CN100378000C - Method for producing micropowder aluminium hydroxide by neutralization method - Google Patents
Method for producing micropowder aluminium hydroxide by neutralization method Download PDFInfo
- Publication number
- CN100378000C CN100378000C CNB2006100685767A CN200610068576A CN100378000C CN 100378000 C CN100378000 C CN 100378000C CN B2006100685767 A CNB2006100685767 A CN B2006100685767A CN 200610068576 A CN200610068576 A CN 200610068576A CN 100378000 C CN100378000 C CN 100378000C
- Authority
- CN
- China
- Prior art keywords
- aluminium hydroxide
- sodium aluminate
- seed
- aluminate solution
- hydroxide micropowder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000006386 neutralization reaction Methods 0.000 title claims abstract description 24
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 title claims description 31
- 229910021502 aluminium hydroxide Inorganic materials 0.000 title claims description 31
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 31
- 238000000926 separation method Methods 0.000 claims abstract description 14
- 239000007787 solid Substances 0.000 claims abstract description 14
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 13
- 238000005406 washing Methods 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims abstract description 12
- 230000007935 neutral effect Effects 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 39
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 30
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- 229940037003 alum Drugs 0.000 claims description 7
- 239000003929 acidic solution Substances 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 5
- 239000003518 caustics Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 6
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 abstract 3
- 239000007788 liquid Substances 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000009776 industrial production Methods 0.000 abstract 1
- 230000003472 neutralizing effect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 15
- 239000004615 ingredient Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 238000005245 sintering Methods 0.000 description 9
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 239000013078 crystal Substances 0.000 description 4
- 238000009837 dry grinding Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000005432 seston Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Abstract
The present invention relates to neutralizing process of producing fine aluminum hydroxide powder. The production process includes the neutralization reaction between sodium aluminate solution and acid solution to obtain neutral seed liquid of pH 6-8; adding the seed liquid into sodium aluminate solution in the seed coefficient of 0.5-2.0 % for seed separation of 4-8 at decomposition rate of 50-55 %; solid-liquid separation of the decomposed slurry, washing and drying the solid, and airflow depolymerization to obtain fine aluminum hydroxide powder. The production process is simple, easy to control and suitable for industrial production, and the obtained fine aluminum hydroxide powder has high purity, high sphericity, concentrated grain size distribution, low oil absorbing rate, low conductivity and high quality.
Description
Technical field
The present invention relates to a kind of neutralisation and produce the method for aluminium hydroxide micropowder, belong to the synthetic technology of aluminium hydroxide micropowder.
Background technology
The existing aluminium hydroxide micropowder method of producing mainly prepares crystal seed by machinery dry grinding method and mechanical process, adopts the seed addition decomposition method then.One, mechanical dry grinding method flow process is extremely simple, but has unfavorable factors such as granular size is irregular, particle surface is extremely coarse, foreign matter content height, now is eliminated gradually; Second method has just partly been eliminated the unfavorable factor of mechanical dry grinding method.Chinese patent, application number 200410049908.8, proposed " a kind of method of producing the low conductivity aluminium hydroxide micropowder ", the refined sodium aluminate solution desiliconization has been purified, made siliceous modulus more than 600, seston is less than 0.02%, add the crystal seed coefficient and be 3～12% crystal seed, under 50～73 ℃ of conditions, decomposed 3～8 hours, after filtration, washing, oven dry finally obtain the aluminium hydroxide micropowder product of low conductivity, its specific conductivity≤140 μ s/cm, meta particle diameter are 0.4～3 μ m.Because used crystal seed adopts the sand-blast preparation, thereby there are problems such as particle surface is coarse, size-grade distribution is wide, product foreign matter content height in the aluminium hydroxide micropowder product that causes preparing.
Summary of the invention
The object of the present invention is to provide a kind of neutralisation to produce the method for aluminium hydroxide micropowder, the technological process of production is simple, and operating process is easy to control, and the aluminium hydroxide micropowder purity height of acquisition, sphericity height, size-grade distribution are concentrated, oil number is low, specific conductivity is low.
