Title:
MANUFACTURE OF ACICULAR ULTRAFINE PARTICLE OF IRON OXYHYDROXIDE
Document Type and Number:
Japanese Patent JPS57113202
Kind Code:
A
Abstract:
PURPOSE: To prevent the damage of acicular ultrafine particles of iron oxyhydroxide by coating metallic phosphate on the surfaces of the particles in a range of 0.05/100W5/100 of a ratio of P to Fe.
CONSTITUTION: Aqueous solution of ferrous salt or a mixture of ferrous salt and ferric salt is neutralized with aqueous alkaline solution to produce insoluble matter and is oxidized with air. Then, ultrafine acicular iron oxyhydroxide is produced. Metallic phosphate may be coated on the surface of the particles at the time of completing the neutralization of iron salt aqueous solution and alkaline agent, completion of the oxidation, or temporarily baking paste obtained after washing and filtering, dry paste or dry material.
Inventors:
OOSHIMA KAZUFUMI
MATSUNAGA MITSUO
SEKIGUCHI HARUO
ISHIBASHI TOSHINORI
HORIMOTO TAKAHIRO
MATSUBA KOUJI
MATSUNAGA MITSUO
SEKIGUCHI HARUO
ISHIBASHI TOSHINORI
HORIMOTO TAKAHIRO
MATSUBA KOUJI
Application Number:
JP2681A
Publication Date:
July 14, 1982
Filing Date:
January 05, 1981
Export Citation:
Assignee:
MITSUI TOATSU CHEMICALS
International Classes:
B22F9/22; C01G49/02; C09D5/23; C09D7/12; G11B5/706; H01F1/06; H01F1/11; (IPC1-7): B22F9/24; C01G49/02; G11B5/70; H01F1/06; H01F1/11
Domestic Patent References:
| JPS52135897A | 1977-11-14 | |||
| JPS53114799A | 1978-10-06 | |||
| JPS5613409A | 1981-02-09 | |||
| JPS4926800A | 1974-03-09 | |||
| JPS5754206A | 1982-03-31 |