrylate (GMA) and 59 mL of H 2 O was added to a 250ml three-necked flask, filled with nitrogen for ten minutes, then 1.8mL of styrene (St) and 0.8mL of diethylbenzene (DVB) were added into it, then heated to 90°C, and 0.06g Potassium persulfate was stirred at 600~800rpm for 1-1.5 hours, and after high-speed centrifugation, it was dried in a vacuum oven at 40~50°C for 20~24 hours to obtain hydrophobic styrene epoxy particles (ie: S-GMA); Prepared 0.4g of hydrophobic styrene epoxy particles and 9.0mL of 22%~25% NH 3 ·H 2 O mixing, stirring at 90°C for 9-10 hours under reflux condensation, high-speed centrifugation, and drying in a vacuum oven at 40-50°C for 10-12 hours to obtain alkaline func...

Embodiment 2

[0046] 1. A method for preparing a hydrophobic multi-level porous solid acid-base bifunctional catalyst, characterized in that it is carried out according to the following steps:

[0047] (1) Synthesis of basic functionalized hydrophobic nanoparticles

[0048] According to the prior art, mix 0.6 mL of glycidyl methacrylate (GMA) and 60 mL of H 2 O was added to a 250ml three-neck flask, filled with nitrogen for ten minutes, then 2.0mL of styrene (St) and 1.0mL of diethylbenzene (DVB) were added into it, then heated to 90°C, and 0.08g Potassium persulfate was stirred at 600~800rpm for 1-1.5 hours, and after high-speed centrifugation, it was dried in a vacuum oven at 40~50°C for 20~24 hours to obtain hydrophobic styrene epoxy particles (ie: S-GMA); Prepared 0.5g of hydrophobic styrene epoxy particles and 10mL of NH with a concentration ratio of 22% to 25%. 3 ·H 2 O mixing, stirring at 90°C for 9-10 hours under reflux condensation, high-speed centrifugation, and drying in a vac...

Embodiment 3

[0056] 1. A method for preparing a hydrophobic multi-level porous solid acid-base bifunctional catalyst, characterized in that it is carried out according to the following steps:

[0057] (1) Synthesis of basic functionalized hydrophobic nanoparticles

[0058] Mix 0.55 mL of glycidyl methacrylate (GMA) and 58 mL of H 2 O was added to a 250ml three-neck flask, filled with nitrogen for ten minutes, then 1.9mL of styrene (St) and 0.9mL of diethylbenzene (DVB) were added into it, then heated to 90°C, and 0.07g Potassium persulfate was stirred at 600~800rpm for 1-1.5 hours, and after high-speed centrifugation, it was dried in a vacuum oven at 40~50°C for 20~24 hours to obtain hydrophobic styrene epoxy particles (ie: S-GMA); Prepared 0.45g of hydrophobic styrene epoxy particles and 9.5mL of 22%~25% NH 3 ·H 2 O mixing, stirring at 90°C for 9-10 hours under reflux condensation, high-speed centrifugation, and drying in a vacuum oven at 40-50°C for 10-12 hours to obtain alkaline func...

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Abstract

The invention relates to a preparation method of a hydrophobic hierarchical pore solid acid-alkali bifunctional catalyst, and belongs to the technical field of environment functional material preparation. According to the preparation method, alkali-functionalized hydrophobic nano particles (S-NH2) and span80 are taken as the emulsifier to prepare stable pickering high internal phase emulsion, wherein the water phase comprises deionized water and potassium sulfate, the oil phase comprises divinyl benzene, 1-hexene, trihydroxymethyl propane trimethyl acrylate (TMPTMA), and 2,2'-azodiisobutyronitrile (AIBN), then through emulsion polymerization and sulfonation, the hydrophobic hierarchical pore solid acid-alkali bifunctional catalyst (PAPCs) is obtained, and the catalytic effect of the catalyst can be observed in the one-step conversion of cellulose to prepare 5-hydroxymethyl furfural.

Description

technical field [0001] The invention relates to a method for preparing a hydrophobic multi-level porous solid acid-base bifunctional catalyst, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] As people are worried about the status quo of global warming and the reduction of non-renewable fossil material reserves year by year, the development of clean energy and renewable resources such as chemical raw materials has been paid more and more attention; the abundant renewable biomass energy mainly comes from plant Photosynthesis, and it can be used as an organic compound to produce energy and sustainable sources, so it has the potential to replace fossil fuels; in many applications, use cellulose or non-edible components in biomass to efficiently convert to produce high-addition The application of this aspect of value chemicals is of great significance; among them, the platform chemical 5-hydroxymethylfurfura...

Claims

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Application Information

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IPC IPC(8): B01J31/06C07D307/46
Inventor 潘建明高和平曾俊张云雷
Owner JIANGSU UNIV
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