CN100465096C - Method for preparing sheet alumina using coal series kaolin rock or flyash as raw material - Google Patents
Method for preparing sheet alumina using coal series kaolin rock or flyash as raw material Download PDFInfo
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- CN100465096C CN100465096C CNB2007100684330A CN200710068433A CN100465096C CN 100465096 C CN100465096 C CN 100465096C CN B2007100684330 A CNB2007100684330 A CN B2007100684330A CN 200710068433 A CN200710068433 A CN 200710068433A CN 100465096 C CN100465096 C CN 100465096C
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- kaolin rock
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- 239000003245 coal Substances 0.000 title claims abstract description 23
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 title claims abstract description 23
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims description 23
- 239000005995 Aluminium silicate Substances 0.000 title claims description 22
- 235000012211 aluminium silicate Nutrition 0.000 title claims description 22
- 239000011435 rock Substances 0.000 title claims description 22
- 239000010881 fly ash Substances 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 16
- 239000002994 raw material Substances 0.000 title claims description 6
- 238000001354 calcination Methods 0.000 claims abstract description 19
- 238000007885 magnetic separation Methods 0.000 claims abstract description 11
- 238000007670 refining Methods 0.000 claims abstract description 11
- 238000007493 shaping process Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims abstract description 6
- 238000010298 pulverizing process Methods 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 20
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 16
- 238000010792 warming Methods 0.000 claims description 16
- 238000005119 centrifugation Methods 0.000 claims description 15
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 13
- 239000004411 aluminium Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 10
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 9
- 235000019260 propionic acid Nutrition 0.000 claims description 9
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 claims description 9
- 229920006395 saturated elastomer Polymers 0.000 claims description 9
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 claims description 8
- 159000000013 aluminium salts Chemical class 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical group COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 5
- 235000019253 formic acid Nutrition 0.000 claims description 5
- 239000012266 salt solution Substances 0.000 claims description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 4
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 4
- 238000001754 furnace pyrolysis Methods 0.000 claims description 4
- 229910017604 nitric acid Inorganic materials 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 239000010883 coal ash Substances 0.000 abstract 1
- 229910052622 kaolinite Inorganic materials 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 9
- 238000000746 purification Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 229940037003 alum Drugs 0.000 description 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 6
- 235000011149 sulphuric acid Nutrition 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- -1 papermaking Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000005185 salting out Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A process for preparing flaky aluminum oxide from coal kaolinite or powdered coal ash includes such steps as pulverizing, magnetic separation, high-temp calcining, extracting in acid to obtain Al salt, purifying, refining, crystallizing, shaping and pyrolyzing.
Description
Technical field
The present invention relates to coal series kaolin rock or Ash Utilization deep processing and utilization field, particularly a kind of is the method for feedstock production tabular alumina with coal series kaolin rock or flyash.
Background technology
Coal series kaolin rock and flyash are being used as cement, ceramic raw material, papermaking, coating and filler traditionally, in view of domestic and international market bauxite resource critical shortage, coal series kaolin rock and flyash also are used as the raw material of producing aluminum oxide in recent years, because of product orientation mainly is the low value-added product of some preliminary working, the utilization of resources is insufficient, economic benefit is not obvious at present.
Tabular alumina is except that the good physical and chemical performance with aluminum oxide itself, also because it is nano level or be bordering on nano level on thickness dimension, it on the radial dimension micron order, thereby have the dual nature of nano-powder and micro-powder concurrently, can combine with other active group is effective, be difficult for again reuniting; The flaky alumina purity height of synthetic, the face thickness rate is adjustable, and powder itself is close to water white transparency.In pearly pigment, makeup, automobile finish, filler and abrasive material field etc., huge application potential is arranged.
The technical difficult points of acidic process coal series kaolin rock or fly-ash Preparation tabular alumina is: 1) foreign ions such as the iron in the purification removal vat liquor, manganese, the particularly removal of iron ion, common method for removing iron as: technology such as extraction, ion-exchange, recrystallization, alkaline media deironing can not reach economical and effective deironing purpose; 2) the aluminum oxide crystalline form is difficult to control, and tabular alumina is used preparations such as molten-salt growth method, high-temperature sintering process, hydrothermal method, coating method, mechanical process usually, these method steps complexity usually, and processing condition are strict, and product purity is low, the cost height.
Summary of the invention
The purpose of this invention is to provide a kind of is the method for feedstock production tabular alumina with coal series kaolin rock or flyash.
