A kind of preparation method of inorganic layered supramolecular material

Abstract

The invention discloses a method for preparing an inorganic layered supramolecular material, which relates to the technical field of supramolecular material preparation. It includes the following steps: preparing Al(OH) 3 Pulverized for use; the CaCO 3 Calcined in a muffle furnace, when it is cooled to 180‑200 °C, add water to make it fully hydrated; prepare calcium salt; prepare Al(OH) 3 , Ca(OH) 2 , calcium salt and water are mixed; the mixed slurry is pumped into the reaction kettle, and the mixed slurry is fully reacted. Inorganic layered supramolecular materials were prepared. The advantages of the present invention are: the acquisition of calcium and aluminum elements is easier; before the reaction, the Al(OH) 3 , Ca(OH) 2 , calcium salt for preliminary mixing, and then enter the reactor for high-temperature reaction to make the reaction more thorough. The supernatant obtained after the reaction can be recycled into the blending tank to save resources; the prepared inorganic layered supramolecular material has high purity.

Description

technical field [0001] The invention relates to the technical field of preparation of supramolecular materials, in particular to a preparation method of inorganic layered supramolecular materials. Background technique [0002] Calcium-aluminum hydrotalcite is a double metal hydroxide with a layered structure. Its typical chemical formula is Ca4Al2(OH)12(CO3)(H2O)5. It has properties such as adjustable composition and structure, and basic properties. It is used in PVC heat stabilizer, construction, water pollution treatment and other fields. [0003] In the prior art, calcium-aluminum hydrotalcites can be prepared in one step by co-precipitation, hydrothermal, microwave synthesis and other methods. However, in the process of preparing calcium-aluminum hydrotalcites by these methods, soluble salts such as calcium nitrate and aluminum nitrate are usually used as main raw materials, and the mass fraction of available calcium and aluminum elements in this type of raw material is...

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Problems solved by technology

However, in the process of preparing calcium-aluminum hydrotalcites by these methods, soluble salts such as calcium nitrate and aluminum nitrate are usually used as main raw materials, and the mass fraction of available calcium and aluminum elements in this type of raw material is no more than 20%. Al element is usually obtained in the form of salt, which is not easy to obtain, and during the preparation process, carbonate or hydroxide and calcium and aluminum ions are more likely to form stable impurities such as CaCO3, Ca3Al2(OH)12, and the prepared calcium aluminum hydrotalcite The utilization rate of atoms is low, and there are many by-products. It is difficult to separate the by-products from the main product calcium-aluminum hydrotalcite, so the purity of the obtained calcium-aluminum hydrotalcite is low, which seriously affects the performance of calcium-aluminum hydrotalcite.

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