JPS5673633A - Manufacture of needlelike goethite - Google Patents
Manufacture of needlelike goethiteInfo
- Publication number
- JPS5673633A JPS5673633A JP14714579A JP14714579A JPS5673633A JP S5673633 A JPS5673633 A JP S5673633A JP 14714579 A JP14714579 A JP 14714579A JP 14714579 A JP14714579 A JP 14714579A JP S5673633 A JPS5673633 A JP S5673633A
- Authority
- JP
- Japan
- Prior art keywords
- ferrous
- manufacture
- needlelike
- goethite
- anions
- 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 obtain homogeneous needlelike goethite by adding alkali to a ferrous salt soln., adjusting the ratio of anions to ferrous ions to ≤1, and carrying out oxidation with sodium chlorate or potassium chlorate.
CONSTITUTION: Alkali is added to a ferrous salt soln. such as a ferrous sulfate soln. to precipitate ferrous hydroxide at ≥11pH, and the ratio of anions to ferrous ions is adjusted to ≤1. At this time, the setting time of ferrous hydroxide is controlled to 2W16hr. Sodium chlorate or potassium chlorate is then added to manufacture needlelike goethite by oxidation at ≤80°C.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14714579A JPS5673633A (en) | 1979-11-15 | 1979-11-15 | Manufacture of needlelike goethite |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14714579A JPS5673633A (en) | 1979-11-15 | 1979-11-15 | Manufacture of needlelike goethite |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5673633A true JPS5673633A (en) | 1981-06-18 |
Family
ID=15423593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14714579A Pending JPS5673633A (en) | 1979-11-15 | 1979-11-15 | Manufacture of needlelike goethite |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5673633A (en) |
-
1979
- 1979-11-15 JP JP14714579A patent/JPS5673633A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES468596A1 (en) | Stabilized ferromagnetic chromium dioxide and process for its preparation | |
JPS54121127A (en) | Photographic processing composition | |
JPS5269898A (en) | Production of phosphate pigment | |
JPS5673633A (en) | Manufacture of needlelike goethite | |
JPS5673631A (en) | Manufacture of needlelike goethite | |
JPS5673632A (en) | Manufacture of needlelike goethite | |
JPS5417113A (en) | Poultice | |
ES456820A1 (en) | Metallic descaling system | |
JPS53132499A (en) | Production of chromium hydroxide | |
ES8400372A1 (en) | Rapid setting accelerators for cementitious compositions. | |
JPS5395900A (en) | Production of fine rare earth elements carbonate powder | |
ES8202049A1 (en) | The production of a yellow iron oxide pigment. | |
JPS56169130A (en) | Manufacture of needlelike goethite | |
JPS53109898A (en) | Production of gypsum from copper-containing spent sulfuric acid | |
JPS53122673A (en) | Method of treating chromium-containing powdery substance | |
JPS5669231A (en) | Preparation of needlelike goethite | |
JPS5218496A (en) | Process for production of alpha-type gypsum hemi-hydrate from sulfur oxide in the waste gas | |
JPS53128149A (en) | Method of processing waste water from chromium plating | |
JPS54138896A (en) | Production of alpha-iron oxyhydroxide | |
JPS5580726A (en) | Production of needlelike goethite | |
JPS52123977A (en) | Sludge treatment | |
JPS52140499A (en) | Production of mixture or double salt of ammonium sulfate/nitrate by radiation treatment of exhaust gas | |
JPS5224188A (en) | Treatment of aluminum-sludge including phosphorus | |
JPS5435896A (en) | Production of zinc hydroxide plate crystals | |
JPS5577867A (en) | Method of controlling quality of pickles |