With coal series kaolin rock or flyash is that the method for feedstock production tabular alumina is to be raw material with coal series kaolin rock or flyash, through pulverizing, magnetic separation, calcining, acidleach carry aluminium salt, pyrogenically prepared flake ultrafine aluminum oxide after purified, refining, the shaping, concrete steps are as follows:
1) with the oven dry of coal series kaolin rock or flyash, pulverize, dry magnetic separation then 550～850 ℃ of calcinings 1～4 hour down, is that 20～35% acid mixes with mass percent concentration, 100～250 ℃ of following lixiviates 1～4 hour; Filter or centrifugation, promptly get aluminum salt solution;
2) aluminum salt solution that step 1) is made is regulated pH to 3～5 with alkali, filters or centrifugation, obtains the purified aluminium salts solution;
3) with step 2) gained purified aluminium salts solution evaporation concentration is to saturated adding shaping agent, and by aluminium: the mol ratio of shaping agent is 1:50～300, is cooled to room temperature, separates out aluminium salt, after filtration or centrifugation, promptly gets and makes with extra care flaky aluminum salt; Mother liquid recycling.
4) the refining flaky aluminum salt of step 3) gained is put into the calcining furnace pyrolysis, be warming up to 400～500 ℃, be incubated 1～2 hour with the speed of 2～20 ℃/min; Speed with 100～200 ℃/min is warming up to 1000～1300 ℃ then, is incubated 1～2 hour, gets the flake ultrafine alumina product.
Described acid is hydrochloric acid, sulfuric acid or nitric acid.The shaping agent is formic acid, acetate, propionic acid, butyric acid or the compound between them.
The advantage that comparison had of the present invention and prior art is that preparation technology is simple, the operational condition gentleness, and raw material cheaply is easy to get, the mother liquor reusable edible, cost is low; The flake ultrafine aluminum oxide pattern of preparation is regular, particle diameter even, narrow particle size distribution, and the face thickness rate is big.
Embodiment
Of the present invention is the method for feedstock production tabular alumina with coal series kaolin rock or flyash, pH condition by the hierarchy of control, impurity major parts such as iron in the aluminium vat liquor, manganese, lead are removed with sedimentary form, again that purified aluminum salt solution evaporation concentration is extremely saturated, add precipitation agent, shaping agent, use the salting-out process recrystallization, obtain purified flaky aluminum salt.Used precipitation agent, shaping agent are same class organic acids, i.e. formic acid, acetate, propionic acid, butyric acid or the compound between them.
Of the present invention is the method for feedstock production tabular alumina with coal series kaolin rock or flyash, it is characterized in that to make with extra care flaky aluminum salt by temperature programming, dehydration and acid group and the aluminum oxide temperature rise rate of conversion stage is mutually controlled in high-temperature calcination respectively, the flake ultrafine alumina product.
The present invention is further described in conjunction with following example, but content of the present invention is not limited only to content related among the embodiment.
Embodiment 1
1) with coal series kaolin rock oven dry, to pulverize, dry magnetic separation then 550 ℃ of calcinings 4 hours down, is that 20% sulfuric acid mixes with mass percent concentration, 250 ℃ of following lixiviates 1 hour; Filter, promptly get alum liquor;
2) alum liquor that step 1) is made is regulated pH to 3 with sodium hydroxide, filters, and obtains the purification of sulphuric acids aluminum solutions;
3) with step 2) gained purification of sulphuric acids aluminum solutions evaporation concentration is to saturated, and by aluminium: the mol ratio of formic acid is that the ratio of 1:50 adds formic acid, is cooled to room temperature, separates out Tai-Ace S 150, and filtration promptly gets and makes with extra care sheet Tai-Ace S 150; Mother liquid recycling.
4) the refining sheet Tai-Ace S 150 of step 3) gained is put into the calcining furnace pyrolysis, be warming up to 400 ℃, be incubated 1 hour with the speed of 2 ℃/min; Speed with 100 ℃/min is warming up to 1000 ℃ then, is incubated 1 hour, gets the flake ultrafine alumina product.
Embodiment 2
1) with flyash oven dry, to pulverize, dry magnetic separation then 850 ℃ of calcinings 1 hour down, is that 35% nitric acid mixes with mass percent concentration, 100 ℃ of following lixiviates 4 hours; Centrifugation promptly gets aluminum nitrate solution;
2) aluminum nitrate solution that step 1) is made is regulated pH to 5 with sodium bicarbonate, and centrifugation obtains the purifying aluminum nitrate solution;
3) with step 2) gained purifying aluminum nitrate solution evaporation concentration is to saturated, and by aluminium: the mol ratio of acetate is the ratio adding acetate of 1:300, is cooled to room temperature, separates out aluminum nitrate, and centrifugation promptly gets and makes with extra care the sheet aluminum nitrate; Mother liquid recycling.
4) the refining sheet aluminum nitrate of step 3) gained is put into the calcining furnace pyrolysis, be warming up to 500 ℃, be incubated 2 hours with the speed of 20 ℃/min; Speed with 200 ℃/min is warming up to 1300 ℃ then, is incubated 2 hours, gets the flake ultrafine alumina product.
