CN1057443A - The carbon dioxide process production technique of aluminium hydroxide gel series products - Google Patents
The carbon dioxide process production technique of aluminium hydroxide gel series products Download PDFInfo
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- CN1057443A CN1057443A CN 90105317 CN90105317A CN1057443A CN 1057443 A CN1057443 A CN 1057443A CN 90105317 CN90105317 CN 90105317 CN 90105317 A CN90105317 A CN 90105317A CN 1057443 A CN1057443 A CN 1057443A
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- temperature
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- rice
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Abstract
The CO of aluminium hydroxide gel series products
2The method production technique.The invention belongs to the production field of aluminium hydroxide chemical products.Be characterized in that the stirring velocity of carbonating operation is moderate, weathering process tube list, washing times is few, and non-environmental-pollution be the more important thing is not change equipment and flow process, by controlling each processing parameter, can produce the Al (OH) of multiple performance
3Gel.
Description
The invention belongs to the production technique of aluminium hydroxide chemical products.
The domestic production aluminum hydroxide gel is mainly with industrial Al(OH)
3Be raw material, adopt acid or the reppd method of alkali, its flow process complexity, regulation and control inconvenience, product is single, needs anticorrosion pressure-resistant equipment, industrial chemicals such as consumption acid or alkali, the difficult pollution of avoiding environment.
External relevant patent documentation GB1440194 has proposed with industrial Al(OH)
3The sodium aluminate solution that makes is made raw material, uses CO
2Method is produced the technology of pseudo-boehmite, and master operation is feedstock production, CO
2Become glue, aging, washing, liquid-solid separation and drying.The carbonating technology condition of this technology only can be produced a kind of pseudo-boehmite that is used to prepare alumina sol, and product is single, its weathering process complexity, washing times is many, bake out temperature is low, and especially carbonation apparatus requires 500-600 rev/min of stirring velocity, and industrial implementation and operation all have certain difficulty.
The objective of the invention is, providing a kind of is raw material with the sodium aluminate solution, with CO
2Become the glue method to produce the technology of aluminium hydroxide gel series products, the stirring velocity of this technology carbonation apparatus is moderate, and weathering process is simple, and washing times is few, the temperature height of drying course, and speed is fast, non-environmental-pollution.
Technology of the present invention is made raw material with sodium aluminate solution, with CO
2Method is produced Al(OH)
3Gel, by feedstock production, become glue, aging, washing, drying process to constitute, its technical characterstic is: because this technology relates to the production aluminium hydroxide gel series products, so various processing parameter span of control are wide, do not change equipment and flow process,, can produce multiple Al(OH) as long as change each processing parameter
3Gel, the Al of raw material sodium aluminate solution
2O
3Concentration range is the 15-75 grams per liter, and temperature controlling range is 20-60 ℃, and it becomes the CO of glue process
2The ventilation speed control is at 30-180 rice
3/ hour rice
3Solution, CO
2The concentration of gas is 35-45%, and the stirring velocity in the venting process is 30-100 rev/min, and as the terminal point that becomes the glue operation, the slurries behind the one-tenth glue wore out 1-6 hour down in 70-100 ℃ with mother liquor pH value 10.5-12.0.Capable more liquid-solid separation according to product requirement, can not worn out yet, and becomes glue rear slurry direct filtration to separate, and carries out drying after the pasty state aluminium glue washing after the separation, and material carries out comminution process and obtains the finished product after the oven dry.
Become in the glue process, stirring velocity is best with 40-50 rev/min.
For improving CO
2Utilization ratio becomes glue process CO
2Ventilation can adopt stepwise process, promptly in carbonation, proceed to middle after date, with CO
2The gas prompt drop hangs down 30-70%, is preferably 45-55%, still is controlled to the terminal point of glue operation with mother liquor pH value 10.5-12.0.
The temperature of charge of drying process is preferably 70-110 ℃.
