CN103803603A - Preparation method of flaky magnesium hydroxide - Google Patents
Preparation method of flaky magnesium hydroxide Download PDFInfo
- Publication number
- CN103803603A CN103803603A CN201210457864.7A CN201210457864A CN103803603A CN 103803603 A CN103803603 A CN 103803603A CN 201210457864 A CN201210457864 A CN 201210457864A CN 103803603 A CN103803603 A CN 103803603A
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- magnesium hydroxide
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- flaky
- reactor
- flake
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Abstract
The invention relates to a preparation method of magnesium hydroxide, particularly a preparation method of flaky magnesium hydroxide. The method comprises the following steps: mixing a magnesium chloride solution and aqua ammonia to obtain a white precipitate, wherein the dropwise addition speed of the aqua ammonia is controlled at 30-60 ml/minute or so; transferring the white intermediate product into a reaction kettle which contains a potassium oxalate solution, and carrying out hydrothermal reaction at 180-200 DEG C for 14-48 hours; and carrying out after-treatment to finally obtain the flaky magnesium hydroxide. Simple hydrothermal reaction is performed to obtain the magnesium hydroxide product with favorable crystallinity.
Description
Technical field
The present invention relates to a kind of preparation method of magnesium hydroxide, relate in particular to a kind of preparation method of flake magnesium hydroxide.
Background technology
Sheet-like magnesium hydroxide crystal is in preparation process, and an outstanding problem is exactly that degree of crystallinity is not high, and this will be very large on character impact, greatly limited the application of product.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, a kind of preparation method of flake magnesium hydroxide is provided.Can obtain the flake magnesium hydroxide of high-crystallinity.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of preparation method of flake magnesium hydroxide, it is characterized in that, and comprise the following steps:
Magnesium chloride solution is mixed with ammonia soln, and described ammonia soln drips control speed and is approximately 30-60 ml/min, obtains white precipitate;
Described white intermediate product is forwarded in reactor, in described reactor, contain Potassium Oxalate Solution, hydro-thermal reaction time 14-48h, temperature of reaction 180-200 ℃;
After aftertreatment, finally obtain again flake magnesium hydroxide.
The invention has the beneficial effects as follows: magnesium hydroxide, by simple hydro-thermal reaction, reaches the magnesium hydroxide products of better crystallinity degree.
Embodiment
Below principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
A preparation method for flake magnesium hydroxide, is characterized in that, comprises the following steps: magnesium chloride solution is mixed with ammonia soln, and described ammonia soln drips control speed and is approximately 30-60 ml/min, obtains white precipitate; Described white intermediate product is forwarded in reactor, in described reactor, contain Potassium Oxalate Solution, 200 ℃ of hydro-thermal reaction time 48h, temperature of reaction; After aftertreatment, finally obtain again flake magnesium hydroxide.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. a preparation method for flake magnesium hydroxide, is characterized in that, comprises the following steps:
Magnesium chloride solution is mixed with ammonia soln, and described ammonia soln drips control speed and is approximately 30-60 ml/min, obtains white precipitate;
Described white intermediate product is forwarded in reactor, in described reactor, contain Potassium Oxalate Solution, hydro-thermal reaction time 14-48h, temperature of reaction 180-200 ℃;
After aftertreatment, finally obtain again flake magnesium hydroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210457864.7A CN103803603A (en) | 2012-11-15 | 2012-11-15 | Preparation method of flaky magnesium hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210457864.7A CN103803603A (en) | 2012-11-15 | 2012-11-15 | Preparation method of flaky magnesium hydroxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103803603A true CN103803603A (en) | 2014-05-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210457864.7A Pending CN103803603A (en) | 2012-11-15 | 2012-11-15 | Preparation method of flaky magnesium hydroxide |
Country Status (1)
| Country | Link |
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| CN (1) | CN103803603A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673024A (en) * | 2017-03-13 | 2017-05-17 | 天津科技大学 | Method for preparing high-purity hexagonal piece-shaped magnesium hydroxide from magnesium oxide |
-
2012
- 2012-11-15 CN CN201210457864.7A patent/CN103803603A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673024A (en) * | 2017-03-13 | 2017-05-17 | 天津科技大学 | Method for preparing high-purity hexagonal piece-shaped magnesium hydroxide from magnesium oxide |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140521 |