公开(公告)号：AU3734101A

公开(公告)日：2001-08-14

申请号：AU3734101

申请日：2001-01-25

Applicant: BASF AG

Inventor： RUDOLF PETER ,  RIEBER NORBERT ,  BARTH THOMAS

IPC: C07C51/353 ,  C07C67/347 ,  C07C57/10 ,  C07C69/587

公开(公告)号：DE10004911A1

公开(公告)日：2001-08-09

申请号：DE10004911

申请日：2000-02-04

Applicant: BASF AG

Inventor： RUDOLF PETER ,  RIEBER NORBERT ,  BARTH THOMAS

IPC: C07C51/353 ,  C07C67/347 ,  B01J31/20 ,  B01J31/24 ,  C07C57/10 ,  C07C69/587

Abstract: Preparation of sorbic acid and its esters or their derivatives comprises reacting propyne with an acrylate using a ruthenium-containing transition metal catalyst, giving a high yield. Preparation of sorbic acid and its esters or their derivatives of formula H3CCH=CHCH=C(R2>)C(O)OR1> (I) comprises reacting propyne with a compound of formula H2C=C(R2>)C(O)OR1> (II) using a ruthenium-containing transition metal catalyst. R1>H, 1-6C alkyl or alkenyl (sic), 3-6C cycloalkyl or phenyl; and R2>H or 1-3C alkyl.

公开(公告)号：DE3684038D1

公开(公告)日：1992-04-09

申请号：DE3684038

申请日：1986-05-03

Applicant: BASF AG

Inventor： STECK WERNER ,  FESER RAINER ,  LOESER WERNER ,  RUDOLF PETER ,  VAETH GUENTER ,  JAKUSCH HELMUT ,  KOVACS JENOE

IPC: C01G49/00 ,  C01G49/06 ,  C09D5/23 ,  G11B5/706 ,  H01F1/11

Abstract: In the prodn. of acicular Co-contg. ferromagnetic Fe oxide, (a) gamma-FeOOH seeds are produced by the acid process in a first stage from Fe(II) salt solns. by addn. of alkali and simultaneous oxidn. by introduction of air in the presence of 0.2-1.0wt.% phosphate ions w.r.t. the amt. of gamma-FeOOH end prod.; (b) these seeds are then grown to the gamma-FeOOH end prod. in a second stage at a pH of 4-5.5; and then (c) after filtering, washing and drying, this is dehydrated at 300-600 deq.C and reduced to magnetite in the presence of organic cpds. decomposing in the presence of Fe oxide, then oxidised to gamma-Fe2O3 with gas contg. O2; then (d) modified by pptn. of Fe(OH)2 and/or Co(OH)2 in alkaline suspension, filtration, drying and tempering under inert gas at 100-350 deg.C.

公开(公告)号：FR2588687B3

公开(公告)日：1987-10-30

申请号：FR8613880

申请日：1986-10-06

Applicant: BASF AG

Inventor： GRUEHN DIETRICH ,  HACK JOACHIM ,  FEHRENBACH HUBERT ,  RUDOLF PETER ,  HOLL NORBERT

IPC: G11B23/033 ,  G11B23/03 ,  G11B3/58

公开(公告)号：GB2181881A

公开(公告)日：1987-04-29

申请号：GB8624629

申请日：1986-10-14

Applicant: BASF AG

Inventor： GRUEHN DIETRICH ,  HACK JOACHIM ,  FEHRENBACH HUBERT ,  RUDOLF PETER ,  HOLL NORBERT

IPC: G11B23/033 ,  G11B23/50 ,  G11B23/04

公开(公告)号：FR2588687A3

公开(公告)日：1987-04-17

申请号：FR8613880

申请日：1986-10-06

Applicant: BASF AG

Inventor： GRUEHN DIETRICH ,  HACK JOACHIM ,  FEHRENBACH HUBERT ,  RUDOLF PETER ,  HOLL NORBERT

IPC: G11B23/033 ,  G11B23/03 ,  G11B3/58