CN103130251A - Preparation method of magnesium hydroxide fire retardant - Google Patents
Preparation method of magnesium hydroxide fire retardant Download PDFInfo
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- CN103130251A CN103130251A CN2011103848659A CN201110384865A CN103130251A CN 103130251 A CN103130251 A CN 103130251A CN 2011103848659 A CN2011103848659 A CN 2011103848659A CN 201110384865 A CN201110384865 A CN 201110384865A CN 103130251 A CN103130251 A CN 103130251A
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- magnesium hydroxide
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Abstract
The invention relates to a preparation method of magnesium hydroxide fire retardant, and belongs to the field of material chemistry. According to the characteristic that in the preparation process of the magnesium hydroxide fire retardant, magnesium sulfate and magnesium chloride serve as raw materials and magnesium hydroxide small crystal plates are coalesced to reduce surface energy self, before reaction, a mixture of cyclohexane monoterpene derivatives and dispersing agents is placed in a magnesium sulfate solution, then the dispersing agents are guided into the solution, precipitation is carried out, all products are washed and filtered, then first drying and second drying are carried out on the products to remove template substance, and hollow spherical magnesium hydroxide fire retardant is prepared. The hollow spherical magnesium hydroxide is added to high polymer materials, a fire retardant function is performed, and meanwhile sound-proof, substance bearing, slow-control releasing and other various effects are achieved due to the special structure of the hollow spherical magnesium hydroxide.
Description
[technical field]
The present invention relates to the materials chemistry field, particularly relate to a kind of preparation method of flame retardant of magnesium hydroxide.
[background technology]
Magnesium hydroxide can be widely used in fields such as fire retardant, wastewater treatment, air sweetening as a kind of important inorganic magnesium salt, is also simultaneously to produce magnesian important source material.Flame retardant of magnesium hydroxide is compared with similar inorganic combustion inhibitor, have good filling properties, safety non-toxic, stable performance, products production cost low, all do not contain toxic substance in the process of producing, use and discarding, and can also in and advantages such as the acidity that produces and corrosive gases in combustion processes, in natural and synthesized polymer material and obtain using more and more widely in industrial production and daily life.
At present, flame retardant of magnesium hydroxide commonly used is hexagonal plate, and along with the development in fire retardant related application field, common hexagonal plate magnesium hydroxide fire retardant can't satisfy the industrial production demand.The special appearance magnesium hydroxide adds in macromolecular material, except having flame retardant effect, can also bring into play the not available effect of coventional type magnesium hydroxide, is widely used in the fields such as electric wire, cable, household electrical appliances, engineering plastics, oil plant, fuel oil, building materials.The industrialization of ultra-fine, special appearance magnesium hydroxide preparation technology has become the focus that many advanced countries competitively develop, and the magnesium hydroxide of preparation special appearance always is one of most active research topic of flame retardant of magnesium hydroxide research field.
[summary of the invention]
Based on this, be necessary to provide a kind of preparation method of flame retardant of magnesium hydroxide.
A kind of preparation method of flame retardant of magnesium hydroxide comprises the steps:
Step 1: the solubility magnesium salts is configured to magnesium ion concentration greater than the aqueous solution of 0.5mol/L, and dispersion agent is added in the hexanaphthene monoterpene derivative be configured to mixture, described hexanaphthene monoterpene derivative is 500g/L～3000g/L with respect to the content of described dispersion agent;
Step 2: described mixture is added in the described aqueous solution, stir and disperse the rear mixing solutions that forms, described hexanaphthene monoterpene derivative is 10g/L～15g/L with respect to the content of the described aqueous solution;
Step 3: add hydroxide ion concentration to carry out precipitin reaction greater than the precipitation agent of 0.5mol/L in described the first mixing solutions, and form slip, and in described slip, the mol ratio of magnesium ion and hydroxide ion is 1: 2;
Step 4: after described slip is stirred ageing, filter successively and wash, after removing camphor, obtain described flame retardant of magnesium hydroxide, and described flame retardant of magnesium hydroxide being hollow ball-shape.
In a preferred embodiment, in step 1, but described solution magnesium salts is bischofite, magnesium chloride, sal epsom or magnesium nitrate.
In a preferred embodiment, in step 1, described dispersion agent is ethanol, ether or acetone.
