CN104045102A - Production method for aluminum hydroxide - Google Patents
Production method for aluminum hydroxide Download PDFInfo
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- CN104045102A CN104045102A CN201410293813.4A CN201410293813A CN104045102A CN 104045102 A CN104045102 A CN 104045102A CN 201410293813 A CN201410293813 A CN 201410293813A CN 104045102 A CN104045102 A CN 104045102A
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- aluminum hydroxide
- sodium aluminate
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Abstract
The invention discloses a production method for aluminum hydroxide, relates to a production method for fine-grain aluminum hydroxide micro powder, and especially relates to fine-grain aluminum hydroxide with grain size D(50) of 3-5mu m. The production method is characterized in that a preparation process is as follows: preparing seed pulp by adopting sodium aluminate liquor and an aluminum sulfate neutralizational process, carrying out first-stage decomposition on the added sodium aluminate liquor, adding the aluminum hydroxide slurry prepared by the first-stage decomposition into the sodium aluminate liquor to carry out second-stage decomposition; and filtering and drying the obtained sodium aluminate slurry to obtain the fine-grain aluminum hydroxide with grain size D(50) of 3-5mu m. The fine-grain aluminum hydroxide with grain size D(50) of 3-5mu m obtained by adopting the method disclosed by the invention can satisfy filler performances of SMC (sheet molding compounds) and BMC (bulk molding compounds).
Description
Technical field
A production method for aluminium hydroxide, relates to a kind of fine-grained aluminum hydroxide micro mist, the production method of the fine-grained aluminum hydroxide that particularly granularity D (50) is 3-5um.
Background technology
On aluminium hydroxide market, granularity D (50) be 1-2um ultrafine aluminium hydroxide fire-retardant filler because of its particle superfine, have again fire-retardant, eliminate smoke, fill three large functions, non-secondary pollution in the time of burning, thereby in the advanced composite materials such as plastics, rubber, dose this product, not only make product there is flame retardancy and smoke suppression effect, and anti-electric leakage, resistance to electric arc, wear resisting property strengthen.The manufacture method of ultrafine aluminium hydroxide pure chemistry method is mainly that sodium aluminate and Tai-Ace S 150 neutralisation are prepared gel seed, and gained solution is not treated directly to add in sodium aluminate solution and decompose and make.
Bulk Molding Compound that D (50) is mainly used as SMC(Sheet Molding Compound for the fine-grained aluminum hydroxide of 3-5um---sheet molding compound) and BMC(Bulk Molding Compound---) filler, SMC and BMC are mainly used in carrier vehicle, construction work.In chemical anticorrosion, the industry-by-industry field such as electric.At present, world SMC and BMC output account for the 20-25% of whole glass reinforced plastic ultimate productions, still continue to increase with 10% speed every year.
Summary of the invention
Object of the present invention is exactly for the production method of a kind of D (50) for the fine-grained aluminum hydroxide of 3-5um is provided.
The object of the invention is to be achieved through the following technical solutions.
A kind of production method of aluminium hydroxide, it is characterized in that its preparation process is the seed slurry that adopts sodium aluminate solution and Tai-Ace S 150 neutralisation to prepare, add sodium aluminate solution to carry out one section of decomposition, one section of aluminum hydroxide slurry that decomposes preparation adds sodium aluminate solution to carry out two sections of decomposition, gained aluminum hydroxide slurry is dried after filtration, obtains the fine-grained aluminum hydroxide of granularity D (50) at 3-5um.
The production method of a kind of aluminium hydroxide of the present invention, is characterized in that a paragraph and two sections of decomposition course sodium aluminate solution liquid temps are controlled at 60-62 DEG C.
The production method of a kind of aluminium hydroxide of the present invention, while it is characterized in that one section decomposition, seed ratio is controlled at 17%-19%, decomposes 8-9 hour.
The production method of a kind of aluminium hydroxide of the present invention, while it is characterized in that its two sections decomposition, seed ratio is controlled at 1%-2%, decomposes 6-7 hour.
The production method of a kind of aluminium hydroxide of the present invention, can obtain the fine-grained aluminum hydroxide of granularity D (50) at 3-5um, can meet SMC and BMC carrier performance.
Embodiment
A kind of production method of aluminium hydroxide, its preparation process is the seed slurry that adopts sodium aluminate solution and Tai-Ace S 150 neutralisation to prepare, add sodium aluminate solution to carry out one section of decomposition, one section of aluminum hydroxide slurry that decomposes preparation adds sodium aluminate solution to carry out two sections of decomposition, gained aluminum hydroxide slurry is dried after filtration, obtains the fine-grained aluminum hydroxide of granularity D (50) at 3-5um.