Neutralisation of the present invention is produced the method for aluminium hydroxide micropowder, carry out neutralization reaction by sodium aluminate solution and acidic solution, acquisition pH value is 6～8 near neutral seed liquor, is 0.5～2.0% with the seed coefficient, slowly adds sodium aluminate solution in seed liquor, planting the branch time is 4～8 hours, rate of decomposition is controlled at 50～55%, gained is decomposed slurries carry out liquid-solid separation, and solid is through washing and oven dry, pass through the air-flow depolymerization again, obtain aluminium hydroxide micropowder.
The present invention obtains seed liquor by neutralization reaction, compares with solid-state seed, need not to grind, and does not also have development impurity and brings into, has improved the purity of aluminium hydroxide micropowder, the sphericity height, and size-grade distribution is concentrated, and oil number is low, and specific conductivity is low.And slowly add sodium aluminate solution, can add speed by motorized valve and under meter control sodium aluminate solution, sustainable 3～5 hours of joining day, thus crystalline growth velocity is suitable, reduces agglomeration, good sphericity.
Among the present invention, control condition is as follows preferably:
The temperature of reaction of sodium aluminate solution and acidic solution is controlled to be 20～90 ℃;
Sodium aluminate solution caustic ratio α k=1.4～1.6, alumina content is 95～110g/L;
Acidic solution is acetic acid solution or alum liquor, and the weight concentration of acetic acid solution is controlled to be 10～20%, and the weight content of aluminum oxide is controlled to be 7.5～8.3% in the alum liquor.
The air-flow depolymerization is by reinforced injector by pressurized gas (air or other gas), the powder raw material that self-feeder is got off, be generally below 60 orders, evenly enter depolymerizer continuously, pressurized gas is by the outdoor nozzle that encloses of depolymerization simultaneously, produce high velocity air, spray into the depolymerization chamber, make the mutual collision friction of gas particles and reach the depolymerization purpose, the ultrafine particle after the depolymerization, major part is collected in the cyclonic separation bottom, and gas then sees through filter bag and discharges.It is the depolymerization of comminution by gas stream mill that the air-flow depolymerization can be used the airflow milling depolymerization, and the comminution by gas stream mill can directly be bought for sophisticated existing installation,
The aluminium hydroxide micropowder product purity that is made by preparation method of the present invention is greater than 99.7%, meta particle diameter 0.1～2.0 μ m, and size-grade distribution is concentrated, particle sphericity height, oil number is not more than 40mL/100g, and specific conductivity is not more than 70 μ s/cm.
Neutralisation of the present invention is produced the method for aluminium hydroxide micropowder, the technological process of production is simple, and operating process is easy to control, is convenient to industrializing implementation, and the aluminium hydroxide micropowder purity height that obtains, sphericity height, size-grade distribution are concentrated, oil number is low, specific conductivity is low, the quality product height.
Description of drawings
Fig. 1, process flow diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1
Soda-lime sintering process gained refined sodium aluminate solution, its composition is alumina content 100g/L, α k=1.44, under 25 ℃, carry out with weight concentration be that 15% acetic acid solution carries out neutralization reaction, acquisition pH value is 7 seed liquor, with the seed coefficient is 0.5%, slowly adds sodium aluminate solution and decomposes, and the resolving time is 7 hours, rate of decomposition 54%, decompose slurries and carry out liquid-solid separation, washing and oven dry, air-flow depolymerization pressure 0.6Mpa, obtaining aluminium hydroxide micropowder purity is 99.71%, 1.13 microns of meta particle diameters, specific conductivity 47 μ s/cm, oil number 35mL/100g, its chemical ingredients sees Table 1.
Embodiment 2
Soda-lime sintering process gained refined sodium aluminate solution, its composition is alumina content 104g/L, α k=1.46, under 30 ℃, carry out with weight concentration be that 12% acetic acid solution carries out neutralization reaction, acquisition pH value is 6.6 seed liquor, with the seed coefficient is 0.5%, slowly adds sodium aluminate solution and decomposes, and the resolving time is 8 hours, rate of decomposition 55%, decompose slurries and carry out liquid-solid separation, washing and oven dry, air-flow depolymerization pressure 0.6Mpa, obtaining aluminium hydroxide micropowder purity is 99.73%, 1.10 microns of meta particle diameters, specific conductivity 55 μ s/cm, oil number 35ml/100g, its chemical ingredients sees Table 1.
