JPS55167135A - Manufacture of yellow iron oxide - Google Patents
Manufacture of yellow iron oxideInfo
- Publication number
- JPS55167135A JPS55167135A JP7428079A JP7428079A JPS55167135A JP S55167135 A JPS55167135 A JP S55167135A JP 7428079 A JP7428079 A JP 7428079A JP 7428079 A JP7428079 A JP 7428079A JP S55167135 A JPS55167135 A JP S55167135A
- Authority
- JP
- Japan
- Prior art keywords
- soln
- oxidation
- ferrous sulfate
- iron oxide
- ferrous
- 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)
Abstract
PURPOSE: To obtain high quality yellow iron oxide with no unevenness every lot by carrying out neutralization and oxidation of part of charged divalent iron salt in at least two stages when seed goethite is prepared in a seed process.
CONSTITUTION: An aqueous soln. contg. 0.3W1.3mol/l of ferrous sulfate is prepared and maintained at 20W35°C in an inert gas atmosphere. By adding alkali, the soln. is neutralized so that 5W30% of the ferrous sulfate is converted into ferrous hydroxide, and by blowing oxygen-contg. gas, the soln. is oxidized until the pH is lowered to 3W4. Alkali is further added to convert 5W30% of the ferrous sulfate into ferrous hydroxide, and oxidation is carried out. After carrying out such partial neutralization and oxidation twice or more the soln. is aged at 40W80°C in an inert gas atmosphere for 0.5W3hr, and then grain growing reaction is induced by a usual method.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7428079A JPS589052B2 (en) | 1979-06-12 | 1979-06-12 | Production method of yellow iron oxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7428079A JPS589052B2 (en) | 1979-06-12 | 1979-06-12 | Production method of yellow iron oxide |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55167135A true JPS55167135A (en) | 1980-12-26 |
JPS589052B2 JPS589052B2 (en) | 1983-02-18 |
Family
ID=13542534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7428079A Expired JPS589052B2 (en) | 1979-06-12 | 1979-06-12 | Production method of yellow iron oxide |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS589052B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61140110A (en) * | 1984-12-12 | 1986-06-27 | Ishihara Sangyo Kaisha Ltd | Manufacture of acicular alpha-feooh for magnetic recording material |
US4806335A (en) * | 1986-11-22 | 1989-02-21 | Chisso Corporation | Process for producing acicular iron α-oxyhydroxide particle powder |
JPH01176231A (en) * | 1987-12-29 | 1989-07-12 | Kawasaki Steel Corp | Method for producing multi-stage seed in goethite production |
US5399278A (en) * | 1991-05-31 | 1995-03-21 | Toda Kogyo Corp. | Process for producing acicular goethite particles and acicular magnetic iron oxide particles |
-
1979
- 1979-06-12 JP JP7428079A patent/JPS589052B2/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61140110A (en) * | 1984-12-12 | 1986-06-27 | Ishihara Sangyo Kaisha Ltd | Manufacture of acicular alpha-feooh for magnetic recording material |
JPH0415601B2 (en) * | 1984-12-12 | 1992-03-18 | Ishihara Sangyo Kaisha | |
US4806335A (en) * | 1986-11-22 | 1989-02-21 | Chisso Corporation | Process for producing acicular iron α-oxyhydroxide particle powder |
JPH01176231A (en) * | 1987-12-29 | 1989-07-12 | Kawasaki Steel Corp | Method for producing multi-stage seed in goethite production |
US5399278A (en) * | 1991-05-31 | 1995-03-21 | Toda Kogyo Corp. | Process for producing acicular goethite particles and acicular magnetic iron oxide particles |
Also Published As
Publication number | Publication date |
---|---|
JPS589052B2 (en) | 1983-02-18 |
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