Its specific operation process is: in reactor, add water, aluminium hydroxide and the industrial vitriol oil, controlling temperature is 80 DEG C, controls 1.5 hours reaction times, through stirring the Tai-Ace S 150 that makes alumina content (4 ± 0.2) % by liquid; Water, sodium aluminate solution, alum liquor are sent into high-speed stirring groove, mix, be incubated 24 hours, being translated into D50 is the aluminium hydroxide seed slurry of 1 um.The aluminium hydroxide seed that is 1 um using the D50 making is starched as crystal seed, join temperature and be the sodium aluminate solution of 60-62 DEG C, its seed is than controlling as 17%-19%, decompose 8-9 hour, carry out one section of decomposition, it is that the sodium aluminate solution of 60-62 DEG C carries out two sections of decomposition that the aluminum hydroxide slurry that one section of decomposition makes adds temperature again, two sections are decomposed seed ratio and are controlled at 1-2%, decompose 6-7 hour, the aluminum hydroxide slurry making, then dry through liquid-solid separating, washing that to obtain D (50) be 3-5um fine-grained aluminum hydroxide product.
Embodiment 1
1, the preparation of seed: add water, aluminium hydroxide and the industrial vitriol oil in reactor, controlling temperature is 80 DEG C, controls 1.5 hours reaction times, through stirring the alum liquor that makes alumina content 3.8%.Water, sodium aluminate solution, alum liquor are sent into high-speed stirring groove, mix, be incubated 24 hours, being translated into D50 is the aluminium hydroxide seed slurry of 0.95 um.
2, the production of fine-grained aluminum hydroxide:
The aluminium hydroxide seed that is 0.95 um using the D50 making is starched as crystal seed, joining temperature is 62 DEG C, alumina concentration is 111.18g/ l, ak is 1.61 sodium aluminate solution, its seed ratio is 17.5%, decompose 8 hours, carry out one section of decomposition, it is 62 DEG C that the aluminum hydroxide slurry that one section of decomposition makes adds temperature again, alumina concentration is 111.18g/ l, ak is that 1.61 sodium aluminate solution carries out two sections of decomposition, two sections are decomposed seed coefficient and are controlled at 1.65%, decompose 6 hours, making D50 is the concentrated and uniform aluminum hydroxide slurry of size-grade distribution of 4.815um, again through liquid-solid separating, washing, oven dry makes fine-grained aluminum hydroxide product.
Embodiment 2
1, the preparation of seed: add water, aluminium hydroxide and the industrial vitriol oil in reactor, controlling temperature is 80 DEG C, controls 1.5 hours reaction times, through stirring the alum liquor that makes alumina content 3.9%.Water, sodium aluminate solution, alum liquor are sent into high-speed stirring groove, mix, be incubated 24 hours, being translated into D50 is the aluminium hydroxide seed slurry of 1.05 um.
2, the production of fine-grained aluminum hydroxide:
The aluminium hydroxide seed that is 1.05 um using the D50 making is starched as crystal seed, joining temperature is 61 DEG C, alumina concentration is 112.66g/ l, ak is 1.56 sodium aluminate solution, its seed ratio is 18.2%, decompose 9 hours, carry out one section of decomposition, it is 61 DEG C that the aluminum hydroxide slurry that one section of decomposition makes adds temperature again, alumina concentration is 112.66g/ l, ak is that 1.56 sodium aluminate solution carries out two sections, two sections are decomposed seed coefficient and are controlled at 1.73%, decompose 6 hours, making D50 is the concentrated and uniform aluminum hydroxide slurry of size-grade distribution of 5.018um, again through liquid-solid separating, washing, oven dry makes fine-grained aluminum hydroxide product.
Embodiment 3
1, the preparation of seed: add water, aluminium hydroxide and the industrial vitriol oil in reactor, controlling temperature is 80 DEG C, controls 1.5 hours reaction times, through stirring the alum liquor that makes alumina content 3.85%.Water, sodium aluminate solution, alum liquor are sent into high-speed stirring groove, mix, be incubated 24 hours, being translated into D50 is the aluminium hydroxide seed slurry of 1.02 um.
