JPS6454090A - Production of rare earth abrasive - Google Patents
Production of rare earth abrasiveInfo
- Publication number
- JPS6454090A JPS6454090A JP62209708A JP20970887A JPS6454090A JP S6454090 A JPS6454090 A JP S6454090A JP 62209708 A JP62209708 A JP 62209708A JP 20970887 A JP20970887 A JP 20970887A JP S6454090 A JPS6454090 A JP S6454090A
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- burning
- rare earth
- wet
- obtd
- 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
Abstract
PURPOSE:To obtain the title abrasive in the form of fine particles which has excellent filterability and sedimentability and is free from re-coagulation, by burning a starting material, performing wet pulverization, adjusting the pH value of a wet pulverized slurry to a predetermined value, adding a hydrogen carbonate and drying the flocs thus prepd. CONSTITUTION:A cerium chloride-based burning product obtd. by burning a hydrogenation product, a carbonate, an oxalate or the like obtd. from a rare earth chloride or a bastnaesite-based burning product obtd. by burning a bastnaesite ore which is a fluorocarbonate is wet pulverized and wet classified to prepare a wet pulverized slurry of a rare earth abrasive having the target particle size distribution. The pH of this slurry is adjusted to 4-8, and thereafter a hydrogen carbonate, such as NH4HCO3 or NaHCO3, is added to the slurry in an amt. of 0.2-2wt.% (relative to solid contents of the slurry) so as to form flocs having excellent sedimentability. The slurry is allowed to stand still for a predetermined period of time, and then the supernatant is removed or concn. is performed with a thickener etc. The conc. slurry is dried by a spray dryer etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62209708A JPS6454090A (en) | 1987-08-24 | 1987-08-24 | Production of rare earth abrasive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62209708A JPS6454090A (en) | 1987-08-24 | 1987-08-24 | Production of rare earth abrasive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6454090A true JPS6454090A (en) | 1989-03-01 |
Family
ID=16577324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62209708A Pending JPS6454090A (en) | 1987-08-24 | 1987-08-24 | Production of rare earth abrasive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6454090A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09507750A (en) * | 1993-12-22 | 1997-08-12 | メルク エンド カンパニー インコーポレーテッド | DNA encoding Wnt-x growth factor |
| JP2008001907A (en) * | 2007-07-26 | 2008-01-10 | Mitsui Mining & Smelting Co Ltd | Cerium-based abrasive slurry and method for producing cerium-based abrasive slurry |
| US8147763B2 (en) | 2001-08-02 | 2012-04-03 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Honeycomb body having a contraction limiter |
-
1987
- 1987-08-24 JP JP62209708A patent/JPS6454090A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09507750A (en) * | 1993-12-22 | 1997-08-12 | メルク エンド カンパニー インコーポレーテッド | DNA encoding Wnt-x growth factor |
| US8147763B2 (en) | 2001-08-02 | 2012-04-03 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Honeycomb body having a contraction limiter |
| JP2008001907A (en) * | 2007-07-26 | 2008-01-10 | Mitsui Mining & Smelting Co Ltd | Cerium-based abrasive slurry and method for producing cerium-based abrasive slurry |
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