CN103789836A - Preparation method for magnesium hydroxide crystal whiskers - Google Patents
Preparation method for magnesium hydroxide crystal whiskers Download PDFInfo
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- CN103789836A CN103789836A CN201210423731.8A CN201210423731A CN103789836A CN 103789836 A CN103789836 A CN 103789836A CN 201210423731 A CN201210423731 A CN 201210423731A CN 103789836 A CN103789836 A CN 103789836A
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- magnesium sulfate
- magnesium
- magnesium hydroxide
- solution
- hydroxide
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Abstract
The invention relates to a preparation method for magnesium hydroxide crystal whiskers. The paration method for magnesium hydroxide comprises the following steps of mixing magnesium sulfate heptahydrate powder and ethanol in a thermostatic water bath with stirring and adding ethanediol when a temperature is constant at 40-60 DEG C to prepare a magnesium sulfate solution, a molar concentration ratio of the magnesium sulfate heptahydrate powder to ehanol to ethanediol being 14-35:10-50:5-15; mixing the magnesium sulfate solution with a potassium hydroxide ethanol solution by dropwise adding the potassium hydroxide solution into the magnesium sulfate solution at a speed of 30-50 times/h, wherein a molar concentration ratio of the magnesium sulfate solution to the potassium hydroxide ethanol solution is 50-70:3-10; putting the above titrated mixture into a hydrothermal reaction kettle; performing a hydrothermal reaction for 36-48 h at a temperature of 220-240 DEG C; carrying out vacuum filtration; and drying at a room temperature to obtain a product. The preparation method has the beneficial effects that magnesium hydroxide is prepared by firstly preparing magnesium hydroxide sulfate from magnesium sulfate by using a precursor method and then transferring magnesium hydroxide sulfate into magnesium hydroxide. In the above process, crystal whisker morphology is kept. The method is simple and is easy to operate.
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 magnesium hydroxide crystal whisker.
Background technology
Inorganic magnesium salt whisker has plurality of advantages, not only has good fire-retardantly and strengthen the property, and decompose and do not produce hazardous and noxious substances, and be environmental friendliness shaped material, be therefore a class inorganic crystal whisker material that has development prospect.But its research is in the starting stage, and especially the preparation method of magnesium hydroxide crystal whisker is in the junior stage.
Summary of the invention
The present invention is directed to the deficiency that above-mentioned prior art exists, a kind of preparation method of magnesium hydroxide crystal whisker is provided.Can make the magnesium hydroxide crystal whisker product that pattern is good.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of preparation method of magnesium hydroxide crystal whisker, it is characterized in that, the preparation process of described magnesium hydroxide is as follows: first magnesium sulfate heptahydrate powder is mixed in thermostat water bath while stirring with ethanol, until temperature constant temperature after 40-60 ℃, add ethylene glycol, make Adlerika, the molar concentration rate of described magnesium sulfate heptahydrate powder, ethanol and ethylene glycol is 14-35:10-50:5-15; Described Adlerika is mixed with potassium hydroxide-ethanol solution, described mixing process is that potassium hydroxide solution is added drop-wise in Adlerika according to the speed of 30-50 time/h, and described Adlerika and potassium hydroxide-ethanol solution molar concentration rate are 50-70:3-10; Mixture after above-mentioned titration is put into hydrothermal reaction kettle, hydrothermal temperature 220-240 ℃, hydro-thermal reaction 36-48h; Reaction finishes final vacuum suction filtration, drying at room temperature, obtains product.
The invention has the beneficial effects as follows: make alkali magnesium sulfate through precursor method by magnesium sulfate and be converted into magnesium hydroxide again, in this process, whisker morphology keeps, method is simple, easy handling.
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 kind of preparation method of magnesium hydroxide crystal whisker, its preparation process is as follows: first magnesium sulfate heptahydrate powder is mixed in thermostat water bath while stirring with ethanol, until temperature constant temperature after 40 ℃, add ethylene glycol, make Adlerika, the molar concentration rate of described magnesium sulfate heptahydrate powder, ethanol and ethylene glycol is 15:10:15; Described Adlerika is mixed with potassium hydroxide-ethanol solution, and described mixing process is that potassium hydroxide solution is added drop-wise in Adlerika according to the speed of 30 times/h, and described Adlerika and potassium hydroxide-ethanol solution molar concentration rate are 50:5; Mixture after above-mentioned titration is put into hydrothermal reaction kettle, 240 ℃ of hydrothermal temperatures, hydro-thermal reaction 48h; Reaction finishes final vacuum suction filtration, drying at room temperature, obtains product.
Claims (1)
1. a preparation method for magnesium hydroxide crystal whisker, is characterized in that, the preparation process of described magnesium hydroxide is as follows:
First magnesium sulfate heptahydrate powder is mixed in thermostat water bath while stirring with ethanol, until temperature constant temperature after 40-60 ℃, add ethylene glycol, make Adlerika, the molar concentration rate of described magnesium sulfate heptahydrate powder, ethanol and ethylene glycol is 14-35:10-50:5-15;
Described Adlerika is mixed with potassium hydroxide-ethanol solution, described mixing process is that potassium hydroxide solution is added drop-wise in Adlerika according to the speed of 30-50 time/h, and described Adlerika and potassium hydroxide-ethanol solution molar concentration rate are 50-70:3-10;
Mixture after above-mentioned titration is put into hydrothermal reaction kettle, hydrothermal temperature 220-240 ℃, hydro-thermal reaction 36-48h;
Reaction finishes final vacuum suction filtration, drying at room temperature, obtains product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210423731.8A CN103789836A (en) | 2012-10-30 | 2012-10-30 | Preparation method for magnesium hydroxide crystal whiskers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210423731.8A CN103789836A (en) | 2012-10-30 | 2012-10-30 | Preparation method for magnesium hydroxide crystal whiskers |
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| Publication Number | Publication Date |
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| CN103789836A true CN103789836A (en) | 2014-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210423731.8A Pending CN103789836A (en) | 2012-10-30 | 2012-10-30 | Preparation method for magnesium hydroxide crystal whiskers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445303A (en) * | 2014-11-03 | 2015-03-25 | 苏州市泽镁新材料科技有限公司 | Preparation method of magnesium hydrate |
| CN108706611A (en) * | 2018-05-29 | 2018-10-26 | 国家海洋局天津海水淡化与综合利用研究所 | A kind of magnesium hydroxide one-dimensional material preparation method that size is controllable |
| CN110629288A (en) * | 2019-10-24 | 2019-12-31 | 营口理工学院 | Method for preparing whisker-shaped gadolinium aluminate powder material by hydrothermal technology |
-
2012
- 2012-10-30 CN CN201210423731.8A patent/CN103789836A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445303A (en) * | 2014-11-03 | 2015-03-25 | 苏州市泽镁新材料科技有限公司 | Preparation method of magnesium hydrate |
| CN108706611A (en) * | 2018-05-29 | 2018-10-26 | 国家海洋局天津海水淡化与综合利用研究所 | A kind of magnesium hydroxide one-dimensional material preparation method that size is controllable |
| CN108706611B (en) * | 2018-05-29 | 2021-04-16 | 自然资源部天津海水淡化与综合利用研究所 | Preparation method of size-controllable magnesium hydroxide one-dimensional material |
| CN110629288A (en) * | 2019-10-24 | 2019-12-31 | 营口理工学院 | Method for preparing whisker-shaped gadolinium aluminate powder material by hydrothermal technology |
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| 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: 20140514 |