JPS57166322A - Preparation of goethite - Google Patents
Preparation of goethiteInfo
- Publication number
- JPS57166322A JPS57166322A JP56051091A JP5109181A JPS57166322A JP S57166322 A JPS57166322 A JP S57166322A JP 56051091 A JP56051091 A JP 56051091A JP 5109181 A JP5109181 A JP 5109181A JP S57166322 A JPS57166322 A JP S57166322A
- Authority
- JP
- Japan
- Prior art keywords
- suspension
- hydroxide
- gas
- aqueous solution
- oxidizing state
- 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.)
- Granted
Links
Landscapes
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To prepare goethite having sharp particle size distribution, by feeding a ferrous salt solution and an alkaline aqueous solution continuously to a tank, and circulating the produced suspension of hydroxide to a tank of non-oxidizing state through a circulation path, wherein a part of said path is in oxidizing state and the rest part of the path is in non-oxidizing state.
CONSTITUTION: A ferrous salt solution, e.g. aqueous solution of ferrous sulfate, and an alkaline aqueous solution, e.g. aqueous solution of caustic soda, are fed to a mixer 3 through the pumps 1, 2, and mixed together to obtain hydroxide. The hydroxide suspension is sent to the tank4 which is made to non-oxidizing state by introducing nitrogen gas through the pipe 5. After charging a definite amount of the suspension, the supply is stopped, and the pump 7 is operated to extract a part of the hydroxide suspension and circulate through the circulation path 6. The circulation path 6 is supplied with air by the gas-introducing means 9, and the air is mixed with the suspension in the gas-liquid mixer 8 to effect the oxidation of the hydroxide in the suspension. The suspension discharged from the gas-liquid mixer 8 is transferred to the gas-liquid separator 10, in which air is separated from the suspension restoring the suspension to the non- oxidizing state.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56051091A JPS57166322A (en) | 1981-04-07 | 1981-04-07 | Preparation of goethite |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56051091A JPS57166322A (en) | 1981-04-07 | 1981-04-07 | Preparation of goethite |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57166322A true JPS57166322A (en) | 1982-10-13 |
JPH028970B2 JPH028970B2 (en) | 1990-02-28 |
Family
ID=12877137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56051091A Granted JPS57166322A (en) | 1981-04-07 | 1981-04-07 | Preparation of goethite |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57166322A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62230624A (en) * | 1986-03-29 | 1987-10-09 | Ngk Insulators Ltd | Apparatus for synthesizing iron oxide |
US4748017A (en) * | 1986-01-17 | 1988-05-31 | Showa Denko Kabushiki Kaisha | Method for manufacturing lepidocrocite |
-
1981
- 1981-04-07 JP JP56051091A patent/JPS57166322A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4748017A (en) * | 1986-01-17 | 1988-05-31 | Showa Denko Kabushiki Kaisha | Method for manufacturing lepidocrocite |
JPS62230624A (en) * | 1986-03-29 | 1987-10-09 | Ngk Insulators Ltd | Apparatus for synthesizing iron oxide |
JPH0427172B2 (en) * | 1986-03-29 | 1992-05-11 | Ngk Insulators Ltd |
Also Published As
Publication number | Publication date |
---|---|
JPH028970B2 (en) | 1990-02-28 |
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