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Nano magnesium-aluminum hydrotalcite and preparation method thereof

A technology of nano-magnesium and aluminum water, which is applied in the field of materials, can solve problems such as easy agglomeration and uneven mixing of precursor powders, and achieve the effects of good repeatability, good dispersion, and cost-saving production

Active Publication Date: 2017-02-08
BELIKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The use of bubble liquid film can effectively solve the shortcomings of uneven mixing and easy agglomeration of the precursor powder. In the hydrothermal reaction, it can effectively remove the foaming agent remaining on the surface, eliminate pores, and improve the purity of the product.

Method used

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  • Nano magnesium-aluminum hydrotalcite and preparation method thereof
  • Nano magnesium-aluminum hydrotalcite and preparation method thereof
  • Nano magnesium-aluminum hydrotalcite and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] A nano-magnesium-aluminum hydrotalcite, with magnesium chloride, aluminum chloride, sodium carbonate and sodium hydroxide as the main raw materials, adding foaming agent sodium oleate, first preparing the precursor filter cake through bubble liquid film reaction, and then hydrothermally Made by reaction, filtration, washing and drying.

[0038] The method for preparing nano magnesium aluminum hydrotalcite comprises the following steps:

[0039] 1) Add magnesium chloride and aluminum chloride to a certain amount of water to form Mg 2+ The concentration is 2mol / l, Al 3+ A mixed salt solution with a concentration of 0.8mol / l;

[0040] 2) Add sodium carbonate and sodium hydroxide to a certain amount of water to configure CO 3 2- The concentration is 1mol / l, OH - A mixed alkali solution with a concentration of 6.8mol / l;

[0041] 3) adding the foaming aid sodium oleate into a certain amount of water to form a sodium oleate solution with a concentration of 3g / l;

[0042...

Embodiment 2

[0048] A kind of nano-magnesium aluminum hydrotalcite, with magnesium chloride, aluminum chloride, sodium carbonate and sodium hydroxide as main raw materials, adding foaming aid sodium stearate, first preparing precursor filter cake through bubble liquid film reaction, and then passing water Made by heat reaction, filtration, washing and drying.

[0049] The method for preparing nano magnesium aluminum hydrotalcite comprises the following steps:

[0050] 1) Add magnesium chloride and aluminum chloride to a certain amount of water to form Mg 2+ The concentration is 2mol / l, Al 3+ A mixed salt solution with a concentration of 1mol / l;

[0051] 2) Add sodium carbonate and sodium hydroxide to a certain amount of water to configure CO 3 2- The concentration is 1.5mol / l, OH - A mixed alkali solution with a concentration of 5.6mol / l;

[0052] 3) adding the foaming aid sodium stearate into a certain amount of water to form a sodium stearate solution with a concentration of 3 g / l;...

Embodiment 3

[0059] A nano-magnesium-aluminum hydrotalcite, with magnesium chloride, aluminum chloride, sodium carbonate and sodium hydroxide as the main raw materials, adding foaming agent sodium laurate, first preparing the precursor filter cake through bubble liquid film reaction, and then hydrothermally Made by reaction, filtration, washing and drying.

[0060] The method for preparing nano magnesium aluminum hydrotalcite comprises the following steps:

[0061] 1) Add magnesium chloride and aluminum chloride to a certain amount of water to form Mg 2+ The concentration is 2.25mol / l, Al 3+ A mixed salt solution with a concentration of 1mol / l;

[0062] 2) Add sodium carbonate and sodium hydroxide to a certain amount of water to configure CO 3 2- The concentration is 0.6mol / l, OH - A mixed alkali solution with a concentration of 4.8mol / l;

[0063] 3) adding the foaming aid sodium laurate into a certain amount of water to form a sodium laurate solution with a concentration of 3g / l;

...

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Abstract

The present invention discloses a nano magnesium-aluminum hydrotalcite, wherein a soluble magnesium salt, a soluble aluminum salt, a soluble carbonate and an alkaline precipitant are adopted as main raw materials. A foaming assistant is added into the above raw materials. Firstly, a precursor filter cake is prepared through the reaction of a gas bubble liquid membrane. After that, the nano magnesium-aluminum hydrotalcite is prepared based on the hydrothermal reaction through the filtering, washing and drying process. According to the invention, the nano magnesium-aluminum hydrotalcite is prepared based on the combination of the gas bubble liquid membrane process and the hydrothermal reaction. The prepared nano magnesium-aluminum hydrotalcite is uniform in particle size, high in purity, good in dispersibility and good in repeatability. Meanwhile, the preparation process is simple and environment-friendly, and the large-scale production of the nano magnesium-aluminum hydrotalcite is realized. The reaction of the gas bubble liquid membrane can be conducted at a normal temperature and the energy consumption is reduced. The production cost is saved.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a nano-magnesium-aluminum hydrotalcite and a preparation method thereof, in particular to a nano-magnesium-aluminum hydrotalcite prepared by adopting a bubble liquid film method to prepare a precursor, and then hydrothermally reacting the nano-magnesium-aluminum hydrotalcite and a preparation method thereof. Background technique [0002] Hydrotalcite was first discovered by Crica in Sweden in 1842. Its skeleton is a cation, and the interlayer is an anion. E.Manasse of the University of Florence determined that the chemical formula of hydrotalcite is [M 2+ 1-X m 3+ X (OH - ) 2 ] X+ (An-X / n)·mH 2 O, where M 2+ is a divalent metal ion, M 3+ is a trivalent metal ion, An is the number of interlayer anions, and m is the number of interlayer bound water molecules. Natural hydrotalcite (Hydrotalcite, HDT) has only a small amount of deposits in the Urals of Russia and Snarum of Norway. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/00B82Y30/00
CPCB82Y30/00C01P2004/62C01P2006/80C01P2006/12C01P2004/64C01F7/785
Inventor 周云斌刘鑫曾能杨第伦王海
Owner BELIKE CHEM
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