JPS57166322A - Preparation of goethite - Google Patents

Preparation of goethite

Info

Publication number
JPS57166322A
JPS57166322A JP56051091A JP5109181A JPS57166322A JP S57166322 A JPS57166322 A JP S57166322A JP 56051091 A JP56051091 A JP 56051091A JP 5109181 A JP5109181 A JP 5109181A JP S57166322 A JPS57166322 A JP S57166322A
Authority
JP
Japan
Prior art keywords
suspension
hydroxide
gas
aqueous solution
oxidizing state
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
Application number
JP56051091A
Other languages
Japanese (ja)
Other versions
JPH028970B2 (en
Inventor
Nobuhiro Fukuda
Kazufumi Oshima
Mitsuo Matsunaga
Kiyotake Morita
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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
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 Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP56051091A priority Critical patent/JPS57166322A/en
Publication of JPS57166322A publication Critical patent/JPS57166322A/en
Publication of JPH028970B2 publication Critical patent/JPH028970B2/ja
Granted legal-status Critical Current

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

Abstract

PURPOSE: To prepare goethite having sharp particle size distribution, by feeding a ferrous salt solution and an alkaline aqueous solution continuously to a tank, and circulating the produced suspension of hydroxide to a tank of non-oxidizing state through a circulation path, wherein a part of said path is in oxidizing state and the rest part of the path is in non-oxidizing state.
CONSTITUTION: A ferrous salt solution, e.g. aqueous solution of ferrous sulfate, and an alkaline aqueous solution, e.g. aqueous solution of caustic soda, are fed to a mixer 3 through the pumps 1, 2, and mixed together to obtain hydroxide. The hydroxide suspension is sent to the tank4 which is made to non-oxidizing state by introducing nitrogen gas through the pipe 5. After charging a definite amount of the suspension, the supply is stopped, and the pump 7 is operated to extract a part of the hydroxide suspension and circulate through the circulation path 6. The circulation path 6 is supplied with air by the gas-introducing means 9, and the air is mixed with the suspension in the gas-liquid mixer 8 to effect the oxidation of the hydroxide in the suspension. The suspension discharged from the gas-liquid mixer 8 is transferred to the gas-liquid separator 10, in which air is separated from the suspension restoring the suspension to the non- oxidizing state.
COPYRIGHT: (C)1982,JPO&Japio
JP56051091A 1981-04-07 1981-04-07 Preparation of goethite Granted JPS57166322A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56051091A JPS57166322A (en) 1981-04-07 1981-04-07 Preparation of goethite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56051091A JPS57166322A (en) 1981-04-07 1981-04-07 Preparation of goethite

Publications (2)

Publication Number Publication Date
JPS57166322A true JPS57166322A (en) 1982-10-13
JPH028970B2 JPH028970B2 (en) 1990-02-28

Family

ID=12877137

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56051091A Granted JPS57166322A (en) 1981-04-07 1981-04-07 Preparation of goethite

Country Status (1)

Country Link
JP (1) JPS57166322A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62230624A (en) * 1986-03-29 1987-10-09 Ngk Insulators Ltd Apparatus for synthesizing iron oxide
US4748017A (en) * 1986-01-17 1988-05-31 Showa Denko Kabushiki Kaisha Method for manufacturing lepidocrocite

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4748017A (en) * 1986-01-17 1988-05-31 Showa Denko Kabushiki Kaisha Method for manufacturing lepidocrocite
JPS62230624A (en) * 1986-03-29 1987-10-09 Ngk Insulators Ltd Apparatus for synthesizing iron oxide

Also Published As

Publication number Publication date
JPH028970B2 (en) 1990-02-28

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