DK172756B1 - Fremstilling af mikrokrystallinsk boehmit - Google Patents
Fremstilling af mikrokrystallinsk boehmit Download PDFInfo
- Publication number
- DK172756B1 DK172756B1 DK198804471A DK447188A DK172756B1 DK 172756 B1 DK172756 B1 DK 172756B1 DK 198804471 A DK198804471 A DK 198804471A DK 447188 A DK447188 A DK 447188A DK 172756 B1 DK172756 B1 DK 172756B1
- Authority
- DK
- Denmark
- Prior art keywords
- boehmite
- process according
- alumina
- precursor
- microcrystalline
- Prior art date
Links
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 title claims description 97
- 229910001593 boehmite Inorganic materials 0.000 title claims description 96
- 238000002360 preparation method Methods 0.000 title description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 55
- 239000000463 material Substances 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 33
- 238000006243 chemical reaction Methods 0.000 claims description 31
- 230000008569 process Effects 0.000 claims description 27
- 239000002243 precursor Substances 0.000 claims description 21
- 239000013078 crystal Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 20
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 15
- -1 aluminum alkoxide Chemical class 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 238000005342 ion exchange Methods 0.000 claims description 6
- 239000000395 magnesium oxide Substances 0.000 claims description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical group [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 6
- 239000006061 abrasive grain Substances 0.000 claims description 5
- 150000001340 alkali metals Chemical class 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002609 medium Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 239000012736 aqueous medium Substances 0.000 claims 8
- 229910001413 alkali metal ion Inorganic materials 0.000 claims 2
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 claims 2
- 239000003966 growth inhibitor Substances 0.000 claims 2
- 229910052593 corundum Inorganic materials 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims 1
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 1
- 239000000047 product Substances 0.000 description 30
- 239000000499 gel Substances 0.000 description 29
- 239000007858 starting material Substances 0.000 description 14
- 239000002002 slurry Substances 0.000 description 11
- 239000007787 solid Substances 0.000 description 11
- 239000003054 catalyst Substances 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 150000004684 trihydrates Chemical class 0.000 description 7
- 239000003082 abrasive agent Substances 0.000 description 6
- 230000002378 acidificating effect Effects 0.000 description 6
- 239000011541 reaction mixture Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 4
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- 238000010335 hydrothermal treatment Methods 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 229910001415 sodium ion Inorganic materials 0.000 description 4
- ZZBAGJPKGRJIJH-UHFFFAOYSA-N 7h-purine-2-carbaldehyde Chemical compound O=CC1=NC=C2NC=NC2=N1 ZZBAGJPKGRJIJH-UHFFFAOYSA-N 0.000 description 3
- 229910002706 AlOOH Inorganic materials 0.000 description 3
- 241000640882 Condea Species 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000001879 gelation Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 150000004682 monohydrates Chemical class 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- UOCIZHQMWNPGEN-UHFFFAOYSA-N dialuminum;oxygen(2-);trihydrate Chemical compound O.O.O.[O-2].[O-2].[O-2].[Al+3].[Al+3] UOCIZHQMWNPGEN-UHFFFAOYSA-N 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 229910001948 sodium oxide Inorganic materials 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 229910018404 Al2 O3 Inorganic materials 0.000 description 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 238000004131 Bayer process Methods 0.000 description 1
- 229910000873 Beta-alumina solid electrolyte Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- UOUJSJZBMCDAEU-UHFFFAOYSA-N chromium(3+);oxygen(2-) Chemical class [O-2].[O-2].[O-2].[Cr+3].[Cr+3] UOUJSJZBMCDAEU-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007863 gel particle Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
- B01J21/04—Alumina
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/008—Abrasive bodies without external bonding agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
- B24D3/14—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic ceramic, i.e. vitrified bondings
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
- C01F7/447—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by wet processes
- C01F7/448—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by wet processes using superatmospheric pressure, e.g. hydrothermal conversion of gibbsite into boehmite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
- C04B35/1115—Minute sintered entities, e.g. sintered abrasive grains or shaped particles such as platelets
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Nanotechnology (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Composite Materials (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Compositions Of Oxide Ceramics (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US8454987A | 1987-08-11 | 1987-08-11 | |
| US8454987 | 1987-08-11 | ||