Embodiment 3
1) with coal series kaolin rock oven dry, pulverize, dry magnetic separation, then 650 ℃ of calcinings 3 hours down, with mass percent concentration be 30% mixed in hydrochloric acid, 125 ℃ of following lixiviates 4 hours; Filter, promptly get liquor alumini chloridi;
2) liquor alumini chloridi that step 1) is made is regulated pH to 5 with yellow soda ash, and centrifugation obtains the purification of chlorinated aluminum solutions;
3) with step 2) gained purification of chlorinated aluminum solutions evaporation concentration is to saturated, and by aluminium: the mol ratio of propionic acid is the ratio adding propionic acid of 1:50, is cooled to room temperature, separates out aluminum chloride, after filtration or centrifugation, promptly gets and makes with extra care sheet aluminum chloride, mother liquid recycling;
4) the refining sheet aluminum chloride of step 3) gained is put into calcining furnace, be warming up to 500 ℃, be incubated 2 hours with the speed of 2 ℃/min; Speed with 200 ℃/min is warming up to 1300 ℃ then, is incubated 1 hour, gets the flake ultrafine alumina product.
Embodiment 4
1) with coal series kaolin rock oven dry, to pulverize, dry magnetic separation then 750 ℃ of calcinings 1 hour down, is that 30% nitric acid mixes with mass percent concentration, 125 ℃ of following lixiviates 3.5 hours; Filter, promptly get aluminum nitrate solution;
2) pH of the aluminum nitrate solution that step 1) is made transfers to 3, filters or centrifugation, obtains the purifying aluminum nitrate solution;
3) with step 2) gained purifying aluminum nitrate solution evaporation concentration is to saturated, and by aluminium: butyro-mol ratio is the ratio adding butyric acid of 1:100, is cooled to room temperature, separates out aluminum nitrate, after filtration or centrifugation, promptly gets and makes with extra care sheet aluminum nitrate, mother liquid recycling;
4) the refining sheet aluminum nitrate aluminium of step 3) gained is put into calcining furnace, be warming up to 500 ℃, be incubated 1 hour with the speed of 20 ℃/min; Speed with 100 ℃/min is warming up to 1000 ℃ then, is incubated 2 hours, gets the flake ultrafine alumina product.
Embodiment 5
1) with coal series kaolin rock oven dry, to pulverize, dry magnetic separation then 850 ℃ of calcinings 1 hour down, is that 35% sulfuric acid mixes with mass percent concentration, 125 ℃ of following lixiviates 3.5 hours; Filter, promptly get alum liquor;
2) alum liquor that step 1) is made is regulated pH to 4 with sodium hydroxide, filters or centrifugation, obtains the purification of sulphuric acids aluminum solutions;
3) with step 2) gained purification of sulphuric acids aluminum solutions evaporation concentration is to saturated, and by aluminium: the mol ratio of propionic acid is that the ratio of 1:150 mol ratio adds propionic acid, is cooled to room temperature, separates out Tai-Ace S 150, and filtration promptly gets and makes with extra care sheet Tai-Ace S 150, mother liquid recycling;
4) the refining sheet Tai-Ace S 150 of step 3) gained is put into calcining furnace, be warming up to 500 ℃, be incubated 1.5 hours with the speed of 5 ℃/min; Speed with 200 ℃/min is warming up to 1200 ℃ then, is incubated 2 hours, gets the flake ultrafine alumina product.
Embodiment 6
1) with flyash oven dry, to pulverize, dry magnetic separation then 850 ℃ of calcinings 1 hour down, is that 35% sulfuric acid mixes with mass percent concentration, 125 ℃ of following lixiviates 3.5 hours; Filter, promptly get alum liquor;
2) alum liquor that step 1) is made is regulated pH to 4 with sodium hydroxide, filters or centrifugation, obtains the purification of sulphuric acids aluminum solutions;
3) with step 2) gained purification of sulphuric acids aluminum solutions evaporation concentration is to saturated, and by aluminium: the mol ratio of propionic acid is that the ratio of 1:150 adds propionic acid, is cooled to room temperature, separates out Tai-Ace S 150, and filtration promptly gets and makes with extra care sheet Tai-Ace S 150, mother liquid recycling;
4) the refining sheet Tai-Ace S 150 of step 3) gained is put into calcining furnace, be warming up to 500 ℃, be incubated 1.5 hours with the speed of 5 ℃/min; Speed with 200 ℃/min is warming up to 1200 ℃ then, is incubated 2 hours, gets the flake ultrafine alumina product.