In a preferred embodiment, in step 1, described hexanaphthene monoterpene derivative is 1,7,7-trimethylammonium, two ring [2,2,1] heptane-2-ketone or 3-bromo-1,7,7-trimethylammonium two ring [2,2,1] heptane-2-ketone or Isosorbide-5-Nitraes, 7,7-tetramethyl-[2,2,1] heptane-2-ketone.
In a preferred embodiment, in step 2, the speed of described stirring is 700～4000 rev/mins, and the time of described dispersion is 30 minutes～8 hours.
In a preferred embodiment, in step 3, described precipitation agent is ammoniacal liquor, sodium hydroxide solution, lithium hydroxide solution or potassium hydroxide solution.
In a preferred embodiment, in step 4, the time of described ageing is 0～120 minute.
In a preferred embodiment, in step 4, the step of described removal hexanaphthene monoterpene derivative comprises: the slip after described washing is placed in 50～200 ℃ dried 5～64 hours, then grind, cross 350 mesh sieves, again the slip that obtains is placed in 50～200 ℃ and continues oven dry after 5～64 hours, remove described hexanaphthene monoterpene derivative.
The present invention relates to a kind of manufacture method of hollow ball-shape magnesium hydroxide, belong to the materials chemistry field.Utilization is in preparing the process of flame retardant of magnesium hydroxide take sal epsom, magnesium chloride as raw material, coalescent characteristics can occur for reducing self surface in the little wafer of magnesium hydroxide, before reaction, hexanaphthene monoterpene derivative and mixture of dispersing agents is distributed in Adlerika.Then pass into precipitation agent and precipitate, products obtained therefrom carries out first drying and secondary drying and removes the template material through after washing, filtering, and prepares the hollow ball-shape flame retardant of magnesium hydroxide.The hollow ball-shape magnesium hydroxide, it adds in macromolecular material, in the performance fire retardation, also can the multi-effect such as put because of its special construction performance sound insulation, carrying material, slow controlled release.
[description of drawings]
Fig. 1 is preparation method's flow chart of steps of flame retardant of magnesium hydroxide provided by the invention;
Fig. 2, Fig. 3 are pattern SEM figure after the flame retardant of magnesium hydroxide fragmentation of hollow ball-shape of the present embodiment 1 preparation;
Fig. 4 is the flame retardant of magnesium hydroxide SEM figure of the hollow ball-shape of the present embodiment 2 preparations;
Fig. 5 is the flame retardant of magnesium hydroxide SEM figure of the hollow ball-shape of the present embodiment 3 preparations;
Fig. 6 is the flame retardant of magnesium hydroxide SEM figure of the hollow ball-shape of the present embodiment 4 preparations.
[embodiment] further illustrates below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the preparation method of the flame retardant of magnesium hydroxide of an embodiment comprises the steps:
Step S1 is configured to magnesium ion concentration greater than the aqueous solution of 0.5mol/L with the solubility magnesium salts, and dispersion agent is added in the hexanaphthene monoterpene derivative is configured to mixture, and the hexanaphthene monoterpene derivative is 500g/L～3000g/L with respect to the content of dispersion agent.But the solution magnesium salts is bischofite, magnesium chloride, sal epsom or magnesium nitrate, is preferably magnesium chloride.Dispersion agent can for ethanol, ether or acetone, be preferably acetone.In the present embodiment, adopt the EDTA method to demarcate magnesium ion concentration, can make magnesium ion concentration more accurate.
Step S2 adds mixture in the aqueous solution, stirs and disperses the rear mixing solutions that forms, and camphor is 10g/L～15g/L with respect to the content of the aqueous solution.In the present embodiment, the speed of stirring is 700～4000 rev/mins, and the time of described dispersion is 30 minutes～8 hours.In the present embodiment, use the intelligent reactor of IPC-3A as reaction unit.
Step S3 adds hydroxide ion concentration to carry out precipitin reaction greater than the precipitation agent of 0.5mol/L in mixing solutions, and forms slip, and in slip, the mol ratio of magnesium ion and hydroxide ion is 1: 2.In the present embodiment, precipitation agent is ammoniacal liquor, sodium hydroxide solution, lithium hydroxide solution or potassium hydroxide solution.
