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Synthesis method of hydrotalcite-like compound

A synthesis method, hydrotalcite technology, applied in the direction of zinc oxide/zinc hydroxide, aluminum oxide/aluminum hydroxide, etc., can solve the problems affecting the reform and innovation of the synthesis method of functional materials and sustainable development, and achieve single crystal form and calcination temperature The effect of low cost and simple process

Inactive Publication Date: 2014-04-02
TIANJIN SUYI ELECTRONICS PROD SALES
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Problems solved by technology

Although many molecular composite materials with intercalation structures have entered the stage of industrialization, there are still many mysteries in this field that have not been solved, such as the theoretical construction of laminate precursors and layered structures, and the dynamics in the process of constructing intercalation assemblies. Therefore, the simple and easy method of synthesizing a hydrotalcite-like material will directly affect the reform, innovation and sustainable development of the synthesis method and types of this new type of functional material.

Method used

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  • Synthesis method of hydrotalcite-like compound

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Experimental program
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Effect test

Embodiment

[0012] Weigh a certain quality of zinc nitrate (Zn(NO) 2 ) and aluminum nitrate (Al(NO) 3 ) into a mixed salt solution, which was added dropwise to a three-necked flask filled with 2.01mol / L NaOH and 0.6mol / L STPP mixed alkali solution, stirring continuously during the dropping process, and controlling the reaction within 1 hour , The reaction temperature of the oil bath pot is 45°C. After the dropwise addition, the temperature of the oil bath pot is raised to 90°C. At the same time, the agitator is turned off, and the pH value of the generated white slurry is adjusted to about 10 with NaOH solution, and crystallized for a period of time. Finally, filter with suction, wash with double-distilled water until neutral, place in an oven at 120°C for 6 hours, grind, and sieve with a 100-mesh sieve to obtain a hydrotalcite-like powder.

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Abstract

The invention relates to a preparation method of a hydrotalcite-like compound, which employs a chemical coprecipitation method. The method comprises the steps of dropwise adding a mixed metal salt solution containing divalent metal cations and trivalent metal cations (M<2+> and M<3+>) and a designed interlayer anionic alkali solution into a reaction vessel at a certain specific rate under a continuous stirring condition, keeping the crystallization temperature for crystallization for a period of time after a reaction finishes, and obtaining the designed hydrotalcite-like compound. The method can refine and uniformly mix raw materials, and has the advantages of simple technology, low calcination temperature, short time, single crystal form, relative pureness of a product, and the like.

Description

technical field [0001] The invention belongs to the field of organic synthesis, and in particular relates to a preparation method of hydrotalcite-like. Background technique [0002] The development of hydrotalcite-like compounds (LDHs) has experienced a history of more than one hundred years. Hydrotalcites have attracted much attention due to their special structure and multiple functions. They have become a hot spot in the field of new materials in recent years, and developed countries are competing for research and development. Hydrotalcite-like compounds are one of the anionic clays. They are the general term for hydrotalcite-like and hydrotalcite. The slabs of hydrotalcite are mostly composed of hydroxides of two metals, so they are also called layered double hydroxyl metal hydroxides. (LDH). The most typical basic structural features of LDHs are: hydrotalcite laminates are stacked and arranged in a specific order to form a three-dimensional crystal structure. The comm...

Claims

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Application Information

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IPC IPC(8): C01F7/02C01G9/02
Inventor 王娜邱亚娟
Owner TIANJIN SUYI ELECTRONICS PROD SALES