| US07/133,584 US4797139A (en) | 1987-08-11 | 1987-12-16 | Boehmite produced by a seeded hydyothermal process and ceramic bodies produced therefrom |
| US13358487 | 1987-12-16 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK447188D0 DK447188D0 (da) | 1988-08-10 |
| DK447188A DK447188A (da) | 1989-02-12 |
| DK172756B1 true DK172756B1 (da) | 1999-06-28 |
Family
ID=26771116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK198804471A DK172756B1 (da) | 1987-08-11 | 1988-08-10 | Fremstilling af mikrokrystallinsk boehmit |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US4797139A (enExample) |
| EP (1) | EP0304721B1 (enExample) |
| JP (1) | JPH0761861B2 (enExample) |
| KR (1) | KR960002622B1 (enExample) |
| AU (1) | AU595463B2 (enExample) |
| BR (1) | BR8804056A (enExample) |
| CA (1) | CA1302681C (enExample) |
| DE (1) | DE3879584T2 (enExample) |
| DK (1) | DK172756B1 (enExample) |
| IN (1) | IN170641B (enExample) |
| MX (1) | MX164999B (enExample) |
| NO (1) | NO176513C (enExample) |
| NZ (1) | NZ225586A (enExample) |
Families Citing this family (111)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5445807A (en) * | 1983-09-22 | 1995-08-29 | Aluminum Company Of America | Production of aluminum compound |
| US4964883A (en) * | 1988-12-12 | 1990-10-23 | Minnesota Mining And Manufacturing Company | Ceramic alumina abrasive grains seeded with iron oxide |
| EP0394501B1 (de) * | 1989-04-17 | 1992-10-07 | H.C. Starck GmbH & Co. KG | Verfahren zur Herstellung von alpha-A1203-Sinterkörpern |
| ATE86955T1 (de) * | 1989-04-17 | 1993-04-15 | Starck H C Gmbh Co Kg | Verfahren zur herstellung von alpha-a1203sinterk¯rpern. |
| US5139978A (en) * | 1990-07-16 | 1992-08-18 | Minnesota Mining And Manufacturing Company | Impregnation method for transformation of transition alumina to a alpha alumina |
| US5219806A (en) * | 1990-07-16 | 1993-06-15 | Minnesota Mining And Manufacturing Company | Alpha phase seeding of transition alumina using chromium oxide-based nucleating agents |
| US5178849A (en) * | 1991-03-22 | 1993-01-12 | Norton Company | Process for manufacturing alpha alumina from dispersible boehmite |
| US5569325A (en) * | 1991-04-22 | 1996-10-29 | Condea Vista Company | Process for growing crystals |
| JPH06500068A (ja) * | 1991-04-26 | 1994-01-06 | ビスタ・ケミカル・カンパニー | サブミクロンアルミナ粒子の製造法 |
| US5641469A (en) * | 1991-05-28 | 1997-06-24 | Norton Company | Production of alpha alumina |
| JP2887023B2 (ja) * | 1992-03-30 | 1999-04-26 | ワイケイケイ株式会社 | 微細板状ベーマイト粒子及びその製造方法 |
| DE69425816T2 (de) * | 1993-11-25 | 2001-04-26 | Sumitomo Chemical Co., Ltd. | Verfahren zur herstellung von alpha-aluminumoxid-pulver |
| JP3755826B2 (ja) * | 1993-12-09 | 2006-03-15 | 触媒化成工業株式会社 | アルミナの製造方法と装置 |
| US5372620A (en) * | 1993-12-13 | 1994-12-13 | Saint Gobain/Norton Industrial Ceramics Corporation | Modified sol-gel alumina abrasive filaments |
| AU699077B2 (en) * | 1995-02-21 | 1998-11-19 | Sumitomo Chemical Company, Limited | Alpha-alumina and method for producing the same |
| US5593468A (en) * | 1995-07-26 | 1997-01-14 | Saint-Gobain/Norton Industrial Ceramics Corporation | Sol-gel alumina abrasives |
| EP0761600B1 (en) * | 1995-08-24 | 2005-01-12 | Kinsei Matec Co., Ltd. | Alumina particles having high dispersibility and plasticity and process for producing the same |
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| US3615306A (en) * | 1967-10-12 | 1971-10-26 | Norton Co | A method for producing alpha-alumina crystals from aluminum oxide |
| FR2450232A1 (fr) * | 1979-02-28 | 1980-09-26 | Pechiney Aluminium | Procede de transformation de l'hydrargilitte en boehmite |
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-
1987
- 1987-12-16 US US07/133,584 patent/US4797139A/en not_active Expired - Lifetime
-
1988
- 1988-07-27 NZ NZ225586A patent/NZ225586A/en unknown
- 1988-08-01 IN IN639/CAL/88A patent/IN170641B/en unknown
- 1988-08-02 MX MX12516A patent/MX164999B/es unknown
- 1988-08-04 AU AU20452/88A patent/AU595463B2/en not_active Expired
- 1988-08-08 CA CA000574091A patent/CA1302681C/en not_active Expired - Lifetime
- 1988-08-09 EP EP88112945A patent/EP0304721B1/en not_active Expired - Lifetime
- 1988-08-09 NO NO883535A patent/NO176513C/no not_active IP Right Cessation
- 1988-08-09 DE DE8888112945T patent/DE3879584T2/de not_active Expired - Lifetime
- 1988-08-10 KR KR1019880010204A patent/KR960002622B1/ko not_active Expired - Lifetime
- 1988-08-10 JP JP63198102A patent/JPH0761861B2/ja not_active Expired - Lifetime
- 1988-08-10 DK DK198804471A patent/DK172756B1/da not_active IP Right Cessation
- 1988-08-11 BR BR8804056A patent/BR8804056A/pt not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CA1302681C (en) | 1992-06-09 |
| NO176513C (no) | 1995-04-19 |
| JPH0761861B2 (ja) | 1995-07-05 |
| DE3879584T2 (de) | 1993-09-23 |
| KR960002622B1 (ko) | 1996-02-24 |
| MX164999B (es) | 1992-10-13 |
| NO883535L (no) | 1989-02-13 |
| KR890003623A (ko) | 1989-04-15 |
| NZ225586A (en) | 1991-07-26 |
| DK447188A (da) | 1989-02-12 |
| DE3879584D1 (de) | 1993-04-29 |
| DK447188D0 (da) | 1988-08-10 |
| EP0304721B1 (en) | 1993-03-24 |
| US4797139A (en) | 1989-01-10 |
| NO883535D0 (no) | 1988-08-09 |
| IN170641B (enExample) | 1992-04-25 |
| AU2045288A (en) | 1989-02-16 |
| EP0304721A1 (en) | 1989-03-01 |
| NO176513B (no) | 1995-01-09 |
| JPS6469511A (en) | 1989-03-15 |
| AU595463B2 (en) | 1990-03-29 |
| BR8804056A (pt) | 1989-05-02 |
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| B1 | Patent granted (law 1993) | ||
| PUP | Patent expired |