CN112390272A - Water-soluble magnesium hydroxide fire retardant and preparation method thereof - Google Patents
Water-soluble magnesium hydroxide fire retardant and preparation method thereof Download PDFInfo
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- CN112390272A CN112390272A CN201910812445.2A CN201910812445A CN112390272A CN 112390272 A CN112390272 A CN 112390272A CN 201910812445 A CN201910812445 A CN 201910812445A CN 112390272 A CN112390272 A CN 112390272A
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- water
- magnesium hydroxide
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- magnesium chloride
- flame retardant
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/14—Magnesium hydroxide
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a water-soluble magnesium hydroxide flame retardant and a preparation method thereof, which is characterized in that the mass concentration of a magnesium hydroxide aqueous solution is 5-40%. The fire retardant of the invention is pure water soluble, nearly neutral transparent clear liquid, easy to store and transport, safe and reliable to use, and has no secondary pollution. Can be used as a fire extinguishing fire retardant for removing electric fire, can also be used as a fire retardant additive for various fabrics, and can also be used as a fire retardant additive for various substances needing fire prevention and fire retardation, such as various furniture, plates, paper products and the like. Through professional detection, the flame retardant grade can reach the national standard GB8624B1 grade. The smoke yield of the paper products and the textiles treated by the method is 5-6 (%. min), which is greatly less than or equal to 750 (%. min) specified by the standard; the height (Fs) of the flame tip in 20S (seconds) is 30-32 mm which is far lower than the standard specification and is less than or equal to 150 mm.
Description
Technical Field
The invention belongs to an inorganic flame retardant or a fire extinguishing agent, and further relates to a magnesium hydroxide flame retardant. In particular to a water-soluble magnesium hydroxide flame retardant and a preparation method thereof.
Background
Magnesium hydroxide is currently widely used as an inorganic flame retardant. However, magnesium hydroxide belongs to a water-insoluble inorganic substance, needs deep processing and necessary chemical and physical means when used as a water-based flame retardant and fire extinguishing agent, has high cost, is difficult to operate, and has difficult stable control of quality. For example, Chinese patent 201610994235.6 discloses a preparation method of a flame retardant, which comprises grinding flame retardant components such as aluminum hydroxide and magnesium hydroxide together with small molecular water to 8000-10000 meshes. The grinding cost is huge, and the cost is high, so that the grinding method is difficult to popularize and apply. Further, as disclosed in "method for producing magnesium hydroxide for flame retardant" in chinese patent 200610042411.2, the final preparation product is magnesium hydroxide crystals insoluble in water and cannot be used as a water-soluble flame retardant directly. The inventors of the present invention have made extensive studies and experiments to provide a water-soluble magnesium hydroxide flame-retardant fire-retardant agent having excellent quality and low cost, and have made the object of the present invention.
Disclosure of Invention
The invention aims to overcome the defect that the magnesium hydroxide flame retardant is not easy to dissolve in water. Namely, a water-soluble magnesium hydroxide flame retardant and a method for producing the same.
The technical scheme of the invention is realized in such a way that the water-soluble magnesium hydroxide flame retardant is characterized in that the mass concentration of a magnesium hydroxide aqueous solution is 5-40%.
The preparation method of the water-soluble magnesium hydroxide fire retardant is characterized in that magnesium chloride is dissolved in water at normal temperature.
The beneficial technical effects of the invention are as follows: the fire retardant is pure water soluble, nearly neutral transparent clear liquid, easy to store and transport, safe and reliable to use and free of secondary pollution. Can be used as a fire extinguishing fire retardant for removing electric fire, can also be used as a fire retardant additive for various fabrics, and can also be used as a fire retardant additive for various substances needing fire prevention and fire retardation, such as various furniture, plates, paper products and the like. Through professional detection, the flame retardant grade can reach the national standard GB8624B1 grade. The smoke yield of the paper products and the textiles treated by the method is 5-6 (%. min), which is greatly less than or equal to 750 (%. min) specified by the standard; the height (Fs) of the flame tip in 20S (seconds) is 30-32 mm which is far lower than the standard specification and is less than or equal to 150 mm.
Detailed Description
Specific examples are given below to explain the present invention in detail.
Example 1
82 g of anhydrous magnesium chloride is dissolved in 950 ml of water at normal temperature to obtain a magnesium hydroxide aqueous solution with the mass concentration of 5%.
Example 2
164 g of anhydrous magnesium chloride is dissolved in 900 ml of water at normal temperature to obtain a magnesium hydroxide aqueous solution with the mass concentration of 10%.
Example 3
327 g of anhydrous magnesium chloride is dissolved in 800 ml of water at normal temperature to obtain a magnesium hydroxide aqueous solution with the mass concentration of 20%.
Example 4
490 g of anhydrous magnesium chloride was dissolved in 700 ml of water at room temperature to obtain an aqueous solution of magnesium hydroxide having a mass concentration of 30%.
Example 5
653 g of anhydrous magnesium chloride is dissolved in 600 ml of water at normal temperature to obtain the magnesium hydroxide aqueous solution with the mass concentration of 40 percent.
The anhydrous magnesium chloride in examples 1-5 was replaced with magnesium chloride hexahydrate. Become new examples 6-10.
The anhydrous magnesium chloride of examples 1-5 and the magnesium chloride hexahydrate of examples 6-10 were mixed in any proportion and directly added to water for dissolution.