Step S4 after the slip ageing, filters successively and washs, and after removing camphor, obtain flame retardant of magnesium hydroxide, and flame retardant of magnesium hydroxide is hollow ball-shape.The step of removing camphor comprises: the slip after described washing is placed in 50～200 ℃ dried 5～64 hours, then grind, cross 350 mesh sieves, again the slip that obtains is placed in 50～200 ℃ and continues oven dry after 5～64 hours, remove described hexanaphthene monoterpene derivative.In the present embodiment, the time of ageing is 0～120 minute, preferably 60 minutes.The hollow ball-shape magnesium hydroxide of the present invention's preparation, pattern is regular, favorable dispersity.
Utilization of the present invention is in preparing the process of flame retardant of magnesium hydroxide take sal epsom, magnesium chloride as raw material, coalescent characteristics can occur for reducing self surface in the little wafer of magnesium hydroxide, before reaction, hexanaphthene monoterpene derivative and mixture of dispersing agents is distributed in Adlerika.Then pass into precipitation agent and precipitate, products obtained therefrom carries out first drying and secondary drying and removes the hexanaphthene monoterpene derivative through after washing, filtering, and prepares the hollow ball-shape flame retardant of magnesium hydroxide.The hollow ball-shape magnesium hydroxide, it adds in macromolecular material, in the performance fire retardation, also can the multi-effect such as put because of its special construction performance sound insulation, carrying material, slow controlled release.
Be below the specific embodiment part:
Sal epsom is configured to the aqueous solution, and making magnesium ion concentration by the demarcation of EDTA method is 2.4mol/L, and 10ml ethanol is added 20g1, is configured to mixture in 7,7-trimethylammonium, two ring [2,2,1] heptane-2-ketone; The magnesium ion aqueous solution of getting 300ml adds in the intelligent reactor of IPC-3A, then add mixture, and the stir speed (S.S.) with 2500 rev/mins is disperseed 40 minutes at the temperature of 35 ℃, formed mixing solutions; Carry out precipitin reaction take the speed of 2ml/min input concentration in mixing solutions as the ammoniacal liquor 112ml of 12.8mol/L, and form slip, and during to reaction end to add the mol ratio of magnesium ion in ammoniacal liquor total amount and liquid of the former end be 2: 1; Slip is filtered and uses deionized water wash, dry for the first time under 90 ℃ of conditions at last, drying time 24 hours, and then dry for the second time under 150 ℃ of conditions, drying time 24 hours, 1,7,7-trimethylammonium, two rings [2 have so just been removed, 2,1] heptane-2-ketone, obtain flame retardant of magnesium hydroxide, and flame retardant of magnesium hydroxide is hollow ball-shape.
As shown in Figures 2 and 3, the flame retardant of magnesium hydroxide pattern of the hollow ball-shape of the present embodiment preparation is regular, and favorable dispersity.
Embodiment 2
Magnesium chloride is configured to the aqueous solution, and making magnesium ion concentration by the demarcation of EDTA method is 2.4mol/L, and the 10ml ether is added 5g3-bromo-1,7, is configured to mixture in 7-trimethylammonium two ring [2,2,1] heptane-2-ketone; The magnesium ion aqueous solution of getting 300ml adds in the intelligent reactor of IPC-3A, then add mixture, and the stir speed (S.S.) with 700 rev/mins is disperseed 30 minutes at the temperature of 35 ℃, formed mixing solutions; Carry out precipitin reaction take the speed of 2ml/min input concentration in mixing solutions as the sodium hydroxide 112ml of 12.8mol/L, and form slip, and in slip, the mol ratio of magnesium ion and hydroxide ion is 1: 2; Slurry filtration is also used deionized water wash, dry for the first time under 90 ℃ of conditions at last, drying time 24 hours, and then dry for the second time under 150 ℃ of conditions, drying time 24 hours, removed 3-bromo-1,7,7-trimethylammonium two rings [2,2,1] heptane-2-ketone, obtain flame retardant of magnesium hydroxide, and flame retardant of magnesium hydroxide is hollow ball-shape.
As shown in Figure 4, the flame retardant of magnesium hydroxide pattern of the hollow ball-shape of the present embodiment preparation is regular, and favorable dispersity.
