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Preparation method of nanometer sodalite powder

A technology of stone powder and nanometer, which is applied in the field of preparation of nanosodalite powder, to achieve the effect of improving efficiency, narrow particle size distribution and large specific surface area

Inactive Publication Date: 2012-07-11
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been many reports about microwave synthesis of molecular sieves, but the report of microwave-assisted synthesis of sodalite has not yet appeared.

Method used

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  • Preparation method of nanometer sodalite powder
  • Preparation method of nanometer sodalite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Weigh 1.42g Na 2 SiO 3 9H 2 O, 0.32g NaOH and 0.784g KOH are added in the beaker, then add 8.5g deionized water, and heat to make the raw materials dissolve rapidly and completely, and make solution A;

[0041] (2) Weigh 0.3g NaAlO 2 Add it to another beaker, then add 10g of deionized water, and heat to dissolve the raw materials quickly and completely to make solution B;

[0042] (3) Slowly add solution A to solution B, and stir rapidly to make it mix evenly to form a silica-alumina gel;

[0043] (4) Add 22.5 g of ionic liquid to the prepared silica-alumina gel, and then stir for 1 to 4 hours to form a crystallization precursor;

[0044] (5) Put the beaker containing the above-mentioned crystallization precursor solution into a microwave reactor, set the temperature to 70°C, the stirring speed to 600r / min and the reaction time to 90 minutes, and then start to crystallize;

[0045] (6) After the reaction is completed, take out the beaker, cool the reactant, and p...

Embodiment 2

[0047] (1) Weigh 3.2gNa 2 SiO 3 9H 2 Add O, 0.32NaOH and 0.784KOH into the beaker, then add 10g of deionized water, and heat to dissolve the raw materials quickly and completely to make solution A;

[0048] (2) Weigh 0.9g NaAlO 2 Add it to another beaker, add 11g of deionized water, and heat to dissolve the raw materials quickly and completely to make solution B;

[0049] (3) Slowly add solution A to solution B, and stir rapidly to make it mix evenly to form a silica gel;

[0050] (4) Add 32.5 g of ionic liquid to the prepared silica-alumina gel, and then stir for 1 to 4 hours to form a crystallization precursor;

[0051] (5) Put the beaker containing the above-mentioned crystallization precursor liquid into a microwave reactor, set the temperature at 60°C, the stirring speed at 700r / min and the reaction time for 105 minutes, and then start crystallization;

[0052] (6) After the reaction is completed, take out the beaker, cool the reactant, and perform suction filtration...

Embodiment 3

[0054] (1) Weigh 5.5gNa 2 SiO 3 9H 2 Add O, 0.32NaOH and 0.784KOH into the beaker, then add 14g of deionized water, and heat to dissolve the raw materials quickly and completely to make solution A;

[0055] (2) Weigh 1.9g NaAlO 2 Add it to another beaker, then add 14g deionized water, and heat to dissolve the raw materials quickly and completely to make solution B;

[0056] (3) Slowly add solution A to solution B, and stir rapidly to make it mix evenly to form a silica gel;

[0057] (4) Add 46.5 g of ionic liquid to the prepared silica-alumina gel, and then stir for 1 to 4 hours to form a crystallization precursor;

[0058] (5) Put the beaker containing the above-mentioned crystallization precursor solution into a microwave reactor, set the temperature to 90°C, the stirring speed to 400r / min and the reaction time to 60 minutes, and then start to crystallize;

[0059] (6) After the reaction is completed, take out the beaker, cool the reactant, and perform suction filtratio...

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Abstract

The invention discloses a preparation method of nanometer sodalite powder. A synthetic method is characterized by comprising the following steps of: proportionally mixing NaAlO2, Na2SiO3.9H2O, NaOH, KOH and deionized water into silicon-aluminum sol in a beaker, adding an ionic liquid, i.e., [emim]Bar, stirring uniformly, putting into a microwave reactor, performing magnetic stirring, performing microwave heating, and crystalizing; cooling to the room temperature after crystalizing, taking a crystallization product out, separating and leaching by using a centrifuge, and leaching with deionized water and acetone; and drying a product to obtain sodalite powder. In the synthetic method disclosed by the invention, microwaves are used for heating, so that the crystalizing time is shortened greatly, and a crystal synthesized under the condition that the using amount of the ionic liquid is small has the characteristics of high degree of crystallinity, small particle diameter and narrow particle diameter distribution. According to these characteristics, sodalite has higher application values on the aspects of adsorption and hydrogen storage.

Description

technical field [0001] The invention belongs to the technical field of nano zeolite preparation. Specifically relates to a preparation method of nano sodalite powder used for adsorption and hydrogen storage materials. Background technique [0002] Sodalite is the first zeolite to enter the world of inorganic materials. Its crystal structure is a body-centered cubic arrangement of SOD cages connected by a single four- and six-membered ring. [1] . Sodalite can be used not only as a photochromic material, but also as an adsorbent and hydrogen storage material [2][3] , so it has a good prospect of industrial application. [0003] The most commonly used method for synthesizing sodalite is the hydrothermal method [4] and solvothermal [5，6] . Since the crystallization of these two methods is carried out in a closed reactor, it is necessary to overcome the higher autogenous pressure. In 2006, Ma Yingchong [7] et al. synthesized sodalite in an open system at atmospheric press...

Claims

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Application Information

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IPC IPC(8): C01B33/32B82Y40/00
Inventor 邵国林魏立纲高学名臧丽君
Owner DALIAN POLYTECHNIC UNIVERSITY
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