CN1023391C - Process for production of aluminium hydroxide gel series products by carbon - Google Patents
Process for production of aluminium hydroxide gel series products by carbon Download PDFInfo
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- CN1023391C CN1023391C CN 90105317 CN90105317A CN1023391C CN 1023391 C CN1023391 C CN 1023391C CN 90105317 CN90105317 CN 90105317 CN 90105317 A CN90105317 A CN 90105317A CN 1023391 C CN1023391 C CN 1023391C
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- glue
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- rice
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Abstract
The present invention relates to a technology for producing an aluminium hydroxide gel series of products with a CO2 method, which belongs to the production field of aluminium hydroxide chemical products. The present invention has the characteristics of moderate stirring speed of carbonating operation, simple ageing process, less washing times, no environmental pollution, and what's more, Al(OH)3 gel with various properties can be produced by controlling each technological parameter without changing equipment and process flows.
Description
The invention belongs to the production technique of aluminium hydroxide chemical products.
The domestic production aluminum hydroxide gel is mainly with industrial AI(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.
Patent documentation CN85100161 has proposed carbonating technology and has produced pseudo-boehmite.The carbonation process condition of this technology only limits the production pseudo-boehmite, and is not suitable for producing other aluminum hydroxide gels, especially in the carbonating critical process, does not provide into gluing equipment agitation condition or concrete parameter, CO
2It is constant all the time that gas feeds speed, also do not provide the pH value of operation terminal point, comprehensively above-mentioned, mixes quality product shakiness, CO when this technology is difficult to guarantee into glue between gas, liquid equably
2Utilization ratio is low, and industrial operation is difficult to control.
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 AI(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 kind of an AI(OH) as long as change each processing parameter
3Gel, the AI of raw material sodium aluminate solution
2O
3The dope scope 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/hour rice solution, CO
2The concentration of gas is 35-45%, stirring velocity in the venting process is 30-100 rev/min, with the terminal point of mother liquor pH value 10.5-12.0 as the operation of one-tenth glue, slurries behind the one-tenth glue wore out 1-6 hour down in 70-100 ℃, and capable more liquid-solid separation is according to product requirement, can not wear out yet, become glue rear slurry direct filtration to separate, carry out drying after the pasty state aluminium glue washing after the separation, oven dry back material carries out comminution process and obtains the finished product.
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 be adopted stepwise process, promptly proceeds to middle after date in carbonation, 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 I(OH that the present invention produced)
3The physics-chem characteristic of gel series products is listed in the table below: (seeing Table)
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, mother liquor pH value 10.5～12.0 terminal points as the 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 ℃, aging capable more liquid-solid separation after 1-2 hour with steam heating.The reverse agitator treating of deionized water 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.
Several prods physical chemistry fundamental characteristics
NO bulk density pore volume specific surface area crystalline phase Na
2
Gram per centimeter
3Milliliter/grammeter
2/ gram %
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）
30.20～0.30
20～30%
7 0.8±0.05 ＞0.3 ＞200 β-Al（OH）
30.2～0.30
40～50%
8 0.8±0.05 ＞0.25 ＞180 β-Al（OH）
30.2～0.3
70～80%
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 the Al of sodium aluminate material solution
2O
3Concentration is the 15-75 grams per liter, and temperature is 20-60 ℃, and the slurries behind the one-tenth glue wore out 1-6 hour down in 70-100 ℃, carried out liquid-solid separation again, also can not wear out, and becomes the glue rear slurry directly to carry out liquid-solid separation, it is characterized in that: becoming glue process, CO
2Ventilation speed be 30-180 rice
3/ hour rice
3Solution, CO
2Gas concentration is 35-45%, and stirring velocity is 20-100 rev/min in the one-tenth glue process, CO
2Gas feeds and adopts stepwise process, promptly proceeds to middle after date, CO in carbonation
2Gas feeding speed reduces 30-70%, with the terminal point of mother liquor pH value 10.5-12.0 as the operation of one-tenth glue.
According to the described technology of claim 1, it is characterized in that 2, stirring velocity is 40-50 rev/min in the one-tenth glue process.
According to claim 1 or 2 described technologies, it is characterized in that 3, described carbonation was carried out after mid-term, CO
2Gas feeding speed 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 drops to original 45-55%, 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 is 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 ℃.
According to the described technology of claim 4, it is characterized in that 9, the temperature of charge of drying process is 70-100 ℃.
10, according to the described technology of claim 5, its feature be that the temperature of charge of 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 CN1057443A (en) | 1992-01-01 |
| CN1023391C true CN1023391C (en) | 1994-01-05 |
Family
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 (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 |
Families Citing this family (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 |
| 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 |
-
1990
- 1990-06-19 CN CN 90105317 patent/CN1023391C/en not_active Expired - Fee Related
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1057443A (en) | 1992-01-01 |
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