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    14.
    发明专利
    未知

    公开(公告)号：DE3940347A1

    公开(公告)日：1991-06-13

    申请号：DE3940347

    申请日：1989-12-06

    Applicant: BASF AG

    Inventor： EBENHOECH FRANZ LUDWIG DR ,  SCHLEGEL REINHOLD

    IPC: B22F1/00 ,  B22F9/30

    Abstract: Iron whiskers are produced by thermal decomposition of iron pentacarbonyl vapor in an indirectly heated empty-space decomposer in which the cross-sectional area for entry of the iron pentacarbonyl into the empty-space decomposer is from 10 to 40% of the cross-sectional area of the empty-space decomposer, the mass flow density of the iron pentacarbonyl vapor, based on the cross-sectional area of the decomposer, is from 0.01 to 0.07 kg per square meter per second, and the temperature in the empty-space decomposer should at no point be below 360 DEG C.

    15.
    发明专利
    未知

    公开(公告)号：DE3428121A1

    公开(公告)日：1986-02-13

    申请号：DE3428121

    申请日：1984-07-31

    Applicant: BASF AG

    Inventor： EBENHOECH FRANZ LUDWIG DR ,  SCHLEGEL REINHOLD

    IPC: B22F9/30 ,  B22F9/18 ,  C01G49/00

    Abstract: Iron powder is prepared by thermal decomposition of iron pentacarbonyl in a cavity decomposer, with an average amount of from 4 to 8 kg per m2 per hour of iron carbonyl striking the heating surface, by a process in which the velocity of the inflowing stream is brought to about 0.2-4 kg per m2 per second of carbonyl vapor or vapor/inert gas mixture by changing the inlet cross-section.

    16.
    发明专利
    未知

    公开(公告)号：AT230322T

    公开(公告)日：2003-01-15

    申请号：AT98107122

    申请日：1998-04-20

    Applicant: BASF AG

    Inventor： SIMON JOACHIM DR ,  SCHLEGEL REINHOLD ,  LEUTNER BERND DR

    IPC: B22F9/16 ,  B22F9/12 ,  B22F9/30 ,  C22B5/20 ,  H01F1/20 ,  H01F1/24

    Abstract: Production of Si-containing Fe powder comprises thermally decomposing a gas mixture containing Fe-pentacarbonyl and a volatile Si-compound. The volatile Si-compound is a silane or organosilane, except triethylsilane and tetraethoxysilane. Also claimed is an apparatus for carrying out the process comprising: (a) a heated decomposition pipe; (b) a device for adjusting two different temperature zones; (c) a device for vaporising liquid Fe-pentacarbonyl; (d) a device for dosing and mixing gases; and (e) a separator for Si-containing Fe powder.

    17.
    发明专利
    未知

    公开(公告)号：DE59805858D1

    公开(公告)日：2002-11-14

    申请号：DE59805858

    申请日：1998-02-18

    Applicant: BASF AG

    Inventor： LEUTNER BERND ,  FRIEDRICH GABRIELE ,  SCHLEGEL REINHOLD

    IPC: B22F9/16 ,  B22F1/00 ,  B22F9/28 ,  B22F9/30 ,  C22C33/02 ,  C22C38/00

    Abstract: A process for producing finely divided phosphorus-containing iron involves gaseous phase reaction of iron pentacarbonyl with a phosphorus compound, preferably phosphine. Preferably, the reaction is carried out in the presence of ammonia at above 200 degrees C. Also claimed is a finely divided phosphorus-containing iron which consists of spherical particles with 1-10 mu mean particle diameter or of filament aggregates of spheres with 0.2-3 mu diameter. Preferably, the iron contains 0.1-50 wt.% P, less than 1 wt.% C, less than 1 wt.% N, less than 0.5 wt.% H and less than 0.1 wt.% total of other impurity elements and is produced by the above process. Further claimed is apparatus for carrying out the above process, including a heated decomposition tube, devices for producing two different temperature zones, for evaporating liquid iron pentacarbonyl and for gas dosing and mixing, and a separator for finely divided phosphorus-containing iron.

    18.
    发明专利
    未知

    公开(公告)号：DE19716882A1

    公开(公告)日：1998-10-29

    申请号：DE19716882

    申请日：1997-04-22

    Applicant: BASF AG

    Inventor： SIMON JOACHIM DR ,  SCHLEGEL REINHOLD ,  LEUTNER BERND DR

    IPC: B22F9/16 ,  B22F9/12 ,  B22F9/30 ,  C22B5/20 ,  H01F1/20 ,  H01F1/24

    Abstract: Production of Si-containing Fe powder comprises thermally decomposing a gas mixture containing Fe-pentacarbonyl and a volatile Si-compound. The volatile Si-compound is a silane or organosilane, except triethylsilane and tetraethoxysilane. Also claimed is an apparatus for carrying out the process comprising: (a) a heated decomposition pipe; (b) a device for adjusting two different temperature zones; (c) a device for vaporising liquid Fe-pentacarbonyl; (d) a device for dosing and mixing gases; and (e) a separator for Si-containing Fe powder.

    19.
    发明专利
    未知

    公开(公告)号：DE19706524A1

    公开(公告)日：1998-08-20

    申请号：DE19706524

    申请日：1997-02-19

    Applicant: BASF AG

    Inventor： LEUTNER BERND DR ,  FRIEDRICH GABRIELE DR ,  SCHLEGEL REINHOLD

    IPC: B22F9/16 ,  B22F1/00 ,  B22F9/28 ,  B22F9/30 ,  C22C33/02 ,  C22C38/00 ,  B22F9/18

    Abstract: A process for producing finely divided phosphorus-containing iron involves gaseous phase reaction of iron pentacarbonyl with a phosphorus compound, preferably phosphine. Preferably, the reaction is carried out in the presence of ammonia at above 200 degrees C. Also claimed is a finely divided phosphorus-containing iron which consists of spherical particles with 1-10 mu mean particle diameter or of filament aggregates of spheres with 0.2-3 mu diameter. Preferably, the iron contains 0.1-50 wt.% P, less than 1 wt.% C, less than 1 wt.% N, less than 0.5 wt.% H and less than 0.1 wt.% total of other impurity elements and is produced by the above process. Further claimed is apparatus for carrying out the above process, including a heated decomposition tube, devices for producing two different temperature zones, for evaporating liquid iron pentacarbonyl and for gas dosing and mixing, and a separator for finely divided phosphorus-containing iron.

    20.
    发明专利
    未知

    公开(公告)号：DK0777706T3

    公开(公告)日：1998-03-30

    申请号：DK95930459

    申请日：1995-08-16

    Applicant: BASF AG

    Inventor： KORMANN CLAUDIUS ,  SCHWAB EKKEHARD ,  SCHLEGEL REINHOLD

    IPC: A61B5/055 ,  A61K49/18 ,  C01G49/06 ,  C01G49/08 ,  C09C1/24 ,  C09D17/00 ,  G01R33/28 ,  G11B5/706

    Abstract: PCT No. PCT/EP95/03230 Sec. 371 Date Feb. 18, 1997 Sec. 102(e) Date Feb. 18, 1997 PCT Filed Aug. 16, 1995 PCT Pub. No. WO96/06891 PCT Pub. Date Mar. 7, 1996 gamma -Fe2O3 pigments and Fe3O4 pigments with a particle diameter of 2 to 100 nm, a saturation magnetization above 40 nTm3/g, a remanence below 10 nTm3/g, a Cr content below 40 mg/kg of pigment, a Cu content below 40 mg/kg of pigment and C content below 100 mg/kg of pigment and aqueous suspension of these pigments. The pigments are used in aqueous suspension in the medical sector, in particular as contrast agents in magnetic resonance imaging.

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