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Preparation method of organic acid anion intercalation hydrotalcite

A technology of anion intercalation and organic acid, which is applied in the field of functional materials, can solve the problem that a single organic acid anion intercalation hydrotalcite cannot be obtained in one step, and achieve the effects of low price, narrow particle size distribution, and simple process flow

Inactive Publication Date: 2011-04-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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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 solve the problem that a single organic acid anion intercalated hydrotalcite cannot be obtained in one step in the prior art, and a method for preparing an organic acid anion intercalated hydrotalcite is provided. The preparation method uses solid oxide or hydrogen oxides as raw materials, only one step can be synthesized to obtain the organic acid anion intercalation hydrotalcite of the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare Mg(OH) separately 2 , Al(OH) 3 The slurry was washed by suction to obtain fresh Mg(OH) 2 , Al(OH) 3 filter cake. Weigh Mg(OH) 2 Filter cake 1.11g, of which Mg(OH) 2 The content is 21.0%, Al(OH) 3 Filter cake 1.36g, of which Al(OH) 3 Content is 11.5% and 0.33g of terephthalic acid is added to 80ml to remove CO 2 in deionized water, and stir well to obtain a suspension. The suspension was placed in a 100ml pressure reactor and reacted at 60°C for 10 hours to obtain the product. The product is suction filtered, washed and dried to obtain terephthalate intercalated hydrotalcite, which is an organic acid anion intercalated hydrotalcite described in the present invention.

[0025] According to X-ray diffraction (XRD) analysis and infrared spectroscopic analysis (FTIR), the hydrotalcite intercalated with terephthalate radicals is hydrotalcite intercalated with terephthalate radicals with a single crystal phase.

Embodiment 2

[0027] Prepare Mg(OH) separately 2 , Al(OH) 3 The slurry was washed by suction to obtain fresh Mg(OH) 2 , Al(OH) 3 filter cake. Weigh Mg(OH) 2 Filter cake 1.11g, of which Mg(OH) 2 The content is 21.0%, Al(OH) 3 Filter cake 1.36g, of which Al(OH) 3 The content is 11.5% and 0.30g of adipic acid is added to 80ml to remove CO 2 in deionized water, and stir well to obtain a suspension. The suspension was placed in a 100ml pressure reactor and reacted at 180°C for 6 hours to obtain the product. The product is suction filtered, washed and dried to obtain adipate intercalated hydrotalcite, which is an organic acid anion intercalated hydrotalcite described in the present invention.

[0028] According to X-ray diffraction (XRD) analysis and infrared spectrum analysis (FTIR), the adipate intercalated hydrotalcite is adipate intercalated hydrotalcite with a single crystal phase.

Embodiment 3

[0030] Prepare Mg(OH) separately 2 , Al(OH) 3 The slurry was washed by suction to obtain fresh Mg(OH) 2 , Al(OH) 3 filter cake. Weigh Mg(OH) 2 Filter cake 1.66g, of which Mg(OH) 2 The content is 21.0%, Al(OH) 3 Filter cake 1.36g, of which Al(OH) 3 Content is 11.5% and citric acid 0.40g is added to 80ml to remove CO 2in deionized water, and stir well to obtain a suspension. The suspension was placed in a 100 ml three-neck flask, and stirred at 100° C. under reflux for 4 hours to obtain the product. The product is suction filtered, washed and dried to obtain citrate intercalated hydrotalcite, which is an organic acid anion intercalated hydrotalcite described in the present invention.

[0031] According to X-ray diffraction (XRD) analysis and infrared spectroscopic analysis (FTIR), the citrate intercalated hydrotalcite is citrate intercalated hydrotalcite with a single crystal phase.

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Abstract

The invention provides a preparation method of organic acid anion intercalation hydrotalcite, belonging to the technical field of functional materials. Aiming at the problem that single organic acid anion intercalation hydrotalcite can not be obtained by one step in the prior art. The preparation method comprises the following steps of: with the oxide or hydroxide of divalent metal elements and trivalent metal elements as raw materials, mixing the divalent metal elements and the trivalent metal elements in the raw materials at the molar ratio of 2:1-4:1, and then adding excess organic acid solid to be intercalated to obtain a mixture; adding the mixture into deionized water from which CO2 is removed; fully and evenly stirring the mixture to obtain a suspension; placing the suspension in a pressure reaction kettle for reacting or placing in a container to carry out heating reflux reaction to obtain a product; and filtering, washing and drying the product to obtain the organic acid anion intercalation hydrotalcite. The invention has wide raw material source, low cost and simple process flow and can prepare the organic acid anion intercalation hydrotalcite only by one step.

Description

technical field [0001] The invention relates to a preparation method of organic acid anion intercalation hydrotalcite, in particular to a preparation method of organic acid anion intercalation hydrotalcite using solid oxide or hydroxide as raw material, belonging to the technical field of functional materials . Background technique [0002] Hydrotalcite, also known as layered double hydroxides (LDHs for short), is formed by the orderly assembly of positively charged laminates composed of two or more metal cations and interlayer anions. compound of. An important property of LDHs (hydrotalcites, also known as layered double hydroxyl complex metal hydroxides) is the exchangeability of anions between their layers. Various anions such as organic acid anions, complex anions, isopoly and heteropolyanions, polymer anions, etc. can be inserted into the interlayer of LDHs, making them have broad application prospects in the fields of catalysis, adsorption, functional materials, and ...

Claims

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Application Information

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IPC IPC(8): C01B13/14
Inventor 矫庆泽崔文甲赵芸
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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