Embodiment 3
Magnesium nitrate is configured to the aqueous solution, and making magnesium ion concentration by the demarcation of EDTA method is 2.4mol/L, and 10ml acetone is added 30g1, is configured to mixture in 4,7,7-tetramethyl-[2,2,1] heptane-2-ketone; The magnesium ion aqueous solution of getting 300ml adds in the intelligent reactor of IPC-3A, then add mixture, and the stir speed (S.S.) with 4000 rev/mins is disperseed 8 hours at the temperature of 35 ℃, formed mixing solutions; Carry out precipitin reaction take the speed of 2ml/min input concentration in mixing solutions as the lithium hydroxide 112ml of 12.8mol/L, and form slip, and in slip, the mol ratio of magnesium ion and hydroxide ion is 1: 2; Deionized water wash is filtered and used to the slip ageing after 10 minutes, successively, dry for the first time under 90 ℃ of conditions at last, drying time 24 hours, and then dry for the second time drying time 24 hours under 150 ℃ of conditions, removed 1,4,7,7-tetramethyl-[2,2,1] heptane-2-ketone, obtain flame retardant of magnesium hydroxide, and flame retardant of magnesium hydroxide is hollow ball-shape.
As shown in Figure 5, the flame retardant of magnesium hydroxide pattern of the hollow ball-shape of the present embodiment preparation is regular, and favorable dispersity.
Embodiment 4
Bischofite is configured to the aqueous solution, and making magnesium ion concentration by the demarcation of EDTA method is 2.4mol/L, and 10ml ethanol is added 30g1, is configured to mixture in 4,7,7-tetramethyl-[2,2,1] heptane-2-ketone; The magnesium ion aqueous solution of getting 300ml adds in the intelligent reactor of IPC-3A, then add mixture, and the stir speed (S.S.) with 2500rpm is disperseed 40 minutes at the temperature of 35 ℃, formed mixing solutions; Carry out precipitin reaction take the speed of 2ml/min input concentration in mixing solutions as the potassium hydroxide 112ml of 12.8mol/L, and form slip, and in slip, the mol ratio of magnesium ion and hydroxide ion is 1: 2; Deionized water wash is filtered and used to the slip ageing after 120 minutes, successively, dry for the first time under 90 ℃ of conditions at last, drying time 24 hours, and then dry for the second time drying time 24 hours under 150 ℃ of conditions, removed 1,4,7,7-tetramethyl-[2,2,1] heptane-2-ketone, obtain flame retardant of magnesium hydroxide, and flame retardant of magnesium hydroxide is hollow ball-shape.
As shown in Figure 6, the flame retardant of magnesium hydroxide pattern of the hollow ball-shape of the present embodiment preparation is regular, and favorable dispersity.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.Should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. the preparation method of a flame retardant of magnesium hydroxide, is characterized in that, comprises the steps:
Step 1: the solubility magnesium salts is configured to magnesium ion concentration greater than the aqueous solution of 0.5mol/L, and dispersion agent is added in the hexanaphthene monoterpene derivative be configured to mixture, described hexanaphthene monoterpene derivative is 500g/L～3000g/L with respect to the content of described dispersion agent;
Step 2: described mixture is added in the described aqueous solution, form mixing solutions after dispersed with stirring, described hexanaphthene monoterpene derivative is 10g/L～15g/L with respect to the content of the described aqueous solution;
Step 3: add hydroxide ion concentration to carry out precipitin reaction greater than the precipitation agent of 0.5mol/L in described mixing solutions, and form slip, and in described slip, the mol ratio of magnesium ion and hydroxide ion is 1: 2;
Step 4: after described slip ageing, filter successively and wash, after removing the hexanaphthene monoterpene derivative, obtain described flame retardant of magnesium hydroxide, and described flame retardant of magnesium hydroxide being hollow ball-shape.
2. the preparation method of flame retardant of magnesium hydroxide according to claim 1, is characterized in that, in step 1, but described solution magnesium salts is bischofite, magnesium chloride, sal epsom or magnesium nitrate.
3. the preparation method of flame retardant of magnesium hydroxide according to claim 1, is characterized in that, in step 1, described dispersion agent is ethanol, ether or acetone.
4. the preparation method of flame retardant of magnesium hydroxide according to claim 1, is characterized in that, in step 1, described hexanaphthene monoterpene derivative is 1,7,7-trimethylammonium, two rings [2,2,1] heptane-2-ketone or 3-bromo-1,7,7-trimethylammonium two ring [2,2,1] heptane-2-ketone or 1,4,7,7-tetramethyl-[2,2,1] heptane-2-ketone.