Embodiment 3
Soda-lime sintering process gained refined sodium aluminate solution, its composition is alumina content 98g/L, α k=1.52, under 30 ℃, carry out with weight concentration be that 18% acetic acid solution carries out neutralization reaction, acquisition pH value is 7.5 seed liquor, with the seed coefficient is 0.5%, slowly adds sodium aluminate solution and decomposes, and the resolving time is 8 hours, rate of decomposition 55%, decompose slurries and carry out liquid-solid separation, washing and oven dry, air-flow depolymerization pressure 0.8Mpa, obtaining aluminium hydroxide micropowder purity is 99.74%, 1.05 microns of meta particle diameters, specific conductivity 35 μ s/cm, oil number 36mL/100g, its chemical ingredients sees Table 1.
Embodiment 4
Soda-lime sintering process gained refined sodium aluminate solution, its composition is alumina content 100g/L, α k=1.48, under 30 ℃, carry out with weight concentration be that 16% acetic acid solution carries out neutralization reaction, acquisition pH value is 7.2 seed liquor, with the seed coefficient is 1.0%, slowly adds sodium aluminate solution and decomposes, and the resolving time is 8 hours, rate of decomposition 56%, decompose slurries and carry out liquid-solid separation, washing and oven dry, air-flow depolymerization pressure 0.6Mpa, obtaining aluminium hydroxide micropowder purity is 99.74%, 0.68 micron of meta particle diameter, specific conductivity 58 μ s/cm, oil number 40mL/100g, its chemical ingredients sees Table 1.
Embodiment 5
Soda-lime sintering process gained refined sodium aluminate solution, its composition is alumina content 105g/L, α k=1.53, under 30 ℃, carry out with weight concentration be that 13% acetic acid solution carries out neutralization reaction, acquisition pH value is 6.8 seed liquor, with the seed coefficient is 1.0%, slowly adds sodium aluminate solution and decomposes, and the resolving time is 6 hours, rate of decomposition 55%, decompose slurries and carry out liquid-solid separation, washing and oven dry, air-flow depolymerization pressure 0.8Mpa, obtaining aluminium hydroxide micropowder purity is 99.75%, 0.65 micron of meta particle diameter, specific conductivity 51 μ s/cm, oil number 40mL/100g, its chemical ingredients sees Table 1.
Embodiment 6
Soda-lime sintering process gained refined sodium aluminate solution, its composition is alumina content 100g/L, α k=1.49, under 35 ℃, carry out with weight concentration be that 14% acetic acid solution carries out neutralization reaction, acquisition pH value is 7.2 seed liquor, with the seed coefficient is 1.0%, slowly adds sodium aluminate solution and decomposes, and the resolving time is 7 hours, rate of decomposition 55%, decompose slurries and carry out liquid-solid separation, washing and oven dry, air-flow depolymerization pressure 0.8Mpa, obtaining aluminium hydroxide micropowder purity is 99.78%, 0.66 micron of meta particle diameter, specific conductivity 24 μ s/cm, oil number 40mL/100g, its chemical ingredients sees Table 1.
Embodiment 7
Soda-lime sintering process gained refined sodium aluminate solution, its composition is alumina content 100g/L, α k=1.44, under 40 ℃, carry out weight content with aluminum oxide and be 8% alum liquor and carry out neutralization reaction, acquisition pH value is 7 seed liquor, with the seed coefficient is 2.0%, slowly add sodium aluminate solution and decompose, the resolving time is 5 hours, rate of decomposition 60%, decompose slurries and carry out liquid-solid separation, washing and oven dry, air-flow depolymerization pressure 0.8Mpa, obtaining aluminium hydroxide micropowder purity is 99.75%, 0.24 micron of meta particle diameter, specific conductivity 37 μ s/cm, its chemical ingredients sees Table 1.
Embodiment 8
Soda-lime sintering process gained refined sodium aluminate solution, its composition is alumina content 100g/L, α k=1.44, under 30 ℃, carry out weight content with aluminum oxide and be 7.6% alum liquor and carry out neutralization reaction, acquisition pH value is 6.5 seed liquor, with the seed coefficient is 2.0%, slowly add sodium aluminate solution and decompose, the resolving time is 6 hours, rate of decomposition 62%, decompose slurries and carry out liquid-solid separation, washing and oven dry, air-flow depolymerization pressure 0.8Mpa, obtaining aluminium hydroxide micropowder purity is 99.75%, 0.15 micron of meta particle diameter, specific conductivity 17 μ s/cm, its chemical ingredients sees Table 1.
