Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of porous zinc aluminate gahnite block

A zinc-aluminum and spinel technology is applied in the field of preparation of porous zinc-aluminum spinel blocks, and achieves the effects of simple process, controllable pore size and low-cost equipment.

Active Publication Date: 2017-05-17
ZHEJIANG UNIV
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the preparation of porous blocks of one-component systems, scholars at home and abroad have established a relatively complete theoretical system, but there are few preparations for porous blocks of two-component or three-component systems.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of porous zinc aluminate gahnite block
  • Preparation method of porous zinc aluminate gahnite block
  • Preparation method of porous zinc aluminate gahnite block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1, a kind of preparation method of porous zinc-aluminum spinel block, configure main raw material according to following ratio earlier: with the anhydrous zinc chloride (ZnCl) of 0.68g (0.005mol) 2 ) as the zinc source, with 2.4g (0.01mol) of aluminum chloride hexahydrate (AlCl 3 ·6H 2 O) is aluminum source, with 0.14g polyethylene oxide (PEO, average molecular weight is 1,000,000) as phase separation inducer, with the propylene oxide (PO, namely 1,2-propylene oxide) of 3.4ml as gel accelerator ;then follow these steps in order:

[0030] 1) At room temperature, first dissolve 0.68g of anhydrous zinc chloride, 2.4g of aluminum chloride hexahydrate and 0.14g of polyethylene oxide in a solvent composed of 3ml of deionized water and 2ml of absolute ethanol. Stir the reaction at 25°C for 60 minutes to obtain a transparent and clear solution;

[0031] 2), add propylene oxide to the transparent and clear solution obtained in step 1) and stir evenly for 3 minutes ...

Embodiment 2

[0039] Example 2. A method for preparing a porous zinc-aluminum spinel block. The heat treatment temperature in step 5) of Example 1 is changed from 600°C to 700°C, and the rest is the same as Example 1.

[0040] The prepared porous zinc-aluminum spinel block remains intact and has a small amount of shrinkage, but its co-continuous pore structure is not destroyed, and the obtained zinc-aluminum spinel is a pure phase. Its porosity is 73.5%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a porous zinc aluminate gahite block. The preparation method comprises the following steps: (1) firstly dissolving anhydrous zinc chloride, aluminum chloride hexahydrate and polyoxyethylene in a solvent under room temperature, and stirring and reacting for 40 to 70 minutes under 20 to 40 DEG C, thus obtaining a transparent clear solution; (2) adding epoxy propane in the transparent clear solution obtained in step (1) and uniformly stirring for 1 to 3 minutes, thus obtaining a homogeneous solution; (3) after sealing the homogeneous solution obtained in step (2) in a container, gelating for 8 to 10 minutes under 35 to 45 DEG C, thus obtaining wet gel; (4) aging the wet gel obtained in step (3) for 50 to 80 hours under 35 to 45 DEG C; (5) drying the aged gel obtained in step (4) for 48 to 72 hours under 50 to 70 DEG C and normal pressure; then carrying out thermal treatment for 4 to 6 hours under 600 to 900 DEG C, thus obtaining the porous zinc aluminate gahite block.

Description

technical field [0001] The invention relates to a method for preparing a porous zinc-aluminum spinel block, in particular to a preparation method for preparing a porous zinc-aluminum spinel block by an epoxy-controlled sol-gel accompanied by phase separation. Background technique [0002] Zinc-aluminum spinel is a typical wide-bandgap material. The optical bandgap of polycrystalline zinc-aluminum spinel is 3.8eV, which determines that zinc-aluminum spinel has good transparency to visible light with a wavelength greater than 320nm; and Like magnesium aluminum spinel, zinc aluminum spinel has high melting point, low coefficient of thermal expansion, and high thermal stability. It has been applied in industry to a certain extent. [0003] Porous zinc-aluminum spinel with controllable pore structure has received extensive attention in the field of catalysis, for example, it is used as a dehydration catalyst for olefins in the petrochemical industry, and cracking desulfurization...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B38/00C04B35/10C04B35/624
Inventor 郭兴忠尹朋岸雷伟杨辉
Owner ZHEJIANG UNIV