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Preparation method of highly dispersed nanoflake magnesium hydroxide

A magnesium hydroxide and nano-flaky technology, which is applied in the field of preparation of highly dispersed nano-flaky magnesium hydroxide, can solve the problems of high equipment requirements and energy consumption, obstacles to industrial production, and cumbersome operations, and achieve low equipment requirements and reduce The effect of production cost and simple operation

Active Publication Date: 2014-02-26
JINAN TAIXING FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, relevant data have shown that flake magnesium hydroxide with good dispersibility can be prepared, but it needs to be further treated with hydrothermal and / or dispersant after preparation at room temperature. In addition to the complicated operation, the requirements for equipment and The energy consumption is also high, and the waste water problem needs to be dealt with in the follow-up. The cost is high, and there are great obstacles to the application in industrial production.

Method used

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  • Preparation method of highly dispersed nanoflake magnesium hydroxide
  • Preparation method of highly dispersed nanoflake magnesium hydroxide

Examples

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Effect test

Embodiment 1

[0015] Weigh 50g of sodium hydroxide and dissolve it in 150g of water to make a sodium hydroxide solution with a mass fraction of 25%, then add 2g of potassium oxalate to dissolve it, stir evenly, transfer to a 500 mL three-necked flask, and heat in a water bath at 90°C After constant temperature, add 20g of magnesium oxide, react for 3h, filter with suction, dry and pulverize to obtain 300 nm particle size and highly dispersed flake magnesium hydroxide. The scanning electron microscope picture is as follows: figure 2 shown.

Embodiment 2

[0017] Weigh 40g of sodium hydroxide and dissolve it in 160g of water to make a sodium hydroxide solution with a mass fraction of 20%, then add 4g of potassium oxalate to dissolve it, stir evenly, transfer to a 500 mL three-necked flask, and heat in a water bath at 80°C , after constant temperature, add 20g of magnesium oxide, react for 3h, filter with suction, dry and pulverize to obtain 300nm particle size and highly dispersed flaky magnesium hydroxide.

Embodiment 3

[0019] Weigh 20g of sodium hydroxide and dissolve it in 180g of water to make a sodium hydroxide solution with a mass fraction of 10%, then add 5g of potassium oxalate to dissolve it, stir evenly, transfer to a 500 mL three-necked flask, and heat in a water bath at 70°C , after constant temperature, add 25g of magnesium oxide, react for 4h, filter with suction, dry and pulverize to obtain flaky magnesium hydroxide with a particle size of 300 nm and high dispersion.

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Abstract

The invention discloses a preparation method of highly dispersed nanoflake magnesium hydroxide. The method comprises the steps: with magnesium oxide obtained through high-temperature calcination as a magnesium source, mixing the magnesium source with an alkaline solution; and with potassium oxalate as a dispersant, reacting for a while, and then carrying out water washing, drying and crushing to obtain the highly dispersed nanoflake magnesium hydroxide of which the particle size is 300 nm. The method disclosed by the invention is simple to operate; the prepared magnesium hydroxide is good in dispersibility, low in aggregation, even in particle size, regular in crystal form, low in requirements on equipment, low in cost and environment-friendly without pollution.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical industry and relates to a preparation method of highly dispersed nano flake magnesium hydroxide. Background technique [0002] With the improvement of living standards, people have higher and higher requirements for their working and living environment, and the flame retardant performance of polymer materials has also been highly valued by people. At present, flame retardant is gradually advancing towards non-halogenation and nanometerization. Among them, magnesium hydroxide in inorganic flame retardants is greatly favored due to its high decomposition temperature, good stability, non-toxicity, and no pollution to the environment. s concern. In addition, magnesium hydroxide is also widely used in flue gas desulfurization, wastewater treatment, water quality conditioning, magnesium chemicals, medicines, fertilizers and other fields. [0003] The preparation methods of magnesium hydroxi...

Claims

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Application Information

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IPC IPC(8): C01F5/16B82Y40/00B82Y30/00
Inventor 杜庆田张雅民张旭宋传君
Owner JINAN TAIXING FINE CHEM
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