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    14.
    发明专利
    未知

    公开(公告)号：NO794080L

    公开(公告)日：1980-06-17

    申请号：NO794080

    申请日：1979-12-13

    Applicant: BASF AG

    Inventor： BOTT KASPAR ,  KAIBEL GERD ,  HOFFMANN HERWIG ,  KRATZER OTTO ,  IRNICH RUDOLF

    IPC: C07C51/00 ,  C07C53/02 ,  C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C67/00 ,  C07C

    Abstract: A process for the production of anhydrous or substantially anhydrous formic acid by hydrolysis of methyl formate which is carried out in a column having an upper fractionating section, a middle hydrolysis section and a lower extraction section and in which (a) the hydrolysis is carried out in the middle section of the columm, with water and methyl formate in countercurrent, (b) the resulting formic acid is extracted, in the lower section of the column, by means of a carboxylic acid amide which is fed into the lower end of the middle section of the column, (c) the extract phase, consisting in the main of formic acid and the carboxylic acid amide, is distillatively dehydrated, or substantially dehydrated, in the lower section of the column, (d) the methanol and uncovered methyl formate are removed by fractional distillation in the upper section of the column and (e) the pure formic acid or concentrated aqueous formic acid is distilled from the anhydrous or substantially anhydrous extract phase in a second column, leaving the carboxylic acid amide.

    METHOD FOR PRODUCING ACID PHTHALIC ANHYDRIDE AND AN APPROPRIATE SHELL CATALYST CONTAINING TITANIUM-VANADIUM-CESIUM.
    15.
    发明专利
    METHOD FOR PRODUCING ACID PHTHALIC ANHYDRIDE AND AN APPROPRIATE SHELL CATALYST CONTAINING TITANIUM-VANADIUM-CESIUM. 未知

    公开(公告)号：MY120022A

    公开(公告)日：2005-08-30

    申请号：MYPI9800882

    申请日：1998-02-27

    Applicant: BASF AG

    Inventor： ULRICH BERNHARD ,  HEFELE GERHARD ,  KRATZER OTTO ,  SCHEIDMEIR WALTER

    IPC: B01J23/04 ,  B01J23/22 ,  B01J37/02 ,  C07C51/255 ,  C07C51/265 ,  C07C51/31 ,  C07D307/89

    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 FROM, A CATALYST WHOSE CATALYTICALLY ACTIVE COMPOSITION COMPRISES FROM 3 TO 6% BY WEIGHT OF VANADIUM PENTOXIDE, CALCULATED AS V2O3, 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.

    16.
    发明专利
    未知

    公开(公告)号：ES2198051T3

    公开(公告)日：2004-01-16

    申请号：ES98912298

    申请日：1998-02-12

    Applicant: BASF AG

    Inventor： HEFELE GERHARD ,  KRATZER OTTO ,  SCHEIDMEIR WALTER ,  ULRICH BERNHARD

    IPC: B01J23/04 ,  B01J23/22 ,  B01J37/02 ,  C07C51/255 ,  C07C51/265 ,  C07C51/31 ,  C07D307/89

    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.

    17.
    发明专利
    未知

    公开(公告)号：DE59808067D1

    公开(公告)日：2003-05-28

    申请号：DE59808067

    申请日：1998-02-12

    Applicant: BASF AG

    Inventor： HEFELE GERHARD ,  KRATZER OTTO ,  SCHEIDMEIR WALTER ,  ULRICH BERNHARD

    IPC: B01J23/04 ,  B01J23/22 ,  B01J37/02 ,  C07C51/255 ,  C07C51/265 ,  C07C51/31 ,  C07D307/89

    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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