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Preparation method and catalysis application of acidic-basic functionalized mesoporous material by using solid-state ionic migration method

A mesoporous material and ion migration technology, which is applied in molecular sieve catalysts, organic carbonate preparation, physical/chemical process catalysts, etc., can solve the problems of difficult to meet raw material requirements and relatively high raw material requirements, and achieve good hydrothermal stability, The preparation process is simple and the effect of excellent performance

Inactive Publication Date: 2011-06-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction catalyst is not easily deactivated, but the requirements for raw materials are relatively high, and the total weight of salt in the raw materials is required to be less than 10×10 -6 , the content of inorganic salt is 1×10 -6 Below, such raw material requirements are difficult to meet

Method used

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  • Preparation method and catalysis application of acidic-basic functionalized mesoporous material by using solid-state ionic migration method
  • Preparation method and catalysis application of acidic-basic functionalized mesoporous material by using solid-state ionic migration method
  • Preparation method and catalysis application of acidic-basic functionalized mesoporous material by using solid-state ionic migration method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 2.0 grams of triblock copolymer surfactant polyoxyethylene-polyoxypropylene-polyoxyethylene EO 20 -PO 70 -EO 20 (P123) was dissolved in 60.2g of 2M hydrochloric acid and 15mL of deionized water, and stirred evenly until a transparent solution was formed. The solution was placed in a water bath at 40°C, and then 4.25 grams of tetraethyl orthosilicate was slowly added dropwise to the surface active solution, stirred at 40°C for 20 hours, and then hydrothermally treated at 80°C for 24 hours. Finally, after filtering, washing with deionized water, and drying at room temperature, the mesoporous material SBA-15 was prepared for future use.

[0033] Take 0.36g precursor Mg(NO 3 ) 2 ·6H 2 O and 0.52g precursor Al(NO 3 ) 3 9H 2 O was mixed with 1.0 g of the above-prepared SBA-15 mesoporous material matrix (i.e. the molar ratio of Si:Mg and Si:Al was 12), mechanically ground for 30 min, and then heated at a rate of 1 °C / min in a roasting furnace. The room temperature was...

Embodiment 2

[0035] The preparation method is the same as in Example 1, only changing the amount of the precursor, that is, getting 0.71g of the precursor Mg(NO 3 ) 2 ·6H 2 O and 1.04g precursor Al(NO 3 ) 3 9H 2 O was mixed with 1.0 g of the SBA-15 mesoporous material precursor prepared in Example 1 (Si: Mg and Si: Al molar ratio was 6), mechanically ground for 30 min, and then heated at a rate of 1 °C / min in a roasting furnace , from room temperature to 500°C, and calcined for 6 hours to obtain an acid-base functionalized mesoporous material.

Embodiment 3

[0037] The preparation method is the same as in Example 1, only changing the amount of the precursor, i.e. getting 1.07g of the precursor Mg(NO 3 ) 2 ·6H 2 O and 1.56g precursor Al(NO 3 ) 3 9H 2 O was mixed with 1.0 g of the SBA-15 mesoporous material precursor prepared in Example 1 (Si: Mg and Si: Al molar ratio was 4), mechanically ground for 30 min, and then heated at a rate of 1 °C / min in a roasting furnace , from room temperature to 500°C, and calcined for 6 hours to obtain an acid-base functionalized mesoporous material.

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Abstract

The invention relates to a preparation method and catalysis application of an acidic-basic functionalized mesoporous material by using a solid-state ionic migration method. The preparation method comprises the steps of: with a mixture of Mg(NO3)2.6H2O and Al(NO3)3.9H2O, or a mixture of Mg(NO3)2.6H2O and AlCl3.6H2O, or a mixture of Mg(OH)2 and Al(OH)3, or a mixture of Mg(CH3COO)2.4H2O and Zn(NO3)2.6H2O, or a mixture of Mg(CH3COO)2.4H2O and ZnSO4.7H2O as a precursor, mixing with a mesoporous material SBA-15 prepared by using a thermal synthesis method, grinding, and calcining to prepare the acidic-basic functionalized mesoporous material, wherein the acidic-basic functionalized mesoporous material is used as a catalyst in the esterification reaction of synthesizing ethyl methyl carbonate. The invention has the advantages of simple preparation process, no need of any solvent, ordered structure and uniform distribution of holes, large specific surface area, and good thermal stability and hydrothermal stability, and realizes the function of acid-base concerted catalysis.

Description

technical field [0001] The invention relates to the preparation and catalytic application of an acid-base functionalized mesoporous material by a solid-state ion migration method, which belongs to the mesoporous material modification technology. Background technique [0002] The mesoporous material SBA-15 has a regular pore structure of two-dimensional hexagonal phase, with its large pore diameter range (5-30nm) and high specific surface area (800-1000m 2 / g), excellent hydrothermal stability and thermal stability have attracted much attention. Due to the lack of active centers, weak acidity and low catalytic activity, its practical application is greatly limited. In order to realize the potential application value of SBA-15, relying on chemical modification to improve its hydrothermal stability and catalytic activity has become the main research topic now. [0003] The process of introducing metal ions through chemically modified molecular sieves is usually achieved by on...

Claims

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Application Information

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IPC IPC(8): B01J29/03C07C69/96C07C68/06
Inventor 韩金玉陈英王华张文娟常贺英
Owner TIANJIN UNIV
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