5. the preparation method of flame retardant of magnesium hydroxide according to claim 1, is characterized in that, in step 2, the speed of described stirring is 700～4000 rev/mins, and the time of described dispersed with stirring is 30 minutes～8 hours.
6. the preparation method of flame retardant of magnesium hydroxide according to claim 1, is characterized in that, in step 3, described precipitation agent is ammoniacal liquor, sodium hydroxide solution, lithium hydroxide solution or potassium hydroxide solution.
7. the preparation method of flame retardant of magnesium hydroxide according to claim 1, is characterized in that, in step 4, the time of described ageing is 0～120 minute.
8. the preparation method of flame retardant of magnesium hydroxide according to claim 1, it is characterized in that, in step 4, the step of described removal hexanaphthene monoterpene derivative comprises: the slip after described washing is placed in 50～200 ℃ dried 5～64 hours, then grind, cross 350 mesh sieves, again the slip that obtains is placed in 50～200 ℃ and continues oven dry after 5～64 hours, remove described hexanaphthene monoterpene derivative.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107055578A (en) * | 2017-03-29 | 2017-08-18 | 河南师范大学 | A kind of preparation method of magnesium hydroxide ghost micro Nano material |
| CN107522903A (en) * | 2017-08-07 | 2017-12-29 | 湖州同泰新材料有限公司 | A kind of preparation method of flame retardant of magnesium hydroxide |
| CN115197500A (en) * | 2022-08-22 | 2022-10-18 | 江苏金发科技新材料有限公司 | Weather-resistant flame-retardant polypropylene composition and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012382A (en) * | 2007-01-31 | 2007-08-08 | 中北大学 | Method of preparing high-purity high-dispersion magnesium hydroxide fire retardant |
| WO2007117841A2 (en) * | 2006-03-31 | 2007-10-18 | Albemarle Corporation | Magnesium hydroxide with improved compounding and viscosity performance |
| CN101475197A (en) * | 2009-01-09 | 2009-07-08 | 中国科学院青海盐湖研究所 | Method for preparing ultra-fine high dispersing magnesium hydrate flame retardant from saline lake bittern or bischofite |
| KR20110045261A (en) * | 2009-10-26 | 2011-05-04 | 한국세라믹기술원 | Preparation of magnesium hydroxide and magnesium hydroxide colloid, flame retardant compositions, flame retardant coatings, and flame retardant fibers including the same |
-
2011
- 2011-11-22 CN CN201110384865.9A patent/CN103130251B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007117841A2 (en) * | 2006-03-31 | 2007-10-18 | Albemarle Corporation | Magnesium hydroxide with improved compounding and viscosity performance |
| CN101012382A (en) * | 2007-01-31 | 2007-08-08 | 中北大学 | Method of preparing high-purity high-dispersion magnesium hydroxide fire retardant |
| CN101475197A (en) * | 2009-01-09 | 2009-07-08 | 中国科学院青海盐湖研究所 | Method for preparing ultra-fine high dispersing magnesium hydrate flame retardant from saline lake bittern or bischofite |
| KR20110045261A (en) * | 2009-10-26 | 2011-05-04 | 한국세라믹기술원 | Preparation of magnesium hydroxide and magnesium hydroxide colloid, flame retardant compositions, flame retardant coatings, and flame retardant fibers including the same |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107055578A (en) * | 2017-03-29 | 2017-08-18 | 河南师范大学 | A kind of preparation method of magnesium hydroxide ghost micro Nano material |
| CN107055578B (en) * | 2017-03-29 | 2018-09-11 | 河南师范大学 | A kind of preparation method of magnesium hydroxide ghost micro Nano material |
| CN107522903A (en) * | 2017-08-07 | 2017-12-29 | 湖州同泰新材料有限公司 | A kind of preparation method of flame retardant of magnesium hydroxide |
| CN115197500A (en) * | 2022-08-22 | 2022-10-18 | 江苏金发科技新材料有限公司 | Weather-resistant flame-retardant polypropylene composition and preparation method and application thereof |
| CN115197500B (en) * | 2022-08-22 | 2023-08-11 | 江苏金发科技新材料有限公司 | Weather-resistant flame-retardant polypropylene composition and preparation method and application thereof |
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