JPS56169131A - Manufacture of needlelike goethite - Google Patents
Manufacture of needlelike goethiteInfo
- Publication number
- JPS56169131A JPS56169131A JP6960280A JP6960280A JPS56169131A JP S56169131 A JPS56169131 A JP S56169131A JP 6960280 A JP6960280 A JP 6960280A JP 6960280 A JP6960280 A JP 6960280A JP S56169131 A JPS56169131 A JP S56169131A
- Authority
- JP
- Japan
- Prior art keywords
- oxidizing agent
- ferrous
- ratio
- anions
- precipitate
- 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
Landscapes
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To reduce the particle size and to increase the axial ratio by adding alkali and an oxidizing agent to a ferrous salt soln. to precipitate and age ferrous hydroxide, adjusting the ratio of anions to ferrous ions, and blowing a gaseous oxidizing agent to carry out oxidation at ≤80°C.
CONSTITUTION: Alkali and an oxidizing agent are added to a ferrous salt soln. to precipitate and age ferrous hydroxide at ≥11pH, and the ratio of anions to ferrous ions is adjusted to ≤1. A gaseous oxidizing agent selected from air, oxygen enriched air and oxygen is then blown to carry out oxidation at ≤80°C, thereby manufacturing needlelike goethite. Said oxidizing agent is selected from potassium chlorate, sodium chlorate, sodium nitrate and potassium nitrate.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6960280A JPS56169131A (en) | 1980-05-27 | 1980-05-27 | Manufacture of needlelike goethite |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6960280A JPS56169131A (en) | 1980-05-27 | 1980-05-27 | Manufacture of needlelike goethite |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56169131A true JPS56169131A (en) | 1981-12-25 |
Family
ID=13407541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6960280A Pending JPS56169131A (en) | 1980-05-27 | 1980-05-27 | Manufacture of needlelike goethite |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56169131A (en) |
-
1980
- 1980-05-27 JP JP6960280A patent/JPS56169131A/en active Pending
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