公开(公告)号：DE3610478A1

公开(公告)日：1987-10-01

申请号：DE3610478

申请日：1986-03-27

Applicant: BASF AG

Inventor： MUELLER NORBERT DR ,  LIEBERS ROBERT ,  FUECKS KARL ,  HONECKER GERHARD

IPC: B65D88/66 ,  B67C9/00 ,  B65G65/24 ,  B65G69/06

Abstract: At least two opposing thrust pieces (2', 4') which enclose the barrel in an operating position are accommodated in mounts (2, 4) which are arranged on both sides of a working plate (15) for the barrel (16) to be treated, at least one (4') of the said thrust pieces being displaceably guided in the mount (4) and being movable onto the fixed thrust piece (2) situated opposite by means of a hydraulic or pneumatic working cylinder (6).

公开(公告)号：DE3061361D1

公开(公告)日：1983-01-20

申请号：DE3061361

申请日：1980-10-16

Applicant: BASF AG

Inventor： OHLINGER MANFRED DR ,  VAETH GUENTER ,  MUELLER NORBERT DR ,  WETTSTEIN EUGEN

IPC: C01G37/00 ,  C01G37/027 ,  G11B5/62 ,  G11B5/706 ,  H01F1/11

Abstract: A process for the manufacture of ferromagnetic chromium dioxide modified with foreign elements, by reacting oxides of trivalent and hexavalent chromium under superatmospheric pressure at an elevated temperature in the presence of water and of antimony(III) oxide as modifier, with or without other modifiers in an amount not exceeding 15% by weight, wherein the antimony(III) oxide employed as modifier is, to the extent of more than one-third, present as the senarmontite cubic modification, has a specific surface area, measured by the BET method, of from 1.5 to 15 m2/g, and is added in a total amount of up to 0.5% by weight, based on the resulting chromium dioxide.

公开(公告)号：CH622233A5

公开(公告)日：1981-03-31

申请号：CH1277276

申请日：1976-10-08

Applicant: BASF AG

Inventor： HOFFMANN WERNER DR ,  MUELLER NORBERT DR ,  PAUST JOACHIM DR

IPC: C07B57/00 ,  C07B31/00 ,  C07C67/00 ,  C07C209/00 ,  C07C209/26 ,  C07C211/38 ,  C07D307/32 ,  C07B19/00 ,  C07C87/40

公开(公告)号：DE3876686D1

公开(公告)日：1993-01-28

申请号：DE3876686

申请日：1988-05-20

Applicant: BASF AG

Inventor： MUELLER NORBERT DR ,  OHLINGER MANFRED DR ,  FESER RAINER DR ,  BOETTCHER BERNHARD DR ,  RUDOLF PETER DR ,  HUEBNER WERNER

IPC: C01G37/027 ,  G11B5/706 ,  H01F1/11

Abstract: In the prodn. of stabilised acicular ferromagnetic chromium dioxide by conversion of Cr (III) and Cr (VI) oxides at 200-600 deg. C and 100-700 bars in a high pressure reactor in the presence of water with addn. of modifying agent(s) and then surface redn. in an aq. suspension to form a Cr (III) cpd. on the surfaces, the novelty is that 0.1-5.0% (by wt. of chromium dioxide) of a mono- or poly-basic 2-6C hydroxy carboxylic acid.

公开(公告)号：DE3766394D1

公开(公告)日：1991-01-10

申请号：DE3766394

申请日：1987-03-25

Applicant: BASF AG

Inventor： RUDOLF PETER DR ,  OHLINGER MANFRED DR ,  MUELLER NORBERT DR ,  HUEBNER WERNER

IPC: H01F1/11 ,  C01G37/027 ,  G11B5/706

公开(公告)号：DE3828498A1

公开(公告)日：1990-03-01

申请号：DE3828498

申请日：1988-08-23

Applicant: BASF AG

Inventor： MUELLER MICHAEL WOLFGANG DR ,  SCHWAB EKKEHARD DR ,  AUWETER HELMUT DR ,  FESER RAINER DR ,  HUEBNER WERNER ,  MUELLER NORBERT DR ,  OHLINGER MANFRED DR ,  DIKOW HERMANN DR

IPC: C01G37/027 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  H01F1/11

Abstract: The invention relates to a chromium dioxide material, consisting of needle-shaped, ferromagnetic chromium dioxide particles having a non-magnetic, hydrogenous surface protective layer, which is distinguished by an improved stability against chemical decomposition, a process for its preparation and magnetic recording material containing this chromium dioxide with high long-term climatic stability of the remanent magnetisation.

公开(公告)号：DE3575218D1

公开(公告)日：1990-02-08

申请号：DE3575218

申请日：1985-07-30

Applicant: BASF AG

Inventor： OHLINGER MANFRED DR ,  MUELLER NORBERT DR ,  PETER RUDOLF DR ,  WETTSTEIN EUGEN

IPC: H01F1/11 ,  C01G37/027 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706

Abstract: Ferromagnetic chromium dioxide is prepared by converting oxides of trivalent and hexavalent chromium under superatmospheric pressure and at elevated temperatures in the presence of water and with the addition of an antimony compound as a modifier and, if required, further additives in an amount of not more than 15% by weight, by a method in which the antimony compound is present in the form of a water-soluble salt whose anion contains one or more organic molecular moieties which are oxidized in concentrated chromic acid.

公开(公告)号：DE3801455A1

公开(公告)日：1989-08-03

申请号：DE3801455

申请日：1988-01-20

Applicant: BASF AG

Inventor： STOCKBURGER DIETER DR ,  FESER RAINER DR ,  GRAMMATIS ZAFIRIOS DR ,  MUELLER NORBERT DR ,  OHLINGER MANFRED DR ,  REINICKE HELMUT DR ,  SARTOR KARL-HEINZ ,  SCHLINDWEIN HEINZ ,  STECK WERNER DR

IPC: C01G37/02 ,  C01G37/027

公开(公告)号：DE3513723A1

公开(公告)日：1986-10-23

申请号：DE3513723

申请日：1985-04-17

Applicant: BASF AG

Inventor： OHLINGER MANFRED DR ,  MUELLER NORBERT DR ,  RUDOLF PETER DR ,  WETTSTEIN EUGEN

IPC: H01F1/11 ,  C01G37/027 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  C01G37/00 ,  C04B35/12

Abstract: Ferromagnetic chromium dioxide is prepared by converting oxides of trivalent and hexavalent chromium under superatmospheric pressure and at elevated temperatures in the presence of water and with the addition of an antimony compound as a modifier and, if required, further additives in an amount of not more than 15% by weight, by a method in which the antimony compound is present in the form of a water-soluble salt whose anion contains one or more organic molecular moieties which are oxidized in concentrated chromic acid.

公开(公告)号：CH598243A5

公开(公告)日：1978-04-28

申请号：CH313076

申请日：1976-03-12

Applicant: BASF AG

Inventor： HOFFMANN WERNER DR ,  MUELLER NORBERT DR ,  FRAUENBERG KARL VON DR

IPC: C07D311/94 ,  C07D313/00

Abstract: New macrocyclic ketolactones, especially 15-methyl-15-ethyl- and 15,15-dimethyl-12-oxo-15-hydroxytetradecanecarboxylic acid lactone.