ES367385A1 - PROCEDURE FOR OBTAINING ALUMINA MONOHYDRATE. - Google Patents
PROCEDURE FOR OBTAINING ALUMINA MONOHYDRATE.Info
- Publication number
- ES367385A1 ES367385A1 ES367385A ES367385A ES367385A1 ES 367385 A1 ES367385 A1 ES 367385A1 ES 367385 A ES367385 A ES 367385A ES 367385 A ES367385 A ES 367385A ES 367385 A1 ES367385 A1 ES 367385A1
- Authority
- ES
- Spain
- Prior art keywords
- alumina monohydrate
- procedure
- prepared
- heating
- less
- 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.)
- Expired
Links
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title abstract 2
- 150000004682 monohydrates Chemical class 0.000 title abstract 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 abstract 3
- JLDSOYXADOWAKB-UHFFFAOYSA-N aluminium nitrate Chemical compound [Al+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O JLDSOYXADOWAKB-UHFFFAOYSA-N 0.000 abstract 3
- 229910018626 Al(OH) Inorganic materials 0.000 abstract 2
- 239000013078 crystal Substances 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 150000002823 nitrates Chemical class 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 238000013022 venting Methods 0.000 abstract 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
- C01F7/30—Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
- C01F7/308—Thermal decomposition of nitrates
-
- 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
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Al 2 O 3 .H 2 O is prepared by heating an aqueous solution of basic aluminium nitrate of formula Al 2 O 3 .pN 2 O 5 , where p is 0À75 to 2À25, at a concentration of less than 25% NO 3 by weight, at temperatures of at least 180 C., preferably 190-210 C. under autogenous pressure. Suitable basic nitrates comprise Al(OH) 2 NO 3 and some Al(OH)(NO 3 ) 2 . Seed crystals of alumina monohydrate may be added to give Al 2 O 3 H 2 O crystals of particle size of 15 microns or higher. The basic aluminium nitrates may be prepared by partially denitrifying Al(NO 3 ) 3 .9H 2 O by heating at above the decomposition temperature but less than 230 C. and at a pressure in excess of 175 kg./cm.2 while venting to release HNO 3 (as described in Specification 1,083,537).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US73093668A | 1968-05-21 | 1968-05-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES367385A1 true ES367385A1 (en) | 1971-04-01 |
Family
ID=24937398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES367385A Expired ES367385A1 (en) | 1968-05-21 | 1969-05-19 | PROCEDURE FOR OBTAINING ALUMINA MONOHYDRATE. |
Country Status (8)
| Country | Link |
|---|---|
| AT (1) | AT284789B (en) |
| BR (1) | BR6908423D0 (en) |
| DE (1) | DE1921185A1 (en) |
| ES (1) | ES367385A1 (en) |
| FR (1) | FR2010474A1 (en) |
| GB (1) | GB1264672A (en) |
| IL (1) | IL32083A0 (en) |
| NL (1) | NL6905518A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI348457B (en) * | 2003-03-04 | 2011-09-11 | Sumitomo Chemical Co | Method for producing 帢-alumina particulate |
-
1969
- 1969-04-10 NL NL6905518A patent/NL6905518A/xx unknown
- 1969-04-23 GB GB1264672D patent/GB1264672A/en not_active Expired
- 1969-04-24 AT AT395769A patent/AT284789B/en active
- 1969-04-25 DE DE19691921185 patent/DE1921185A1/en active Pending
- 1969-04-28 IL IL32083A patent/IL32083A0/en unknown
- 1969-04-29 BR BR208423/69A patent/BR6908423D0/en unknown
- 1969-05-19 ES ES367385A patent/ES367385A1/en not_active Expired
- 1969-05-20 FR FR6916383A patent/FR2010474A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE1921185A1 (en) | 1970-02-05 |
| NL6905518A (en) | 1969-11-25 |
| IL32083A0 (en) | 1969-06-25 |
| GB1264672A (en) | 1972-02-23 |
| FR2010474A1 (en) | 1970-02-20 |
| AT284789B (en) | 1970-09-25 |
| BR6908423D0 (en) | 1973-01-02 |
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