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公开(公告)号:DE2131114A1
公开(公告)日:1973-01-11
申请号:DE2131114
申请日:1971-06-23
Applicant: BASF AG
Inventor: JAHN JUERGEN DR , KRATZER OTTO DR
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公开(公告)号:DE19707943A1
公开(公告)日:1998-09-03
申请号:DE19707943
申请日:1997-02-27
Applicant: BASF AG
Inventor: HEFELE GERHARD , KRATZER OTTO DR , SCHEIDMEIR WALTER DR , ULRICH BERNHARD DR
IPC: B01J23/04 , B01J23/22 , B01J37/02 , C07C51/255 , C07C51/265 , C07C51/31 , C07D307/89 , B01J35/08
Abstract: The invention relates to a method for producing acid phthalic anhydride by catalytic gas phase oxidation of o-xylol or naphthalene or o-xylol/naphthalene mixtures with a molecular gas containing oxygen on a shell catalyst consisting of an inert, non-porous carrier material to which a coating of a catalytically active mass containing titanium dioxide and vanadium pentoxide is applied, wherein a catalyst is used whose catalytically active mass consists of 3 to 6 wt. % of vanadium pentoxide calculated as V2O5, 0.3 to 0.5 wt. % of a cesium compound calculated as Cs, and the remainder up to 100 wt. % of titanium dioxide anastase modification, in the presence or absence of a catalyst in the form of a shell differing from the above-mentioned catalyst which is used to produce gas-phase oxidation of o-xylol or naphthalene or o-xylol/naphthalene mixtures. In the presence of a second catalyst of this type, said catalyst is introduced to the reactor with the catalyst of the above-mentioned composition in a combined charge.
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公开(公告)号:DE3260978D1
公开(公告)日:1984-11-22
申请号:DE3260978
申请日:1982-02-09
Applicant: BASF AG
Inventor: BOTT KASPAR DR , KAIBEL GERD , HOFFMANN HERWIG DR , IRNICH RUDOLF DR , KRATZER OTTO DR
IPC: C07C231/02 , C07C20060101 , C07C67/00 , C07C231/00 , C07C233/03 , C07C103/127 , C07C102/06
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公开(公告)号:DE3161037D1
公开(公告)日:1983-11-03
申请号:DE3161037
申请日:1981-09-16
Applicant: BASF AG
Inventor: MUELLER FRANZ-JOSEF DR , STEINER WOLFGANG DR , ROSS KARL-HEINZ DR , KRATZER OTTO DR
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公开(公告)号:DE2230226A1
公开(公告)日:1974-01-10
申请号:DE2230226
申请日:1972-06-21
Applicant: BASF AG
Inventor: SUTER HUBERT DR , BERGER ROSEMARIE DIPL ING , BIPP HANSJOERG DR , BUERGER GERT DR , HAUPTMANN KURT , KRATZER OTTO DR , REIMER WILLI
IPC: C07C69/003 , C02F1/26 , C02F9/00 , C07C69/34
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公开(公告)号:DE19707943C2
公开(公告)日:1999-07-08
申请号:DE19707943
申请日:1997-02-27
Applicant: BASF AG
Inventor: HEFELE GERHARD , KRATZER OTTO DR , SCHEIDMEIR WALTER DR , ULRICH BERNHARD DR
IPC: B01J23/04 , B01J23/22 , B01J37/02 , C07C51/255 , C07C51/265 , C07C51/31 , C07D307/89 , B01J35/08
Abstract: In a process for preparing phthalic anhydride by catalytic gas-phase oxidation of o-xylene or naphthalene or o-xylene/naphthalene mixtures with a gas comprising molecular oxygen over a coated catalyst comprising an inert, nonporous support material on which a catalytically active composition comprising titanium dioxide and vanadium pentoxide is applied in layer form, a catalyst whose catalytically active composition comprises from 3 to 6% by weight of vanadium pentoxide, calculated as V2O5, from 0.3 to 0.5% by weight of a cesium compound, calculated as Cs, and the remainder to 100% by weight of titanium dioxide in the anatase modification is used in the presence or absence of a coated catalyst, differing therefrom, for the catalytic gas-phase oxidation of o-xylene or naphthalene or o-xylene/naphthalene mixtures and, in the presence of such a second catalyst, the latter is used in a combined bed with the catalyst of the above composition in the reactor.
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公开(公告)号:DE3664461D1
公开(公告)日:1989-08-24
申请号:DE3664461
申请日:1986-07-07
Applicant: BASF AG
Inventor: HOELDERICH WOLFGANG DR , MERGER FRANZ DR , KRATZER OTTO DR , SCHEIDMEIR WALTER DR
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公开(公告)号:DE2450067A1
公开(公告)日:1976-04-29
申请号:DE2450067
申请日:1974-10-22
Applicant: BASF AG
Inventor: BIPP HANSJOERG DR , KRATZER OTTO DR
IPC: C07C67/08
Abstract: Parent patent discloses a process for the continuous prepn. of dicarboxylic acid diesters from aliphatic and aromatic dicarboxylic acids or their anhydrides and 4-15C alcohols with recycling of alcohol used in excess at 150-250 degrees C. In present patent of addn., esterification takes place in presence of catalysts, e.g. acids, amphoteric high temp. catalysts or metal organic cpds. Used for prepn. of plasticisers. By-prod. contamination of waste water is reduced. Wash-water quantity is also reduced compared to standard processes.
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公开(公告)号:CH505874A
公开(公告)日:1971-04-15
申请号:CH1865868
申请日:1968-12-13
Applicant: BASF AG
Inventor: GRASER FRITZ DR , KRATZER OTTO DR
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公开(公告)号:DE1644484A1
公开(公告)日:1971-07-15
申请号:DE1644484
申请日:1967-12-14
Applicant: BASF AG
Inventor: GRASER FRITZ DR , KRATZER OTTO DR
IPC: C09B1/32
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