Example 11
41 g of anhydrous magnesium chloride and 41 g of magnesium chloride hexahydrate are dissolved in 950 ml of water at normal temperature to obtain a magnesium hydroxide aqueous solution with the mass concentration of 5%.
Example 12
100 g of anhydrous magnesium chloride and 64 g of magnesium chloride hexahydrate are dissolved in 900 ml of water at normal temperature to obtain a magnesium hydroxide aqueous solution with the mass concentration of 10%.
Example 13
200 g of anhydrous magnesium chloride and 127 g of magnesium chloride hexahydrate are dissolved in 800 ml of water at normal temperature to obtain a magnesium hydroxide aqueous solution with the mass concentration of 20%.
Example 14
290 g of anhydrous magnesium chloride and 200 g of magnesium chloride hexahydrate are dissolved in 700 ml of water at normal temperature to obtain a magnesium hydroxide aqueous solution with the mass concentration of 30%.
Example 15
400 g of anhydrous magnesium chloride and 253 g of magnesium chloride hexahydrate are dissolved in 600 ml of water at normal temperature to obtain a magnesium hydroxide aqueous solution with the mass concentration of 40%.
The mass values of anhydrous magnesium chloride and magnesium chloride hexahydrate in examples 11-15 are fully interchangeable, and the interchange does not affect the final water solubility and fire-retardant fire-extinguishing effect of the solution.
The water is preferably treated deionized water.
Claims (6)
1. A water-soluble magnesium hydroxide flame retardant is characterized in that the mass concentration of a magnesium hydroxide aqueous solution is 5-40%.
2. A process for preparing water-soluble magnesium hydroxide flame-retarding agent features that magnesium chloride is dissolved in water at ordinary temp.
3. The method for producing a water-soluble magnesium hydroxide flame retardant according to claim 2, wherein the magnesium chloride is magnesium chloride hexahydrate and/or anhydrous magnesium chloride.
4. The method for producing a water-soluble magnesium hydroxide flame retardant according to claim 2, wherein the magnesium chloride is anhydrous magnesium chloride.
5. The method for producing a water-soluble magnesium hydroxide flame retardant according to claim 2, wherein the magnesium chloride is magnesium chloride hexahydrate.
6. The method for preparing a water-soluble magnesium hydroxide flame retardant according to claim 2, wherein the magnesium chloride is magnesium chloride hexahydrate and anhydrous magnesium chloride which are mixed in an arbitrary ratio and directly added to water to be dissolved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910812445.2A CN112390272A (en) | 2019-08-19 | 2019-08-19 | Water-soluble magnesium hydroxide fire retardant and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910812445.2A CN112390272A (en) | 2019-08-19 | 2019-08-19 | Water-soluble magnesium hydroxide fire retardant and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112390272A true CN112390272A (en) | 2021-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910812445.2A Pending CN112390272A (en) | 2019-08-19 | 2019-08-19 | Water-soluble magnesium hydroxide fire retardant and preparation method thereof |
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| CN (1) | CN112390272A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114832254A (en) * | 2022-05-20 | 2022-08-02 | 山东宙雨消防科技股份有限公司 | Application method of fire extinguishing charcoal without reburning |
| CN115893459A (en) * | 2022-12-20 | 2023-04-04 | 山东沃特斯德新材料科技有限公司 | Preparation method of multifunctional water-soluble nano magnesium hydroxide stock solution |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101723418A (en) * | 2009-12-22 | 2010-06-09 | 河北盛华化工有限公司 | Method for preparing ultra-fine magnesium hydroxide flame retardant by utilizing magnesium chloride |
| CN102260420A (en) * | 2011-05-25 | 2011-11-30 | 太原理工大学 | Preparation method of composite flame retardant |
| CN102502728A (en) * | 2011-10-12 | 2012-06-20 | 江苏艾特克阻燃材料有限公司 | Magnesium hydroxide flame retardant and preparation method thereof |
| CN103436269A (en) * | 2013-08-19 | 2013-12-11 | 太原理工大学 | Method for preparing flame retardant through coating carbon microsphere with magnesium hydroxide |
-
2019
- 2019-08-19 CN CN201910812445.2A patent/CN112390272A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101723418A (en) * | 2009-12-22 | 2010-06-09 | 河北盛华化工有限公司 | Method for preparing ultra-fine magnesium hydroxide flame retardant by utilizing magnesium chloride |
| CN102260420A (en) * | 2011-05-25 | 2011-11-30 | 太原理工大学 | Preparation method of composite flame retardant |
| CN102502728A (en) * | 2011-10-12 | 2012-06-20 | 江苏艾特克阻燃材料有限公司 | Magnesium hydroxide flame retardant and preparation method thereof |
| CN103436269A (en) * | 2013-08-19 | 2013-12-11 | 太原理工大学 | Method for preparing flame retardant through coating carbon microsphere with magnesium hydroxide |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114832254A (en) * | 2022-05-20 | 2022-08-02 | 山东宙雨消防科技股份有限公司 | Application method of fire extinguishing charcoal without reburning |
| CN115893459A (en) * | 2022-12-20 | 2023-04-04 | 山东沃特斯德新材料科技有限公司 | Preparation method of multifunctional water-soluble nano magnesium hydroxide stock solution |
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Application publication date: 20210223 |
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