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Hydrotalcite-like composite material and preparation method thereof

A composite material, hydrotalcite technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of complex process and high cost, and achieve the effect of firm bonding, simple manufacturing process and good stability

Active Publication Date: 2019-08-06
ZHAOQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hydrotalcite-like composite material and a preparation method thereof for overcoming the problems of complicated process and high cost for preparing hydrotalcite-like composite materials in the prior art

Method used

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preparation example Construction

[0039] The preparation method of the hydrotalcite-like composite material of the first aspect embodiment of the present invention comprises the following steps:

[0040] Step 1: Mix A-type zeolite, silane coupling agent and water, and mix and stir at a temperature of 30-80° C. to obtain a first slurry.

[0041] Wherein, the ratio of the A-type zeolite to water is: 100g A-type zeolite: 500-1500mL water, and the dosage of the silane coupling agent is 0.5%-10% of the A-type zeolite mass.

[0042] As preferably, A-type zeolite, silane coupling agent and water are mixed, and the proportioning of the three is:

[0043] Type A zeolite: water: silane coupling agent is 100g: 750mL: 5g.

[0044] Preferably, after mixing the A-type zeolite, the silane coupling agent and water, the mixed slurry is stirred at a temperature of 60°C.

[0045] Among them, mixing and stirring for 60 minutes at a temperature of 30-80° C. is more appropriate.

[0046] Type A zeolite is cheap, has a regular pore...

Embodiment 1

[0064] Step 1: Mix 200g of 4A zeolite, 10.0g of γ-(methacryloyloxy)propyltrimethoxysilane, and 1500mL of water, and stir at reflux at 60°C for 60min to obtain the first slurry;

[0065] Step 2: Add 215.02g of magnesium nitrate hexahydrate and 157.29g of aluminum nitrate nonahydrate to the first slurry, stir for 0.5h, and stir evenly to obtain the second slurry;

[0066] Step 3: Add 22.22 g of anhydrous sodium carbonate to the second slurry and stir evenly, then add sodium hydroxide, adjust the pH to 13.0 and stir evenly to obtain the third slurry;

[0067] Step 4: crystallize the obtained third slurry at 135° C. for 12 hours, then cool and filter, wash, dry and pulverize the filter cake to obtain the magnesium aluminum hydrotalcite / 4A zeolite composite material.

[0068] The magnesium aluminum hydrotalcite / 4A zeolite composite material prepared in Example 1 has good dispersion properties, and has the advantages of low cost, mild preparation conditions, and simple process.

Embodiment 2

[0070] Step 1: Mix 200g of 4A zeolite, 1g of n-octyltriethoxysilane, and 1000mL of water, and stir at reflux at 30°C for 5min to obtain the first slurry;

[0071] Step 2: Add 215.02g of magnesium nitrate hexahydrate and 157.29g of aluminum nitrate nonahydrate to the first slurry, stir for 0.2h, and stir evenly to obtain the second slurry;

[0072] Step 3: Add 22.22 g of anhydrous sodium carbonate to the second slurry and stir evenly, then add sodium hydroxide, adjust the pH to 10.0 and stir evenly to obtain the third slurry;

[0073] Step 4: crystallize the obtained third slurry at 60° C. for 24 hours, then cool and filter, wash, dry and pulverize the filter cake to obtain the magnesium aluminum hydrotalcite / 4A zeolite composite material.

[0074] The magnesium aluminum hydrotalcite / 4A zeolite composite material prepared in Example 2 has good dispersion properties, and has the advantages of low cost, mild preparation conditions, and simple process.

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Abstract

The invention discloses a hydrotalcite-like composite material and a preparation method thereof. The preparation method comprises: mixing type A zeolite, a silane coupling agent and water, and carrying out mixing stirring for 5-150 min at a temperature of 30-80 DEG C to obtain a first slurry; adding a divalent metal compound and a trivalent metal compound to the first slurry, and stirring for 0.2-2.0 h to obtain a second slurry; adding a carbonate and / or bicarbonate to the second slurry, adding a pH value adjuster, adjusting the pH value to 10-14, and uniformly stirring to obtain a third slurry; and crystallizing the third slurry for 2-24 h at a temperature of 60-200 DEG C, carrying out cooling filtering, washing the filter cake, drying, and crushing to obtain the hydrotalcite-like composite material. According to the present invention, the hydrotalcite-like prepared by using the cheap type A zeolite as the substrate and using the silane coupling agent as the protective agent and the grafting agent has advantages of large specific surface area and good dispersity.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a hydrotalcite-like composite material and a preparation method thereof. Background technique [0002] In the related art, the hydrotalcite itself has the problem of poor dispersibility. In order to improve the dispersibility of hydrotalcite-like, in the prior art, mineral clay is used to prepare hydrotalcite-like composite materials, but the preparation process of this method is complicated, the cost is high, and it is not suitable for industrial application. For example, Chinese patent CN 109499522 A discloses a method for efficiently preparing hydrotalcite-like / montmorillonite inorganic layered composite materials. The hydrotalcite-like / montmorillonite composite material is prepared by intercalation assembly. Although the dispersion of the hydrotalcite-like sheets is improved and its adsorption capacity is greatly increased, the preparation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
CPCC01B33/40C01P2004/80
Inventor 郝向英沈冠华赵闫华袁国栋李志伟吴文胜
Owner ZHAOQING UNIV
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