Preparation method of micro-nano hydroxyl magnesium silicate

A hydroxymagnesium silicate, micro-nano technology, applied in the direction of magnesium silicate, silicate, nanotechnology, etc., can solve the problem that the consistency of samples is difficult to control

Inactive Publication Date: 2015-01-07
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the consistency of the synthesized samples is difficult to control

Method used

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  • Preparation method of micro-nano hydroxyl magnesium silicate
  • Preparation method of micro-nano hydroxyl magnesium silicate
  • Preparation method of micro-nano hydroxyl magnesium silicate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The steps of a preparation method of micro-nano-scale magnesium hydroxysilicate:

[0023] a. sodium hydroxide is mixed with the aqueous solution of 1mol / L;

[0024] b. mixing nano-magnesia and nano-silicon dioxide in a container according to a molar ratio of 3: 2, and adding the sodium hydroxide solution prepared in step a, and the addition is 80% of the volume of the container. After fully mixing, move it into the reactor, and react for 72 hours at a temperature of 200°C;

[0025] c. Filter the reacted mixed solution with pure water until the filtrate is neutral, and dry the filtered filter cake at 80° C. to obtain micronano-scale magnesium hydroxysilicate powder.

[0026] Product performance testing:

[0027] Carry out XRD and transmission electron microscope analysis detection result to the prepared micronano grade magnesium silicate powder body as follows figure 1 (SEM), Image 6 (XRD) shows.

Embodiment 2

[0029] The steps of a preparation method of micro-nano-scale magnesium hydroxysilicate:

[0030] a. Sodium hydroxide is mixed with the aqueous solution of 0.5mol / L;

[0031] b. mixing nano-magnesia and nano-silicon dioxide in a container according to a molar ratio of 1:1, and adding the sodium hydroxide solution prepared in step a, the amount of which is 60% of the volume of the container. After fully mixing, move it into the reactor, and react for 96 hours at a temperature of 180°C;

[0032] c. Filter the reacted mixed solution with pure water until the filtrate is neutral, and dry the filtered filter cake at 80° C. to finally produce micronano-scale magnesium hydroxysilicate powder.

[0033] Product performance testing:

[0034] The obtained nanoscale magnesium hydroxysilicate powder was carried out by XRD and transmission electron microscopy and the detection results were as follows: figure 2 (SEM), Figure 7 (XRD) shows.

Embodiment 3

[0036] The steps of a preparation method of micro-nano-scale magnesium hydroxysilicate:

[0037] a. sodium hydroxide is mixed with the aqueous solution of 2mol / L;

[0038] b. mixing nano-magnesia and nano-silicon dioxide in a container according to a molar ratio of 4: 3, and adding the sodium hydroxide solution prepared in step a, the amount of which is 90% of the volume of the container. After fully mixing, move it into the reactor, and react for 48 hours at a temperature of 220°C;

[0039] c. Filter the reacted mixed solution with pure water until the filtrate is neutral, and dry the filtered filter cake at 80° C. to finally produce micronano-scale magnesium hydroxysilicate powder.

[0040] Product performance testing:

[0041] The obtained nanoscale magnesium hydroxysilicate powder was carried out by XRD and transmission electron microscopy and the detection results were as follows: image 3 (SEM), Figure 8 (XRD) shows.

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Abstract

The invention provides a preparation method of micro-nano hydroxyl magnesium silicate. The method is capable of producing high-quality micro-nano hydroxyl magnesium silicate powder products in large scale. The method comprises the following steps: preparing sodium hydroxide into a 0.001-2mol/L solution; mixing nanometer magnesia and nanosilicon dioxide in a container according to a mole ratio of 1 to (0.5-2), adding the prepared sodium hydroxide solution into the container, transferring the solution to a reaction kettle, and reacting for 24-96 hours under the condition at the temperature of 170-300 DEG C; filtering the reacted mixture solution by pure water and drying the filter cake after filtering under the condition at the temperature of 50-100 DEG C to obtain the micro-nano hydroxyl magnesium silicate powder. According to the method, by virtue of precursor nanometer magnesia and nanosilicon dioxide, the micro-nano hydroxyl magnesium silicate is synthesized by a high-temperature hydrothermal method under the condition of a strong base; the thickness of hydroxyl magnesium silicate powder pieces is between 60 nanometers and 20 microns.

Description

technical field [0001] The invention relates to a preparation method of micronano-scale powder, in particular to a preparation method of micronano-scale hydroxymagnesium silicate. Background technique [0002] Magnesium hydroxysilicate has a wide range of applications. At present, the main source of hydroxymagnesium silicate is obtained by mechanically pulverizing natural silicate ore, which has many impurities, is difficult to purify, has uneven particle size, and poor consistency and is difficult to reach the nanometer level. The shortcomings of natural ores have greatly limited their applications. The development of nanotechnology has made it possible to prepare micro-nano-scale magnesium hydroxysilicate. Patent Publication (Announcement) No.: CN101386713A discloses a nano-hydroxy magnesium silicate powder and a preparation method thereof. The method uses diatomite, magnesium sulfate, sodium hydroxide, and sodium peroxide as raw materials for the preparation of hydroxy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/22B82Y30/00B82Y40/00
Inventor 王开明郑淑敏
Owner UNIV OF SCI & TECH LIAONING
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