CN1071144A - The method for preparing white ceric oxide - Google Patents
The method for preparing white ceric oxide Download PDFInfo
- Publication number
- CN1071144A CN1071144A CN91109167A CN91109167A CN1071144A CN 1071144 A CN1071144 A CN 1071144A CN 91109167 A CN91109167 A CN 91109167A CN 91109167 A CN91109167 A CN 91109167A CN 1071144 A CN1071144 A CN 1071144A
- Authority
- CN
- China
- Prior art keywords
- cerium
- ceric oxide
- ammonium sulfate
- white
- ceo
- 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.)
- Pending
Links
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
- C01F17/00—Compounds of rare earth metals
- C01F17/20—Compounds containing only rare earth metals as the metal element
- C01F17/206—Compounds containing only rare earth metals as the metal element oxide or hydroxide being the only anion
- C01F17/224—Oxides or hydroxides of lanthanides
- C01F17/235—Cerium oxides or hydroxides
Abstract
The method that the present invention prepares white ceric oxide belongs to technical field of wet metallurgy.The compound that major technique of the present invention is characterized as with yellow oxidation cerium or various ceriums is a raw material, after sulfuric acid or ammonium sulfate are converted into cerous sulfate or cerium ammonium sulfate salt, can make the pure white cerium dioxide through calcination, cooling again, its crystalline structure is a face-centered cube, and density is 7.1 gram per centimeters
3, the scaling loss amount is 1.0～1.5%.
Description
The method that the present invention prepares white ceric oxide belongs to technical field of wet metallurgy.
The method that retrieval foreign patent GB1490692 prepares white ceric oxide is with the roasting after the compound treatment of boron of cerium salt, makes white ceric oxide, its technology more complicated.
The object of the present invention is to provide a kind of compound with yellow oxidation cerium or other various ceriums is the easier method of feedstock production white ceric oxide.
Technical characterictic of the present invention is: with yellow oxidation cerium, cerium fluoride, Cerium II Chloride (solid), Sedemesis, cerous carbonate, cerous nitrate or cerous hydroxide is raw material, presses CeO with the vitriol oil respectively
2: H
2SO
4=1: 1～1: 1.2 ratio or press CeO with ammonium sulfate respectively
2: (NH
4)
2SO
4=1: 0.5～1: 2.5 mixed is even, and 800～1100 ℃ of calcinations 2～4 hours, firing product is quick cooling or naturally cooling at room temperature in cold water.Also ammonium sulfate can be pressed CeO
2: (NH
4)
2SO
4Join in Cerium II Chloride or cerous nitrate solution at=1: 0.5～1: 2.5, stirred 1 hour down at 90 ℃, and the throw out cerium ammonium sulfate salt after the filtration is 800～1100 ℃ of calcinations 2～4 hours, and firing product is quick cooling or naturally cooling at room temperature in water coolant.When making raw material, at first add and press CeO with yellow cerium dioxide
2: H
2SO
4=1: 1～1: 1.2 the vitriol oil and with the ratio of the vitriol oil be 1: 5 H
2O
2Stir, 300～350 ℃ with unnecessary sulfuric acid evaporate to dryness, then 800～1100 ℃ of calcinations 2～4 hours, firing product is quick cooling or naturally cooling at room temperature in cold water.
It is fairly simple that application the present invention prepares white ceric oxide technology, and product is a white powder, reaches international rare-earth products standard.
Embodiment 1: get Sedemesis 30 grams, add the vitriol oil and mix for 10 milliliters, 900 ℃ of calcinations 2 hours, firing product is quick cooling in cold water then.
Embodiment 2: get Sedemesis 30 grams, add ammonium sulfate 18 grams and mix, 900 ℃ of calcinations 2 hours, firing product is quick cooling in cold water then.
Embodiment 3: get 200 milliliters of solution of cerium chloride by oxidation and add 30 gram ammonium sulfate 90 ℃ of stirrings 1 hour, the throw out after the filtration was 1000 ℃ of calcinations 2.5 hours, and firing product is quick cooling in cold water.
Embodiment 4: extracting yellow Cerium II Chloride 10 grams add 2 milliliters of hydrogen peroxide and 10 milliliters of vitriol oils stir, and with unnecessary sulfuric acid evaporate to dryness, then 950 ℃ of calcinations 2 hours, firing product is quick cooling in cold water under 320 ℃.
The white ceric oxide outward appearance that makes is the pure white powder, and crystalline structure is a face-centered cubic, density 7.13 gram per centimeters
3, scaling loss amount 1.0～1.5%.
Claims (3)
1, a kind of is raw material with yellow oxidation cerium, cerium fluoride, Cerium II Chloride (solid), Sedemesis, cerous carbonate, cerous nitrate or cerous hydroxide, prepares the method for white ceric oxide, it is characterized in that: press CeO with the vitriol oil respectively
2: H
2SO
4=1: 1～1: 1.2 ratio or press CeO with ammonium sulfate respectively
2: (NH
4)
2SO
4=1: 0.5～1: 2.5 mixed is even, and 800～1100 ℃ of calcinations 2～4 hours, firing product is quick cooling or naturally cooling at room temperature in cold water.
2, the method for preparing white ceric oxide according to claim 1 is characterized in that: also ammonium sulfate can be pressed CeO
2: (NH
4)
2SO
4Join in Cerium II Chloride or cerous nitrate solution at=1: 0.5～1: 2.5, stirred 1 hour down at 90 ℃, and the throw out cerium ammonium sulfate salt after the filtration is 800～1100 ℃ of calcinations 2～4 hours, and firing product is quick cooling or naturally cooling at room temperature in water coolant.
3, the method for preparing white ceric oxide according to claim 1 when making raw material with yellow cerium dioxide, at first adds and presses CeO
2: H
2SO
4=1: 1～1: 1.2 the vitriol oil and with the ratio of the vitriol oil be 1: 5 H
2O
2Stir, 300～350 ℃ with unnecessary sulfuric acid evaporate to dryness, then 800～1100 ℃ of calcinations 2～4 hours, firing product is quick cooling or naturally cooling at room temperature in cold water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91109167A CN1071144A (en) | 1991-09-29 | 1991-09-29 | The method for preparing white ceric oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91109167A CN1071144A (en) | 1991-09-29 | 1991-09-29 | The method for preparing white ceric oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1071144A true CN1071144A (en) | 1993-04-21 |
Family
ID=4909683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91109167A Pending CN1071144A (en) | 1991-09-29 | 1991-09-29 | The method for preparing white ceric oxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1071144A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7682584B2 (en) | 2005-11-14 | 2010-03-23 | Lg Chem, Ltd. | Cerium carbonate powder, cerium oxide powder, method for preparing the same, and CMP slurry comprising the same |
| US10899628B2 (en) * | 2017-11-27 | 2021-01-26 | South China Normal University | Cerium sulfate chelated sulfur dioxide, a preparation method and a use thereof |
-
1991
- 1991-09-29 CN CN91109167A patent/CN1071144A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7682584B2 (en) | 2005-11-14 | 2010-03-23 | Lg Chem, Ltd. | Cerium carbonate powder, cerium oxide powder, method for preparing the same, and CMP slurry comprising the same |
| US10899628B2 (en) * | 2017-11-27 | 2021-01-26 | South China Normal University | Cerium sulfate chelated sulfur dioxide, a preparation method and a use thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |