-
公开(公告)号：DE58909109D1
公开(公告)日：1995-04-20
申请号：DE58909109
申请日：1989-10-27
Applicant: BASF AG
Inventor： MUELLER MICHAEL WOLFGANG DR , SCHWAB EKKEHARD DR , AUWETER HELMUT DR , FESER RAINER DR , LEHNERT RUDI DR , MUELLER NORBERT DR , OHLINGER MANFRED DR
Abstract: The invention relates to a highly coercive, acicular ferromagnetic material essentially consisting of chromium dioxide with iron, and to a process for its preparation by thermal decomposition of hydrated chromium(III) chromate under elevated pressure.
-
公开(公告)号：DE59007628D1
公开(公告)日：1994-12-08
申请号：DE59007628
申请日：1990-12-10
Applicant: BASF AG
Inventor： MUELLER MICHAEL WOLFGANG DR , SCHWAB EKKEHARD DR , AUWETER HELMUT DR , FESER RAINER DR , BOETTCHER BERNHARD DR , MUELLER NORBERT DR , KOCHANEK WOLFGANG DR
IPC: C01G37/027 , C30B29/62 , G11B5/706
-
公开(公告)号：DE3941578A1
公开(公告)日：1991-06-20
申请号：DE3941578
申请日：1989-12-16
Applicant: BASF AG
Inventor： MUELLER MICHAEL WOLFGANG DR , SCHWAB EKKEHARD DR , AUWETER HELMUT DR , FESER RAINER DR , BOETTCHER BERNHARD DR , MUELLER NORBERT DR , KOCHANEK WOLFGANG DR
IPC: C01G37/027 , C30B29/62 , G11B5/706
-
公开(公告)号：DE3240337A1
公开(公告)日：1984-05-03
申请号：DE3240337
申请日：1982-10-30
Applicant: BASF AG
Inventor： STECK WERNER DR , KOVACS JENOE DR , MUELLER NORBERT DR , JAKUSCH HELMUT DR
IPC: C01G37/027 , G11B5/706 , H01F1/11 , B05D5/12 , G11B5/62
-
公开(公告)号：CH631980A5
公开(公告)日：1982-09-15
申请号：CH12478
申请日：1978-01-05
Applicant: BASF AG
Inventor： ROSSY PHILLIP A DR , HOFFMANN WERNER DR , MUELLER NORBERT DR
IPC: A61K31/38 , A61K31/381 , A61P25/04 , A61P29/00 , C07D333/38 , A23L1/236
-
Patent Agency Ranking
公开(公告)号：DE58907750D1
公开(公告)日：1994-07-07
申请号：DE58907750
申请日：1989-08-19
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：DE3718299A1
公开(公告)日：1988-12-15
申请号：DE3718299
申请日：1987-05-30
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 , C09C1/34
Abstract: This chromium dioxide is prepared by a finishing treatment of the surface of the chromium dioxide formed by a reductive treatment using adsorbed mono- or polybasic hydroxy carboxylic acids.
-
公开(公告)号：DE3610411A1
公开(公告)日：1987-10-01
申请号：DE3610411
申请日：1986-03-27
Applicant: BASF AG
Inventor： RUDOLF PETER DR , OHLINGER MANFRED DR , MUELLER NORBERT DR , HUEBNER WERNER
IPC: H01F1/11 , C01G37/027 , G11B5/706 , C01G37/033
-
公开(公告)号：DE2717477A1
公开(公告)日：1978-11-02
申请号：DE2717477
申请日：1977-04-20
Applicant: BASF AG
Inventor： ROSSY PHILLIP A DR , HOFFMANN WERNER DR , MUELLER NORBERT DR
IPC: C07D333/38 , C07D333/40
Abstract: Prepn. of thiophen carboxylic acids of formula (I) is effected by reaction of a 3-ketothiphan carboxylic acid (II) with a sulphonic acid: R4. SO2Y (III) to give a 3-sulphato deriv. then reacting the product with an alkali metal polysulphide. The resulting cpd. is treated with a sulphuric acid chloride or bromide or with Cl2 to give modified polysulphide which is finally treated with ahalogen and water. In the formula R is CO2R3 or H; R2 is H whe R' is -CO2R3; or R' is -CO2R3 when R' is H; R3 is H or an aliphatic group; X is halo; R4 is an aliphatic or aromatic group; Y is halo, the group OR3 or a group -O3S.R4. Provides simple, more economic process for prodn. of (I) which is intermediate for thiophen-saccharin sweetening agents. A typical cpd. methyl-3-chlorosulphonylthiophen-4-carboxylate, was prepd. by the 4-stage process from methyl 3-hydroxy-dihydrothiophen-4-carboxylate.
-
公开(公告)号：CH596125A5
公开(公告)日：1978-02-28
申请号：CH861875
申请日：1975-07-02
Applicant: BASF AG
Inventor： HOFFMANN WERNER DR , MUELLER NORBERT DR
IPC: C07C47/42
-
-
-
-
-
-
-
-
-
Search Results
23
records
(took 0.021 seconds)
