JPS6433019A - Production of acicular alpha-iron oxyhydroxide - Google Patents
Production of acicular alpha-iron oxyhydroxideInfo
- Publication number
- JPS6433019A JPS6433019A JP18537487A JP18537487A JPS6433019A JP S6433019 A JPS6433019 A JP S6433019A JP 18537487 A JP18537487 A JP 18537487A JP 18537487 A JP18537487 A JP 18537487A JP S6433019 A JPS6433019 A JP S6433019A
- Authority
- JP
- Japan
- Prior art keywords
- compd
- aluminum
- silicon
- soln
- suspension
- 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)
Abstract
PURPOSE:To obtain the title alpha-iron oxyhydroxide having an excelent acicular form keeping property even in a reduction stage and capable of coping with the ferromagnetic particles having a desired magnetic characteristic by supplying an aluminum or silicon compd. in the oxidation process of ferrous hydroxide. CONSTITUTION:An aq. soln. of a ferrous salt is allowed to react with an aq. soln. of an alkali metal hydroxide to obtain a suspension of ferrous hydroxide, and an oxygen-contg. gas is supplied to the suspension while adding an aq. soln. of an aluminum compd. and/or a silicon compd. to the suspension. A water- soluble compd. such as AlCl3, Al2(SO4)3, and NaAlO2 is preferably used as the aluminum compd., and a water-soluble compd. such as Na2SiO3 or Na2Si2O5 is preferably used as the silicon compd. The aq. solns. of an aluminum compd. and a silicon compd. can be continuously or intermittently added while supplying an oxygen-contg. gas.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18537487A JPS6433019A (en) | 1987-07-27 | 1987-07-27 | Production of acicular alpha-iron oxyhydroxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18537487A JPS6433019A (en) | 1987-07-27 | 1987-07-27 | Production of acicular alpha-iron oxyhydroxide |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6433019A true JPS6433019A (en) | 1989-02-02 |
Family
ID=16169684
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18537487A Pending JPS6433019A (en) | 1987-07-27 | 1987-07-27 | Production of acicular alpha-iron oxyhydroxide |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6433019A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0285302A (en) * | 1988-08-06 | 1990-03-26 | Bayer Ag | Iron base needle like alloy powder, and production and use thereof |
JPH0597442A (en) * | 1991-10-01 | 1993-04-20 | Mitsui Mining & Smelting Co Ltd | Production of acicular alpha-iron oxyhydroxide |
-
1987
- 1987-07-27 JP JP18537487A patent/JPS6433019A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0285302A (en) * | 1988-08-06 | 1990-03-26 | Bayer Ag | Iron base needle like alloy powder, and production and use thereof |
JPH0597442A (en) * | 1991-10-01 | 1993-04-20 | Mitsui Mining & Smelting Co Ltd | Production of acicular alpha-iron oxyhydroxide |
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