公开(公告)号：DE3885380D1

公开(公告)日：1993-12-09

申请号：DE3885380

申请日：1988-08-23

Applicant: BASF AG

Inventor： MEYER BERND DR ,  STECK WERNER DR ,  BOETTCHER BERNHARD DR ,  JAKUSCH HELMUT DR ,  FESER RAINER DR

IPC: C01G37/02 ,  C01G37/027 ,  G11B5/706 ,  H01F1/10

公开(公告)号：DE4103251A1

公开(公告)日：1991-08-14

申请号：DE4103251

申请日：1991-02-04

Applicant: BASF AG

Inventor： STECK WERNER DR ,  LERMER HELMUT DR ,  RUST HARALD ,  SIEGEL HARDO DR

IPC: C07C51/08 ,  C07C213/02 ,  C07C231/06 ,  C07C255/36

Abstract: 4-Hydroxyphenylacetonitrile (I) is produced by the gas-phase reaction of 4-methoxyphenylacetonitrile (II) at 280-4500 deg.C and 0.01-50 bar on zeolites or structurally-related Al-contg. phosphates (III) in the presence of water vapour. Pref. (III) is a pentasil, alumino, gallium- or borosilicate zeolite, a pentasil zeolite contg. at least 2 of the above elements as tetrahedral cations in the pentasil lattice, a zeolite of the faujasite or mordenite type, or a crystalline Al-contg. phosphate with a mol. sieve structure, obtd. by a hydrothermal process. USE/ADVANTAGE - Useful for the prodn. of 2-(4-hydroxyphenyl)-ethylamine, 4-hydroxyphenylacetic acid and 4-hydroxyphenylacetamide (claimed). Provides an improved process for heterogeneous catalytic hydrolysis of a phenol ether, without the disadvantages of prior-art homogeneous processes (e.g., laborious sepn. of catalyst, reduced yield due to further reaction of the prod. with the catalyst).

公开(公告)号：DE3677402D1

公开(公告)日：1991-03-14

申请号：DE3677402

申请日：1986-04-11

Applicant: BASF AG

Inventor： ARNDT VOLKER DR ,  MEYER BERND DR ,  STECK WERNER DR ,  JAKUSCH HELMUT DR

IPC: C01G49/00 ,  C01G49/06 ,  G11B5/706 ,  H01F1/10 ,  H01F1/11

公开(公告)号：DE3815292A1

公开(公告)日：1989-11-16

申请号：DE3815292

申请日：1988-05-05

Applicant: BASF AG

Inventor： STECK WERNER DR ,  LERMER HELMUT DR ,  RUST HARALD ,  FRITZ GERHARD DR ,  SIEGEL HARDO DR

IPC: B01J29/86 ,  B01J29/40 ,  B01J29/88 ,  C07B61/00 ,  C07C45/00 ,  C07C45/65 ,  C07C45/67 ,  C07C47/565 ,  C07C67/00

Abstract: Hydroxybenzaldehydes of the formula (I) are prepared from a benzaldehyde of the formula (II) or its acetal, in which R1 in the R1O-phenyl ether group is an alkyl, cycloalkyl, alkylcycloalkyl or alkylaryl radical, R2 is H or OH or is identical to R1 and one or more R1O-phenyl ether groups are ortho, meta or para to the aldehyde function, by a process in which a benzaldehyde of the formula (II) or its acetal, in which R1 and R2 have the abovementioned meanings and one or more R1O-phenyl ether groups occupy the abovementioned position with respect to the aldehyde function, is converted into a hydroxybenzaldehyde of the formula (I) in the presence of water over a zeolite as a heterogeneous catalyst. The catalysts used are, in particular, zeolites of the pentasil type.

公开(公告)号：DE3664826D1

公开(公告)日：1989-09-07

申请号：DE3664826

申请日：1986-09-30

Applicant: BASF AG

Inventor： STECK WERNER DR ,  HABERKORN HERBERT DR ,  MAROSI LASZLO DR ,  HUEBNER WERNER ,  JAKUSCH HELMUT DR

IPC: H01F1/11 ,  C01G37/027 ,  G11B5/706 ,  H01F1/10

Abstract: Ferromagnetic chromium dioxide is improved by subjecting chromium dioxide materials prepared by a known method to an additional heat treatment.

公开(公告)号：DE3728453A1

公开(公告)日：1989-03-09

申请号：DE3728453

申请日：1987-08-26

Applicant: BASF AG

Inventor： MEYER BERND DR ,  STECK WERNER DR ,  BOETTCHER BERNHARD DR ,  JAKUSCH HELMUT DR ,  FESER RAINER DR

IPC: C01G37/02 ,  C01G37/027 ,  G11B5/706 ,  H01F1/10

公开(公告)号：DE3603431A1

公开(公告)日：1987-08-06

申请号：DE3603431

申请日：1986-02-05

Applicant: BASF AG

Inventor： HOPPE KLAUS-DIETER DR ,  STECK WERNER DR ,  KOVACS JENOE DR ,  FESER RAINER DR ,  JAKUSCH HELMUT DR

IPC: B22F9/22 ,  C01G49/06 ,  G11B5/706 ,  G11B5/712 ,  B22F9/16 ,  C09C1/62 ,  C09C3/00

Abstract: The invention relates to a process for preparing ferromagnetic metal particles consisting essentially of iron, starting from an acicular alpha -FeOOH which, after a shape-stabilising dressing on the particle surface, is heat-treated at from 500 to 850 DEG C and subsequently reduced by means of gaseous reducing agents (reductants) at from 200 to 500 DEG C to the metal, the alpha -FeOOH used being prepared in the presence of zinc and phosphate ions.

公开(公告)号：DE3514008A1

公开(公告)日：1986-10-23

申请号：DE3514008

申请日：1985-04-18

Applicant: BASF AG

Inventor： ARNDT VOLKER DR ,  MEYER BERND DR ,  STECK WERNER DR ,  JAKUSCH HELMUT DR

IPC: C01G49/00 ,  C01G49/06 ,  G11B5/706 ,  H01F1/10 ,  H01F1/11

公开(公告)号：DE3438093A1

公开(公告)日：1986-04-24

申请号：DE3438093

申请日：1984-10-18

Applicant: BASF AG

Inventor： STECK WERNER DR ,  JAKUSCH HELMUT DR

IPC: C01G49/00 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  G11B5/712 ,  H01F1/11 ,  H01F10/20 ,  B05D5/12

Abstract: Ferrimagnetic particles which are useful as magnetic material for magnetic recording media and consist of a core of a magnetic material exhibiting multiaxial anisotropy and a coating which surrounds the core and is composed of a magnetic material possessing uniaxial anisotropy, and a process for their preparation.

公开(公告)号：DE3413752A1

公开(公告)日：1985-10-24

申请号：DE3413752

申请日：1984-04-12

Applicant: BASF AG

Inventor： STECK WERNER DR ,  FESER RAINER DR ,  JAKUSCH HELMUT DR ,  RUDOLF PETER DR ,  VAETH GUENTHER ,  KULLMANN UDO DR

IPC: C01G49/00 ,  G11B5/706 ,  H01F1/10 ,  B05D5/12 ,  C04B35/26 ,  G11B5/62 ,  H01F10/20