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    1.
    发明专利
    未知

    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.

    5.
    发明专利
    未知

    公开(公告)号：DE3830019A1

    公开(公告)日：1990-03-15

    申请号：DE3830019

    申请日：1988-09-03

    Applicant: BASF AG

    Inventor： BOTT KASPAR DR ,  HOFFMANN HERWIG DR ,  SCHEIDMEIR WALTER DR

    IPC: B01J23/04 ,  B01J31/02 ,  C07B61/00 ,  C07C29/34 ,  C07C29/44 ,  C07C33/20 ,  C07C33/34

    Abstract: Process for the preparation of 3-aryl-isobutanols of the general formula I … … in which… R and R are hydrogen or an alkyl or cycloalkyl radical with up to 8 C atoms, preferably an alkyl radical with 1 to 4 C atoms,… which is characterised in that arylcarbinols of the general formula II … … are reacted with n-propanol in the presence of catalytic amounts of an alkali metal hydroxide or alkali metal oxide at 250 to 350 DEG C in a closed reaction vessel. … The process is particularly important for preparing 3-aryl-isobutanols of the formula I in which R is an alkyl radical with 1 to 4 C atoms and R is hydrogen. The p-methyl-, p-isopropyl- and p-tert.-butylphenylisobutanols obtained in this way in very high selectivity are valuable precursors for the fragrances jasmorange, cyclamenaldehyde and Lysmeral (Lilial ) which are in high demand.

    7.
    发明专利
    未知

    公开(公告)号：DE58904784D1

    公开(公告)日：1993-07-29

    申请号：DE58904784

    申请日：1989-08-29

    Applicant: BASF AG

    Inventor： BOTT KASPAR DR ,  HOFFMANN HERWIG DR ,  SCHEIDMEIR WALTER DR

    IPC: B01J23/04 ,  B01J31/02 ,  C07B61/00 ,  C07C29/34 ,  C07C29/44 ,  C07C33/20 ,  C07C33/34

    Abstract: Process for the preparation of 3-aryl-isobutanols of the general formula I … … in which… R and R are hydrogen or an alkyl or cycloalkyl radical with up to 8 C atoms, preferably an alkyl radical with 1 to 4 C atoms,… which is characterised in that arylcarbinols of the general formula II … … are reacted with n-propanol in the presence of catalytic amounts of an alkali metal hydroxide or alkali metal oxide at 250 to 350 DEG C in a closed reaction vessel. … The process is particularly important for preparing 3-aryl-isobutanols of the formula I in which R is an alkyl radical with 1 to 4 C atoms and R is hydrogen. The p-methyl-, p-isopropyl- and p-tert.-butylphenylisobutanols obtained in this way in very high selectivity are valuable precursors for the fragrances jasmorange, cyclamenaldehyde and Lysmeral (Lilial ) which are in high demand.

    9.
    发明专利
    未知

    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.

    10.
    发明专利
    未知

    公开(公告)号：ES2055768T3

    公开(公告)日：1994-09-01

    申请号：ES89115892

    申请日：1989-08-29

    Applicant: BASF AG

    Inventor： BOTT KASPAR DR ,  HOFFMANN HERWIG DR ,  SCHEIDMEIR WALTER DR

    IPC: B01J23/04 ,  B01J31/02 ,  C07B61/00 ,  C07C29/34 ,  C07C29/44 ,  C07C33/20 ,  C07C33/34

    Abstract: Process for the preparation of 3-aryl-isobutanols of the general formula I … … in which… R and R are hydrogen or an alkyl or cycloalkyl radical with up to 8 C atoms, preferably an alkyl radical with 1 to 4 C atoms,… which is characterised in that arylcarbinols of the general formula II … … are reacted with n-propanol in the presence of catalytic amounts of an alkali metal hydroxide or alkali metal oxide at 250 to 350 DEG C in a closed reaction vessel. … The process is particularly important for preparing 3-aryl-isobutanols of the formula I in which R is an alkyl radical with 1 to 4 C atoms and R is hydrogen. The p-methyl-, p-isopropyl- and p-tert.-butylphenylisobutanols obtained in this way in very high selectivity are valuable precursors for the fragrances jasmorange, cyclamenaldehyde and Lysmeral (Lilial ) which are in high demand.

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