Claims (3)
1. one kind is the method for feedstock production tabular alumina with coal series kaolin rock or flyash, it is characterized in that it is is raw material with coal series kaolin rock or flyash, through pulverizing, magnetic separation, calcining, acidleach carry aluminium salt, pyrogenically prepared flake ultrafine aluminum oxide after purified, refining, the shaping, concrete steps are as follows:
1) with the oven dry of coal series kaolin rock or flyash, pulverize, dry magnetic separation then 550～850 ℃ of calcinings 1～4 hour down, is that 20～35% acid mixes with mass percent concentration, 100～250 ℃ of following lixiviates 1～4 hour; Filter or centrifugation, promptly get aluminum salt solution;
2) aluminum salt solution that step 1) is made is regulated pH to 3～5 with alkali, filters or centrifugation, obtains the purified aluminium salts solution;
3) with step 2) gained purified aluminium salts solution evaporation concentration is to saturated adding shaping agent, and by aluminium: the mol ratio of shaping agent is 1:50～300, is cooled to room temperature, separates out aluminium salt, after filtration or centrifugation, promptly gets and makes with extra care flaky aluminum salt; Mother liquid recycling;
4) the refining flaky aluminum salt of step 3) gained is put into the calcining furnace pyrolysis, be warming up to 400～500 ℃, be incubated 1～2 hour with the speed of 2～20 ℃/min; Speed with 100～200 ℃/min is warming up to 1000～1300 ℃ then, is incubated 1～2 hour, gets the flake ultrafine alumina product.
2. as claimed in claim 1 a kind of be the method for feedstock production tabular alumina with coal series kaolin rock or flyash, it is characterized in that described acid is hydrochloric acid, sulfuric acid or nitric acid.
3. as claimed in claim 1 a kind of be the method for feedstock production tabular alumina with coal series kaolin rock or flyash, it is characterized in that described shaping agent is formic acid, acetate, propionic acid, butyric acid or the compound between them.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100684330A CN100465096C (en) | 2007-05-08 | 2007-05-08 | Method for preparing sheet alumina using coal series kaolin rock or flyash as raw material |
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| CNB2007100684330A CN100465096C (en) | 2007-05-08 | 2007-05-08 | Method for preparing sheet alumina using coal series kaolin rock or flyash as raw material |
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| CN100465096C true CN100465096C (en) | 2009-03-04 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101775659B (en) * | 2010-01-14 | 2011-11-23 | 陕西理工学院 | Process for preparing mullite whisker or flaky alumina by using coal ash |
| CN101811712A (en) | 2010-04-27 | 2010-08-25 | 中国神华能源股份有限公司 | Method for preparing metallurgical-grade aluminum oxide by using fluid-bed fly ash |
| CN102020299B (en) * | 2010-12-23 | 2012-10-24 | 南京航空航天大学 | Method for producing industrial activated aluminum oxide from pulverized fuel ash |
| AU2012386620B2 (en) * | 2012-08-01 | 2017-02-02 | Obshestvo S Ogranichennoy Otvetstvennost'yu "Obedinennaya Kompania Rusal Inzhenerno-Tekhnologicheskiy Tsentr" | Method for producing alumina |
| CN103480793A (en) * | 2013-08-26 | 2014-01-01 | 安徽金岩高岭土科技有限公司 | Precision-casting surface-layer sand powder processed from coal series kaolinite |
| CN106277002A (en) * | 2016-08-18 | 2017-01-04 | 合肥信诺捷科节能服务有限公司 | A kind of method preparing nano aluminium oxide |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3961030A (en) * | 1974-08-12 | 1976-06-01 | Freeport Minerals Company | Production of alumina from ores |
| CN1334240A (en) * | 2000-07-14 | 2002-02-06 | 任忠胜 | Process for preparing super-purity alumina from gaolinite (gaolin) |
| CN1623901A (en) * | 2004-07-02 | 2005-06-08 | 郭长征 | Novel process for producing alumina |
| CN1923695A (en) * | 2006-09-15 | 2007-03-07 | 平朔煤炭工业公司 | Method for preparing alumina from fly ash |
| CN1927716A (en) * | 2006-08-29 | 2007-03-14 | 吉林大学 | Preparation method of alumina |
-
2007
- 2007-05-08 CN CNB2007100684330A patent/CN100465096C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3961030A (en) * | 1974-08-12 | 1976-06-01 | Freeport Minerals Company | Production of alumina from ores |
| CN1334240A (en) * | 2000-07-14 | 2002-02-06 | 任忠胜 | Process for preparing super-purity alumina from gaolinite (gaolin) |
| CN1623901A (en) * | 2004-07-02 | 2005-06-08 | 郭长征 | Novel process for producing alumina |
| CN1927716A (en) * | 2006-08-29 | 2007-03-14 | 吉林大学 | Preparation method of alumina |
| CN1923695A (en) * | 2006-09-15 | 2007-03-07 | 平朔煤炭工业公司 | Method for preparing alumina from fly ash |
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| CN101045543A (en) | 2007-10-03 |
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