公开(公告)号：EP0305069A2

公开(公告)日：1989-03-01

申请号：EP88307226.6

申请日：1988-08-04

申请人： Chisso Corporation

发明人： Nakagawa, Etsuo ,  Niwano, Masaru ,  Yamamoto, Tetsushi ,  I, Jiro

IPC分类号： B22F1/02 ,  G11B5/712 ,  C23C8/12 ,  H01F1/06 ,  B22F1/00

CPC分类号： G11B5/712 ,  B22F1/0088

摘要： A process for producing a ferromagnetic metal powder composed mainly of iron and having an oxidized coating and a superior dispersibility is provided, which process comprises feeding granules of a ferromagnetic metal powder composed mainly of iron and impregnated with an organic solvent into a horizontal, cylindrical, rotating type reactor having scraping plates fixed onto the inner wall thereof in parallel to the generating line thereof, passing an oxygen-containing gas through the reactor while rotating the reactor and keeping the inside temperature thereof at 10° to 80°C to vaporize off the solvent and dry the granules, and then continuously or stepwise raising the temperature of the resulting material on heating while passing an oxygen-containing gas through the inside of the reactor.

摘要翻译： 一种用于制造主要是铁构成的铁磁性金属粉末，并且具有氧化的涂层和优异的分散过程提供，该方法包括主要由铁组成并在有机溶剂浸渍的铁磁性金属粉末的进料颗粒成水平，圆柱形， 旋转具有刮在平行于它们的母线其固定到内壁板型反应器，使含有氧的气体通过反应器，同时旋转该反应器和在10℃保持内部温度其至80℃，以蒸发掉 溶剂和干燥颗粒，然后连续或逐步提高得到的材料的温度上加热，同时使含氧气体在通过反应器的内部。

公开(公告)号：EP0305069B1

公开(公告)日：1994-05-04

申请号：EP88307226.6

申请日：1988-08-04

申请人： Chisso Corporation

发明人： Nakagawa, Etsuo ,  Niwano, Masaru ,  Yamamoto, Tetsushi ,  I, Jiro

IPC分类号： B22F1/02 ,  G11B5/712 ,  C23C8/12 ,  H01F1/06 ,  B22F1/00

CPC分类号： G11B5/712 ,  B22F1/0088

公开(公告)号：EP0269361A2

公开(公告)日：1988-06-01

申请号：EP87310171.1

申请日：1987-11-18

申请人： Chisso Corporation

发明人： Saito, Masayoshi ,  I, Jiro

IPC分类号： C01G49/06 ,  C01G49/02

CPC分类号： B82Y30/00 ,  C01G49/06 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  G11B5/70663

摘要： A process for producing acicular α-FeOOH particles having a narrow particle size distribution and recitified shape and being highly dispersed, which process comprises mixing with stirring an aqueous solution of a Fe(II) salt with an aqueous solution of an alkali in an equivalent ratio of alkali to Fe(II) salt of 1.5 or more, oxidizing the mixture with a O₂-containing gas, heat treating the resulting suspension of iron α-FeOOH particles to 60° to 100°C, further adding an aqueous solution of a Fe(II) salt in a proportion of Fe(II) to α-FeOOH of 0.5 to 10% and again oxidizing the mixture with a O₂-containing gas at 35° to 55°C.

摘要翻译： 一种制备具有窄粒度分布和再现形状并且高度分散的针状α-FeO​​OH颗粒的方法，该方法包括将Fe（II）盐水溶液与碱的水溶液以相当比例搅拌混合 的碱金属与Fe（II）盐的比例为1.5以上，用含O2气体氧化混合物，将得到的铁α-FeO​​OH颗粒悬浮液热处理至60〜100℃，再加入Fe （II）与Fe-FeOOH的比例为0.5〜10％，并再次在含有氧气的温度下在35〜55℃下氧化该混合物。

公开(公告)号：EP0269361B1

公开(公告)日：1993-01-13

申请号：EP87310171.1

申请日：1987-11-18

申请人： Chisso Corporation

发明人： Saito, Masayoshi ,  I, Jiro

IPC分类号： C01G49/06 ,  C01G49/02

CPC分类号： B82Y30/00 ,  C01G49/06 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  G11B5/70663

公开(公告)号：EP0305069A3

公开(公告)日：1990-07-11

申请号：EP88307226.6

申请日：1988-08-04

申请人： Chisso Corporation

发明人： Nakagawa, Etsuo ,  Niwano, Masaru ,  Yamamoto, Tetsushi ,  I, Jiro

IPC分类号： B22F1/02 ,  G11B5/712 ,  C23C8/12 ,  H01F1/06 ,  B22F1/00

CPC分类号： G11B5/712 ,  B22F1/0088

摘要： A process for producing a ferromagnetic metal powder composed mainly of iron and having an oxidized coating and a superior dispersibility is provided, which process comprises feeding granules of a ferromagnetic metal powder composed mainly of iron and impregnated with an organic solvent into a horizontal, cylindrical, rotating type reactor having scraping plates fixed onto the inner wall thereof in parallel to the generating line thereof, passing an oxygen-containing gas through the reactor while rotating the reactor and keeping the inside temperature thereof at 10° to 80°C to vaporize off the solvent and dry the granules, and then continuously or stepwise raising the temperature of the resulting material on heating while passing an oxygen-containing gas through the inside of the reactor.

公开(公告)号：EP0269361A3

公开(公告)日：1990-01-17

申请号：EP87310171.1

申请日：1987-11-18

申请人： Chisso Corporation

发明人： Saito, Masayoshi ,  I, Jiro

IPC分类号： C01G49/06 ,  C01G49/02

CPC分类号： B82Y30/00 ,  C01G49/06 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  G11B5/70663

摘要： A process for producing acicular α-FeOOH particles having a narrow particle size distribution and recitified shape and being highly dispersed, which process comprises mixing with stirring an aqueous solution of a Fe(II) salt with an aqueous solution of an alkali in an equivalent ratio of alkali to Fe(II) salt of 1.5 or more, oxidizing the mixture with a O₂-containing gas, heat treating the resulting suspension of iron α-FeOOH particles to 60° to 100°C, further adding an aqueous solution of a Fe(II) salt in a proportion of Fe(II) to α-FeOOH of 0.5 to 10% and again oxidizing the mixture with a O₂-containing gas at 35° to 55°C.