The present invention becomes the stirring velocity of glue process moderate, is convenient to operation control, and aging process is simple, and washing times is few, and the speed of oven dry operation is fast, whole technology non-environmental-pollution.Main is that this technology can be produced aluminium hydroxide gel series products.The part A l(OH that the present invention produced)
3The physics-chem characteristic of gel series products is listed in the table below:
| Several prods physical chemistry fundamental characteristics | |||||
| NO | The bulk density gram per centimeter 3 | Pore volume milliliter/gram | Specific surface area rice 2/ gram | Crystalline phase | Na 2O ％ |
| 1 | 0.2±0.05 | ＞0.8 | ＞250 | α－ALOOH | 0.05～0.20 |
| 2 | 0.3±0.05 | ＞0.6 | ＞240 | 、、 | 0.05～0.20 |
| 3 | 0.4±0.05 | ＞0.45 | ＞240 | 、、 | 0.15～0.25 |
| 4 | 0.7±0.05 | ＞0.35 | ＞230 | 、、 | 0.20～0.30 |
| 5 | 0.9±0.05 | ＞0.3 | ＞230 | 、、 | 0.20～0.30 |
| 6 | 0.7±0.05 | ＞0.3 | ＞200 | β－AL(OH) 320～30％ | 0.20～0.30 |
| 7 | 0.8±0.05 | ＞0.3 | ＞200 | β－AL(OH) 340～50％ | 0.2～0.30 |
| 8 | 0.8±0.05 | ＞0.25 | ＞180 | β－AL(OH) 370～80％ | 0.2～0.30 |
Below in conjunction with embodiment, technological process of the present invention is described in detail.
Embodiment 1, accompanying drawing are the specific embodiment exemplary flow, and details are as follows: industrial sodium aluminate solution (refined liquid, Al in the storage tank (1)
2O
3Concentration 95～100 grams per liters, 80～90 ℃ of temperature), send into dilution trap (2), add deionized water and be diluted to Al
2O
3Concentration 20～30 grams per liters, outer wall trickle at dilution trap (2) makes the diluting soln temperature reduce to 25～35 ℃, then this solution is removed solid residue through deep bed filter (3), send into carbonic acid again and change into glue groove (4), with the CO of the concentration 35～45% of coming out from air water separator (5) and under meter (6)
2The gas low whipping speed is to be reacted into glue rapidly, CO in 44 ± 4 rev/mins the one-tenth glue groove (4)
2Feeding speed be 140～160 meters
3/ hour rice
3Solution, aeration time 10～20 minutes, or carbonating mid-term with CO
2It is about 50% that gas velocity reduces, and mother liquor pH value 10.5～12.0 is as the terminal point of carbonating operation.Become the later direct entrance pressure filters of slurries (7) of glue to carry out liquid-solid separation, or deliver to ageing tank (8) earlier and arrive 85-95 ℃, wear out and carry out liquid-solid separation after 1-2 hour again with steam heating.The reverse agitator treating of deionization that the solid usefulness temperature that separation obtains is 85-95 ℃ 2-3 time.A washings part is returned dilution trap (2) and is done towards rare water, and remaining washings and isolating mother liquor are sent the adjustment groove (9) of alumina producing flow process back to.Send into the rapid drying of reinforcement moisture eliminator (10) by the wet cake that pressure filter (7) unloads, interior temperature of charge 90-110 ℃ of moisture eliminator, dried material send Universalpulverizer (11), is crushed to by 60 mesh sieves, and then material is gone into dry powder finished bin (12) and packed.The basic physics-chem characteristic of this product is shown in the NO2 in the table.
Claims (11)
1, a kind ofly makes raw material, with CO with sodium aluminate solution
2Legal system is equipped with the technology of aluminium hydroxide gel series products, by feedstock production, become glue, aging, washing, dry, broken process to constitute, it is characterized in that:
A. the Al of sodium aluminate material solution
2O
3Concentration is that 15-75 grams per liter temperature is 20-60 ℃,
B. becoming glue process, CO
2Ventilation speed be 30-180 rice
3/ hour rice
3Solution, CO
2Gas concentration is 35-45%, and becoming the stirring velocity in the glue process is 20-100 rev/min,
C. become the slurries behind the glue to go liquid-solid separation down in aging 1-6 hour again in 700-100 ℃, also can not wear out, become the glue rear slurry directly to carry out liquid-solid separation.
2,, it is characterized in that into that stirring velocity is 40-50 rev/min in the glue process according to the described technology of claim 1.
3, according to claim 1 or 2 described technologies, it is characterized in that into glue process CO
2The feeding stepwise process, promptly after carbonation proceeds to mid-term, CO
2Gas feeding speed reduces 30-70%, preferably reduces 45-55%.
4, according to claim 1 or 2 described technologies, it is characterized in that: the Al of raw material sodium aluminate solution
2O
3Concentration is the 20-30 grams per liter, temperature 25-35 ℃, becomes glue process CO
2Gas feeding speed is 140-160 rice
3/ hour rice
3Solution in carbonation after mid-term, CO
2Gas feeding speed is reduced to original 45-45%, and becoming the aging temperature of glue rear slurry is 85-95 ℃, digestion time 1-2 hour.