2, the production of fine-grained aluminum hydroxide:
The aluminium hydroxide seed that is 1.02 um using the D50 making is starched as crystal seed, joining temperature is 60 DEG C, alumina concentration is 110.65g/ l, ak is 1.53 sodium aluminate solution, its seed ratio is 18.9%, decompose 8 hours, carry out one section of decomposition, it is 60 DEG C that the aluminum hydroxide slurry that one section of decomposition makes adds temperature again, alumina concentration is 11065g/ l, ak is that 1.53 sodium aluminate solution carries out two sections, two sections are decomposed seed coefficient and are controlled at 1.65%, decompose 6 hours, making D50 is the concentrated and uniform aluminum hydroxide slurry of size-grade distribution of 4.038um, again through liquid-solid separating, washing, oven dry makes fine-grained aluminum hydroxide product.
Claims (4)
1. the production method of an aluminium hydroxide, it is characterized in that its preparation process is the seed slurry that adopts sodium aluminate solution and Tai-Ace S 150 neutralisation to prepare, add sodium aluminate solution to carry out one section of decomposition, one section of aluminum hydroxide slurry that decomposes preparation adds sodium aluminate solution to carry out two sections of decomposition, gained aluminum hydroxide slurry is dried after filtration, obtains the fine-grained aluminum hydroxide of granularity D (50) at 3-5um.
2. the production method of a kind of aluminium hydroxide according to claim 1, is characterized in that a paragraph and two sections of decomposition course sodium aluminate solution liquid temps are controlled at 60-62 DEG C.
3. the production method of a kind of aluminium hydroxide according to claim 1, while it is characterized in that one section decomposition, seed ratio is controlled at 17%-19%, decomposes 8-9 hour.
4. the production method of a kind of aluminium hydroxide according to claim 1, while it is characterized in that its two sections decomposition, seed ratio is controlled at 1%-2%, decomposes 6-7 hour.
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| CN201410293813.4A CN104045102A (en) | 2014-06-27 | 2014-06-27 | Production method for aluminum hydroxide |
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| CN201410293813.4A CN104045102A (en) | 2014-06-27 | 2014-06-27 | Production method for aluminum hydroxide |
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| CN104045102A true CN104045102A (en) | 2014-09-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112028095A (en) * | 2020-08-12 | 2020-12-04 | 中铝山东有限公司 | Superfine aluminum hydroxide seed crystal and preparation method thereof, submicron aluminum hydroxide and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631786A (en) * | 2004-12-28 | 2005-06-29 | 中国铝业股份有限公司 | Process for producing sandy alumina by crystal seed decomposition |
| CN1911807A (en) * | 2006-08-25 | 2007-02-14 | 山东铝业股份有限公司 | Method for producing micropowder aluminium hydroxide by neutralization method |
| CN102502731A (en) * | 2011-10-13 | 2012-06-20 | 河津市晋铝大株化工有限公司 | Method for manufacturing superfine aluminum hydroxide micropowder |
-
2014
- 2014-06-27 CN CN201410293813.4A patent/CN104045102A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631786A (en) * | 2004-12-28 | 2005-06-29 | 中国铝业股份有限公司 | Process for producing sandy alumina by crystal seed decomposition |
| CN1911807A (en) * | 2006-08-25 | 2007-02-14 | 山东铝业股份有限公司 | Method for producing micropowder aluminium hydroxide by neutralization method |
| CN102502731A (en) * | 2011-10-13 | 2012-06-20 | 河津市晋铝大株化工有限公司 | Method for manufacturing superfine aluminum hydroxide micropowder |
Non-Patent Citations (4)
| Title |
|---|
| 杨长付等: ""两段种子分解法制备超细氢氧化铝微粉工艺研究"", 《中国粉体技术》, vol. 14, no. 5, 31 December 2008 (2008-12-31) * |
| 林齐等: ""二段种分法生产超细氢氧化铝微粉"", 《轻金属》, no. 10, 31 December 2002 (2002-12-31) * |
| 王建立等: ""种分法制备超细氢氧化铝过程中的粒度控制"", 《中国粉体技术》, vol. 13, 31 August 2007 (2007-08-31) * |
| 王建立等: ""种分法制备超细氢氧化铝过程中的粒度控制"", 《轻金属》, no. 3, 31 March 2011 (2011-03-31) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112028095A (en) * | 2020-08-12 | 2020-12-04 | 中铝山东有限公司 | Superfine aluminum hydroxide seed crystal and preparation method thereof, submicron aluminum hydroxide and preparation method and application thereof |
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Application publication date: 20140917 |