CN103803602A - Preparation method of magnesium hydroxide flame retardant - Google Patents
Preparation method of magnesium hydroxide flame retardant Download PDFInfo
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- CN103803602A CN103803602A CN201210456976.0A CN201210456976A CN103803602A CN 103803602 A CN103803602 A CN 103803602A CN 201210456976 A CN201210456976 A CN 201210456976A CN 103803602 A CN103803602 A CN 103803602A
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- magnesium hydroxide
- flame retardant
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- filter cake
- molar concentration
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to a preparation method of a magnesium hydroxide flame retardant. The method comprises the following steps: slowly and dropwisely adding weak aqua ammonia into a magnesium chloride solution to form a slurry; filtering and washing the slurry several times to obtain a filter cake; adding the filter cake into a sodium hydroxide solution, and carrying out ultrasonic treatment for 0.5-1 hour, wherein the molar concentration of the sodium hydroxide solution is 3-5 mol/L; putting into a reaction kettle, and reacting at 120-150 DEG C for 4-24 hour; and standing for 1-2 days, and finally, carrying out after-treatment to obtain the magnesium hydroxide product. The molar concentration of the weak aqua ammonia is 0.2-0.8 mol/L. The precipitation-water bath method is utilized to prepare the magnesium hydroxide flame retardant at high repeatability.
Description
The present invention relates to a kind of preparation method of flame retardant of magnesium hydroxide, belong to inorganic salt field.
Background technology
Along with the progressively enhancing of people's environmental consciousness, halogen-containing flame retardant is progressively eliminated.The fire retardant of thereupon developing without halide is extremely urgent work.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, a kind of preparation method of flame retardant of magnesium hydroxide is provided.Can make environment-friendly type flame retardant of magnesium hydroxide.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of preparation method of flame retardant of magnesium hydroxide, it is characterized in that, and comprise the following steps:
Weak ammonia is slowly added drop-wise in magnesium chloride solution, forms slurries;
Described slurries are obtained to filter cake after filtering for several times, washing;
Described filter cake is joined in sodium hydroxide solution, supersound process 0.5-1h, wherein the volumetric molar concentration of sodium hydroxide solution is 3mol/L-5mol/L;
Put it into again in reactor reaction times 4-24h, temperature of reaction 120-150 ℃;
Leave standstill 1-2 days, obtain magnesium hydroxide product finally by aftertreatment.
Described weak ammonia volumetric molar concentration is 0.2mol/L-0.8mol/L.
The invention has the beneficial effects as follows: by precipitation-immersion method, what repeatability was high makes flame retardant of magnesium hydroxide.
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 flame retardant of magnesium hydroxide, is characterized in that, comprises the following steps:
Weak ammonia is slowly added drop-wise in magnesium chloride solution, forms slurries;
Described slurries are obtained to filter cake after filtering for several times, washing;
Described filter cake is joined in sodium hydroxide solution, supersound process 0.5-1h, wherein the volumetric molar concentration of sodium hydroxide solution is 4mol/L;
Put it into again in reactor 150 ℃ of reaction times 10h, temperature of reaction;
Leave standstill 2 days, obtain magnesium hydroxide product finally by aftertreatment.
Described weak ammonia volumetric molar concentration is 0.5mol/L.
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 (2)
1. a preparation method for flame retardant of magnesium hydroxide, is characterized in that, comprises the following steps:
Weak ammonia is slowly added drop-wise in magnesium chloride solution, forms slurries;
Described slurries are obtained to filter cake after filtering for several times, washing;
Described filter cake is joined in sodium hydroxide solution, supersound process 0.5-1h, wherein the volumetric molar concentration of sodium hydroxide solution is 3mol/L-5mol/L;
Put it into again in reactor reaction times 4-24h, temperature of reaction 120-150 ℃;
Leave standstill 1-2 days, obtain magnesium hydroxide product finally by aftertreatment.
2. the preparation method of a kind of flame retardant of magnesium hydroxide according to claim 1, is characterized in that, described weak ammonia volumetric molar concentration is 0.2mol/L-0.8mol/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210456976.0A CN103803602A (en) | 2012-11-15 | 2012-11-15 | Preparation method of magnesium hydroxide flame retardant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210456976.0A CN103803602A (en) | 2012-11-15 | 2012-11-15 | Preparation method of magnesium hydroxide flame retardant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103803602A true CN103803602A (en) | 2014-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201210456976.0A Pending CN103803602A (en) | 2012-11-15 | 2012-11-15 | Preparation method of magnesium hydroxide flame retardant |
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| CN (1) | CN103803602A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107128962A (en) * | 2017-05-04 | 2017-09-05 | 四川理工学院 | A kind of preparation method of nano-sized magnesium hydroxide |
| CN109438981A (en) * | 2018-11-13 | 2019-03-08 | 云南锡业集团（控股）有限责任公司研发中心 | A kind of preparation method of the compound flame retardant of magnesium hydroxide of polyaniline |
| CN113881445A (en) * | 2021-09-29 | 2022-01-04 | 白银康宝新型节能建材有限责任公司 | Preparation method of magnesium-based flame-retardant material |
-
2012
- 2012-11-15 CN CN201210456976.0A patent/CN103803602A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107128962A (en) * | 2017-05-04 | 2017-09-05 | 四川理工学院 | A kind of preparation method of nano-sized magnesium hydroxide |
| CN109438981A (en) * | 2018-11-13 | 2019-03-08 | 云南锡业集团（控股）有限责任公司研发中心 | A kind of preparation method of the compound flame retardant of magnesium hydroxide of polyaniline |
| CN109438981B (en) * | 2018-11-13 | 2021-01-01 | 云南锡业集团（控股）有限责任公司研发中心 | Preparation method of polyaniline composite magnesium hydroxide flame retardant |
| CN113881445A (en) * | 2021-09-29 | 2022-01-04 | 白银康宝新型节能建材有限责任公司 | Preparation method of magnesium-based flame-retardant material |
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Legal Events
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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: 20140521 |