5, according to claim 1 or 2 described technologies, it is characterized in that: the Al of raw material sodium aluminate solution
2O
3Concentration is the 40-50 grams per liter, temperature 30-40 ℃, becomes glue process CO
2Gas feeding speed is 160-180 rice
3/ hour rice
3Solution, aeration time 15-25 minute.
6, according to claim 1 or 2 described technologies, it is characterized in that: the Al of raw material sodium aluminate solution
2O
3Concentration is the 35-45 grams per liter, temperature 35-45 ℃, and CO
2Gas feeding speed is 30-50 rice
3/ hour rice
3Solution, aeration time are 60-70 minute.
7, according to claim 1 or 2 described technologies, the temperature of charge that it is characterized in that drying process is 70-110 ℃.
8, according to the described technology of claim 3, the temperature of charge that it is characterized in that drying process is 70-110 ℃.
9, according to the described technology of claim 4, the temperature of charge that it is characterized in that drying process is 70-110 ℃.
10, according to the described technology of claim 5, the temperature of charge that it is characterized in that drying process is 70-110 ℃.
11, according to the described technology of claim 6, the temperature of charge that it is characterized in that drying process is 70-110 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105317 CN1023391C (en) | 1990-06-19 | 1990-06-19 | Process for production of aluminium hydroxide gel series products by carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105317 CN1023391C (en) | 1990-06-19 | 1990-06-19 | Process for production of aluminium hydroxide gel series products by carbon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1057443A true CN1057443A (en) | 1992-01-01 |
| CN1023391C CN1023391C (en) | 1994-01-05 |
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ID=4879142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90105317 Expired - Fee Related CN1023391C (en) | 1990-06-19 | 1990-06-19 | Process for production of aluminium hydroxide gel series products by carbon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023391C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076318C (en) * | 1997-09-19 | 2001-12-19 | 中国科学院山西煤炭化学研究所 | Method for preparing active aluminum oxide by sodium aluminate carbonating process |
| CN1101340C (en) * | 1999-09-29 | 2003-02-12 | 中国石油化工集团公司 | Alumina and its preparing process and application |
| CN1305771C (en) * | 2005-12-22 | 2007-03-21 | 山东铝业股份有限公司 | Process for preparing Large ratio surface bata-type aluminium hydroxide |
| CN101418207B (en) * | 2008-11-21 | 2011-10-26 | 中国铝业股份有限公司 | Raw material of abrasive material polishing agent and preparation method thereof |
| CN102583466A (en) * | 2012-02-16 | 2012-07-18 | 山东晶鑫晶体科技有限公司 | High-purity aluminum oxide with small primary crystal and production method of high-purity aluminum oxide |
| CN102602968A (en) * | 2012-03-30 | 2012-07-25 | 山东晶鑫晶体科技有限公司 | Method for producing alumina powder used for plasma display panel (PDP) fluorescent powder |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092145C (en) * | 1998-12-30 | 2002-10-09 | 北京化工大学 | Preparation of superfine aluminium hydroxide |
| CN1113038C (en) * | 2000-11-09 | 2003-07-02 | 中国铝业股份有限公司 | Process for preparing beta-aluminium hydroxide |
-
1990
- 1990-06-19 CN CN 90105317 patent/CN1023391C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076318C (en) * | 1997-09-19 | 2001-12-19 | 中国科学院山西煤炭化学研究所 | Method for preparing active aluminum oxide by sodium aluminate carbonating process |
| CN1101340C (en) * | 1999-09-29 | 2003-02-12 | 中国石油化工集团公司 | Alumina and its preparing process and application |
| CN1305771C (en) * | 2005-12-22 | 2007-03-21 | 山东铝业股份有限公司 | Process for preparing Large ratio surface bata-type aluminium hydroxide |
| CN101418207B (en) * | 2008-11-21 | 2011-10-26 | 中国铝业股份有限公司 | Raw material of abrasive material polishing agent and preparation method thereof |
| CN102583466A (en) * | 2012-02-16 | 2012-07-18 | 山东晶鑫晶体科技有限公司 | High-purity aluminum oxide with small primary crystal and production method of high-purity aluminum oxide |
| CN102583466B (en) * | 2012-02-16 | 2014-06-11 | 山东晶鑫晶体科技有限公司 | High-purity aluminum oxide with small primary crystal and production method of high-purity aluminum oxide |
| CN102602968A (en) * | 2012-03-30 | 2012-07-25 | 山东晶鑫晶体科技有限公司 | Method for producing alumina powder used for plasma display panel (PDP) fluorescent powder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1023391C (en) | 1994-01-05 |
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