发明申请
- 专利标题: Method for preparing iron oxides
- 专利标题(中): 铁氧化物的制备方法
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申请号: US12218158申请日: 2008-07-11
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公开(公告)号: US20090324487A1公开(公告)日: 2009-12-31
- 发明人: Esterino Conca , Carlo Rubini , Guido Petrini
- 申请人: Esterino Conca , Carlo Rubini , Guido Petrini
- 申请人地址: IT Milano
- 专利权人: SUD Chemie MT S.r.l.
- 当前专利权人: SUD Chemie MT S.r.l.
- 当前专利权人地址: IT Milano
- 优先权: ITMI2002A000567 20020318
- 主分类号: C01G49/02
- IPC分类号: C01G49/02
摘要:
Highly pure iron oxides are prepared by reaction of metallic iron, in the form of microspheroidal particles or of scraps or cuttings, with an agitated aqueous solution of a mono- or polycarboxylic acid with a pKa of 0.5 to 6 relative to the first carboxyl and capable of decomposing, by heating in air at 200 to 350° C., to carbon dioxide and water, using 0.03 to 1.5 moles of acid per g-atoms of iron, a water/iron weight ration of 1 to 20, and by oxidation of the ferrous carboxilate to ferric salt, with an agent selected from oxygen, mixtures containing oxygen, hydrogen peroxide, organic peroxides and hydroperoxides.