JPS56169131A - Manufacture of needlelike goethite - Google Patents

Manufacture of needlelike goethite

Info

Publication number
JPS56169131A
JPS56169131A JP6960280A JP6960280A JPS56169131A JP S56169131 A JPS56169131 A JP S56169131A JP 6960280 A JP6960280 A JP 6960280A JP 6960280 A JP6960280 A JP 6960280A JP S56169131 A JPS56169131 A JP S56169131A
Authority
JP
Japan
Prior art keywords
oxidizing agent
ferrous
ratio
anions
precipitate
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
Application number
JP6960280A
Other languages
Japanese (ja)
Inventor
Toshihiro Hamahata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Corp
Original Assignee
TDK Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TDK Corp filed Critical TDK Corp
Priority to JP6960280A priority Critical patent/JPS56169131A/en
Publication of JPS56169131A publication Critical patent/JPS56169131A/en
Pending legal-status Critical Current

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  • Compounds Of Iron (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE: To reduce the particle size and to increase the axial ratio by adding alkali and an oxidizing agent to a ferrous salt soln. to precipitate and age ferrous hydroxide, adjusting the ratio of anions to ferrous ions, and blowing a gaseous oxidizing agent to carry out oxidation at ≤80°C.
CONSTITUTION: Alkali and an oxidizing agent are added to a ferrous salt soln. to precipitate and age ferrous hydroxide at ≥11pH, and the ratio of anions to ferrous ions is adjusted to ≤1. A gaseous oxidizing agent selected from air, oxygen enriched air and oxygen is then blown to carry out oxidation at ≤80°C, thereby manufacturing needlelike goethite. Said oxidizing agent is selected from potassium chlorate, sodium chlorate, sodium nitrate and potassium nitrate.
COPYRIGHT: (C)1981,JPO&Japio
JP6960280A 1980-05-27 1980-05-27 Manufacture of needlelike goethite Pending JPS56169131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6960280A JPS56169131A (en) 1980-05-27 1980-05-27 Manufacture of needlelike goethite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6960280A JPS56169131A (en) 1980-05-27 1980-05-27 Manufacture of needlelike goethite

Publications (1)

Publication Number Publication Date
JPS56169131A true JPS56169131A (en) 1981-12-25

Family

ID=13407541

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6960280A Pending JPS56169131A (en) 1980-05-27 1980-05-27 Manufacture of needlelike goethite

Country Status (1)

Country Link
JP (1) JPS56169131A (en)

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