Embodiment 9
Soda-lime sintering process gained refined sodium aluminate solution, its composition is alumina content 105g/L, α k1.54, under 30 ℃, carry out weight content with aluminum oxide and be 8.2% alum liquor and carry out neutralization reaction, acquisition pH value is 7.7 seed liquor, with the seed coefficient is 2.0%, slowly add sodium aluminate solution and decompose, the resolving time is 8 hours, rate of decomposition 65%, decompose slurries and carry out liquid-solid separation, washing and oven dry, air-flow depolymerization pressure 0.8Mpa, obtaining aluminium hydroxide micropowder purity is 99.75%, 0.13 micron of meta particle diameter, specific conductivity 8 μ s/cm, its chemical ingredients sees Table 1.
Table 1, product analysis be table as a result
Claims (5)
1. a neutralisation is produced the method for aluminium hydroxide micropowder, it is characterized in that carrying out neutralization reaction by sodium aluminate solution and acidic solution, acquisition pH value is 6～8 near neutral seed liquor, with the seed coefficient is 0.5～2.0%, in seed liquor, slowly add sodium aluminate solution, planting the branch time is 4～8 hours, rate of decomposition is controlled at 50～55%, gained is decomposed slurries carry out liquid-solid separation, solid is through washing and oven dry, pass through the air-flow depolymerization again, obtain aluminium hydroxide micropowder, wherein acidic solution is acetic acid solution or alum liquor.
2. neutralisation according to claim 1 is produced the method for aluminium hydroxide micropowder, and the temperature of reaction that it is characterized in that sodium aluminate solution and acidic solution is 20～90 ℃.
3. neutralisation according to claim 1 is produced the method for aluminium hydroxide micropowder, it is characterized in that sodium aluminate solution caustic ratio α k=1.4～1.6, and alumina content is 95～110g/L.
4. neutralisation according to claim 1 is produced the method for aluminium hydroxide micropowder, and the weight concentration that it is characterized in that acetic acid solution is 10～20%.
5. neutralisation according to claim 1 is produced the method for aluminium hydroxide micropowder, and the weight content that it is characterized in that aluminum oxide in the alum liquor is 7.5～8.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100685767A CN100378000C (en) | 2006-08-25 | 2006-08-25 | Method for producing micropowder aluminium hydroxide by neutralization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100685767A CN100378000C (en) | 2006-08-25 | 2006-08-25 | Method for producing micropowder aluminium hydroxide by neutralization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1911807A CN1911807A (en) | 2007-02-14 |
| CN100378000C true CN100378000C (en) | 2008-04-02 |
Family
ID=37720906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100685767A Active CN100378000C (en) | 2006-08-25 | 2006-08-25 | Method for producing micropowder aluminium hydroxide by neutralization method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100378000C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730728A (en) * | 2012-06-18 | 2012-10-17 | 河南神火新材料有限公司 | Preparation method for aluminum hydroxide used for filling material |
| CN104045102A (en) * | 2014-06-27 | 2014-09-17 | 中国铝业股份有限公司 | Production method for aluminum hydroxide |
| CN104045100A (en) * | 2014-06-27 | 2014-09-17 | 中国铝业股份有限公司 | Preparation method of aluminum hydroxide |
| CN110372021A (en) * | 2019-06-13 | 2019-10-25 | 山东泰星新材料股份有限公司 | A kind of preparation method and application of electronic circuit board or electrician's fire retardant aluminium hydroxide |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06316647A (en) * | 1993-03-09 | 1994-11-15 | Sumitomo Chem Co Ltd | Aluminum hydroxide for packing resin and its production |
| JPH08325011A (en) * | 1995-05-26 | 1996-12-10 | Showa Denko Kk | Aluminum hydroxide and its production |
| CN1287973A (en) * | 2000-11-01 | 2001-03-21 | 中国长城铝业中州铝厂 | Method for preparing super fine aluminium hydroxide |
| CN1433964A (en) * | 2003-03-12 | 2003-08-06 | 湖南化工研究院 | Process for preparing superfine aluminium hydroxide |
| CN1803622A (en) * | 2006-01-23 | 2006-07-19 | 山东铝业股份有限公司 | Method for preparing aluminium hydroxide micropowder |
