High pressure intercalation assembly method and application in preparation field of intercalation structure composite material

A composite material and intercalation technology, applied in chemical instruments and methods, aluminum compounds, inorganic chemistry, etc., can solve problems such as pollution, complex process, waste of water resources and environment, and achieve the effect of increasing solubility and simple process

Inactive Publication Date: 2015-08-26
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The products prepared from such raw materials usually contain a large amount of by-product sodium salts and excessive guest molecules, which need to be washed with a large amount of water, resulting in complex processes, waste of water resources and environmental pollution.

Method used

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  • High pressure intercalation assembly method and application in preparation field of intercalation structure composite material
  • High pressure intercalation assembly method and application in preparation field of intercalation structure composite material
  • High pressure intercalation assembly method and application in preparation field of intercalation structure composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A: Add industrial grade Mg(OH) 2 Add AlOOH and Mg / Al molar ratio = 2 / 1 into the ball mill tank, then put it into the ball mill and grind for 2 hours, take out the sample for later use;

[0021] B: Add lauric acid (LA for short) to 80ml deionized water according to LA / Al=1 / 1, then add the mixture sample in step A, Mg(OH) 2 The total mass fraction of AlOOH and AlOOH is 0.5%, ultrasonic and stirred for 10min;

[0022] C: Transfer the suspension mixed in step B to the autoclave, stir for 1 hour, then raise the temperature to 150°C, first pressurize to 0.8MPa, stir for 6 hours; continue to pressurize to 1.0MPa, stir for 6 hours, and finally pressurize to 1.5 MPa, after stirring for 10 hours, take it out, and after centrifugation, put the sample into an oven at 60°C for drying to obtain the intercalation structure composite material MgAl-LA-LDHs.

[0023] The pressurization method is to feed nitrogen into the pressurization.

[0024] Such as figure 1 Shown, where line 1 i...

Embodiment 2

[0026] A: Mg(OH) 2 Add AlOOH and Mg / Al=2 / 1 into the ball mill tank, then put it into the ball mill and grind for 3 hours, take out the sample for later use;

[0027] B: Add lauric acid to 80ml deionized water according to LA / Al=1 / 1, then add the mixture sample in step A, Mg(OH) 2 The total mass fraction of AlOOH and AlOOH is 2.0%, ultrasonic and stirred for 10min;

[0028] C: Transfer the suspension mixed in step B to an autoclave, stir for 1 hour, then raise the temperature to 150°C, first pressurize to 0.8MPa, stir for 6 hours; continue to pressurize to 2.0MPa, stir for 6 hours, and finally pressurize to 3.0 MPa, after 10 hours of stirring reaction, take it out, after centrifugation, put the sample into a 60°C oven to dry, and then obtain the intercalation structure composite material MgAl-LA-LDHs.

[0029] The pressurization method is to feed nitrogen into the pressurization.

[0030] Characterized: the hydrotalcite prepared under the above conditions has a good crystal ...

Embodiment 3

[0032] A: Mg(OH) 2 Add AlOOH and Mg / Al=3 / 1 into the ball mill tank, then put it into the ball mill and grind for 2 hours, take out the sample for later use;

[0033] B: Add lauric acid to 80ml deionized water according to LA / Al=1 / 1, then add the mixture sample in step A, Mg(OH) 2 The total mass fraction of AlOOH and AlOOH is 5.0%, ultrasonic and stirred for 10 min.

[0034]C: Transfer the suspension mixed in step B to an autoclave, stir for 1 hour, then raise the temperature to 150°C, first pressurize to 1.0MPa, stir for 6 hours; continue to pressurize to 2.0MPa, stir for 6 hours, and finally pressurize to 4.0 MPa, after 10 hours of stirring reaction, take it out, and after centrifugation, put the sample into an oven at 60°C to dry to obtain the intercalation structure composite material MgAl-LA-LDHs.

[0035] The pressurization method is to feed nitrogen into the pressurization.

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Abstract

The invention discloses a high pressure intercalation assembly method and application in preparation field of intercalation structure composite material. When preparing difficult soluble object intercalation hydrotalcite by using conventional method, object molecule solubility is extremely low, bivalence and trivalent metal salt solubility is relatively high, intercalation condition is not met in dynamics, and difficult soluble object intercalation hydrotalcite composite material cannot be prepared; if the raw material adopts the dissolubility salt for intercalation, the use amount of the object is excessive, a large amount of water is used for washing the reaction product after the reaction, the technology is complex, the water source is wasted and the environment pollution is generated. High temperature pressed mode is adopted for effectively improving solubility of the object; substep crystallization mode is adopted for guaranteeing sufficient reaction between the dissolved object molecule and the slowly ionized metallic oxide or hydroxide; the reaction system meets stoichiometric ratio and is the typical atom economy reaction, the technology is simple, no by-product is generated and the washing process is not required.

Description

technical field [0001] The invention belongs to the technical field of hydrotalcite preparation, in particular to a high-pressure intercalation assembly method and its application in the field of preparing intercalation structure composite materials. Background technique [0002] Hydrotalcite compounds are a typical type of anionic intercalation materials, also known as layered double hydroxyl compound metal hydroxides (Layered Double Hydroxides, abbreviated as LDHs), and its intercalation compounds are called intercalation LDHs. Due to the unique layered structure of LDHs and the interlayer anions can be exchanged and replaced by various functional anion groups, the layered structure and composition will change accordingly, so that it can be obtained with light, electricity, sound, magnetism, catalysis, adsorption, etc. , drug sustained release, ion exchange and other special properties of functional materials. Therefore, it has become one of the hotspots in the research f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/00
Inventor 韩景宾李忠泽李凯涛林彦军靳兰卫敏
Owner BEIJING UNIV OF CHEM TECH
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