-
2006
- 2006-08-25 CN CNB2006100685767A patent/CN100378000C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06316647A (en) * | 1993-03-09 | 1994-11-15 | Sumitomo Chem Co Ltd | Aluminum hydroxide for packing resin and its production |
| JPH08325011A (en) * | 1995-05-26 | 1996-12-10 | Showa Denko Kk | Aluminum hydroxide and its production |
| CN1287973A (en) * | 2000-11-01 | 2001-03-21 | 中国长城铝业中州铝厂 | Method for preparing super fine aluminium hydroxide |
| CN1433964A (en) * | 2003-03-12 | 2003-08-06 | 湖南化工研究院 | Process for preparing superfine aluminium hydroxide |
| CN1803622A (en) * | 2006-01-23 | 2006-07-19 | 山东铝业股份有限公司 | Method for preparing aluminium hydroxide micropowder |
Non-Patent Citations (2)
| Title |
|---|
| 碳分晶种对铝酸钠溶液分解的影响. 吴玉胜，毕诗文，李文成，佟志芳，杨毅宏.轻金属，第9期. 2005 * |
| 超细氢氧化铝晶种制备技术研究. 李太昌.轻金属，第6期. 2003 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1911807A (en) | 2007-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102652109A (en) | Synthetic amorphous silica powder and method for producing same | |
| CN109650430B (en) | Method for preparing nano calcium carbonate from limestone with high magnesium content | |
| CN101653830B (en) | Method for preparing superfine cobalt powder in close-packed hexagonal structure or face-centered cubic structure by hydrogen reduction | |
| CN101585539B (en) | Prepartion method of highly anti-yellow resistance white carbon black for silastic | |
| CN101870489A (en) | Method for producing superfine aluminium hydroxide and aluminium oxide by using flyash | |
| CN100378000C (en) | Method for producing micropowder aluminium hydroxide by neutralization method | |
| CN109734129B (en) | Method for producing refined zirconium tetrachloride and byproduct silicon tetrachloride by zirconium silicate ball-making boiling chlorination process | |
| CN101912972B (en) | Preparation method of superfine Ti powders | |
| CN101863501B (en) | Method for producing superfine aluminum hydroxide and aluminum oxide by using solution of aluminum chloride | |
| CN101318685A (en) | Method for preparing ultra-fine active nano-calcium carbonate with low-ore grade limestone activation of activation tank | |
| CN108975362B (en) | Preparation method of completely dispersed aluminum oxide nanoparticles | |
| CN103588211A (en) | Preparation method of spherical zirconium silicate nano aggregate powder | |
| CN102652110A (en) | Synthetic amorphous silica powder and method for producing same | |
| CN108190935B (en) | Preparation method of strip-shaped and sheet-shaped calcium carbonate ultrafine particles | |
| CN1032585C (en) | Preparation for super fine powder of titanium dioxide | |
| RU2394764C1 (en) | Method of producing silicon dioxide | |
| CN102205971B (en) | Method for preparing nano-sized kaolinite | |
| CN113173779A (en) | Alumina filler particle, preparation method thereof and preparation method of alumina filler ball | |
| CN108622920A (en) | A kind of method of aluminous fly-ash extraction aluminium oxide | |
| CN109553121A (en) | A kind of preparation method of high-purity low-sodium aluminum hydroxide | |
| CN1164489C (en) | Process for preparing nano silicone dioxide by adopting two-step carbonization reaction | |
| CN107265471B (en) | A kind of production equipment and preparation method of high-purity clay mineral liquid product | |
| CN113813931B (en) | Preparation method and application of magnesium oxide-magnesium hydroxide/artificial humic acid/biochar ternary complex | |
| CN105692651A (en) | Method for preparing 13X molecular sieve by using potash feldspar as raw material and 13X molecular sieve prepared by method | |
| CN109502622A (en) | A kind of preparation method of medicinal precipitated calcium carbonate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINESE ALUMINIUM CO., LTD. Free format text: FORMER OWNER: SHANDONG ALUMINIUM INDUSTRY CO., LTD. Effective date: 20071026 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20071026 Address after: 100082 No. 62 North Main Street, Beijing, Xizhimen Applicant after: Aluminum Corporation of China Limited Address before: Five 1 km 255052, Zhangdian District, Shandong, Zibo Applicant before: Shandong Aluminium Industry Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |