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    11.
    发明专利
    未知

    公开(公告)号：DE3874691D1

    公开(公告)日：1992-10-22

    申请号：DE3874691

    申请日：1988-11-25

    Applicant: BASF AG

    Inventor： HOELDERICH WOLFGANG DR ,  GOETZ NORBERT DR

    IPC: C07D213/12 ,  C07D213/50 ,  C07D213/80

    Abstract: A process is claimed for the prepn. of substd. pyridines of formula (I) by reaction of acrolein (II) with either: (i) alkanals or their acetals of formula R2-CH2CHO (III), or (ii) ketones of formula (IV), in the presence of NH3: where R1 = 1-12C alkyl, cycloalkyl, aryl or aralkyl gp.; R2 = acyl or alkoxycarbonyl. The reaction is carried out pref. in the gas phase, at a temp. between 100 and 500 deg.C, also in the presence of zeolite catalysts of the following types: (i) pentasil, esp. B, Fe or Al silicate-zeolites, (ii) faujasite, esp. Al silicate zeolites, or (iii) zeolites doped with alkali metals, alkaline earths, transition metals or rare earths. Pref. (a) alkanals (or their derivs.), (III) are dimethoxybutan-3-one (CH3COCH2CH(OCH3)2). Pref. (b) ketones, (IV) are acetylacetone (CH3COCH2COCH3) or methyl acetoacetate (CH3COCH2COOCH3). Pref. (c) zeolites are zeolites of the mordenite gp. or narrow-pored zeolites of the erionite or chabasite types, or zeolites of the faujasite type, namely Y-, X-or L-zeolites. In the latter type, esp. useful as ultrastable faujasites i.e. dealuminised zeolites. Also esp. useful are pentasil zeolites which possess high SiO2/Al2O3 content and pore sizes intermediate between A- and X- or Y-zeolites. Pref. (d) solvent (where used) is THF, C6H5CH3 or petrol ether.

    13.
    发明专利
    未知

    公开(公告)号：DE3866535D1

    公开(公告)日：1992-01-09

    申请号：DE3866535

    申请日：1988-12-21

    Applicant: BASF AG

    Inventor： AGAR DAVID DR ,  RUPPEL WILHELM DR ,  HOELDERICH WOLFGANG DR ,  DREWS RONALD DR

    IPC: B01D53/86 ,  B01D53/36

    Abstract: Removal of NOx from waste gas (I) by selective redn. with NH3 is carried out in a reaction zone in the presence of catalysts, (I) being supplieo to the reaction zone continuously and the NH3 at intervals. The novel features are a) the direction of (I) is reversed periodically; b) NH3 is added at the start of each period in excess of the stoichoimetric amt. for redn. of NOx; c) the NH3 supply is cut off before unreacted NH3 leaves the reaction zone with (I); and d) the (I) flow is reversed as soon as the NOx and/or NH3 content of (I) leaving the reaction zone exceeds a predetermined value.

    14.
    发明专利
    未知

    公开(公告)号：DE3866440D1

    公开(公告)日：1992-01-09

    申请号：DE3866440

    申请日：1988-06-16

    Applicant: BASF AG

    Inventor： HOELDERICH WOLFGANG DR ,  HUPFER LEOPOLD DR ,  SCHNEIDER KURT DR

    IPC: C07C45/59 ,  C07C49/04 ,  C07C49/11 ,  C07C49/203 ,  C07C49/21

    Abstract: Prodn. of ketones of formula R1R2C=CR3-CO-Me (I) or R1R2CH-CHR3-CO-Me (II) from 4-substd. 5-methylene-1,3 -dioxolan-2-one of formula (III) is effected by contacting (III) with a catalyst comprising a zeolite, a zeolite-type phosphate and/or a B, Ce, Fe, Zr or Sr phosphate: R1-R3 = H or opt. substd. 1-12C alkyl, cycloalkyl, aryl, aralkyl or alkaryl, or R1+R3 or R2+R3 completes a cycloalkane ring. For prodn. of (II), the catalyst also contains a hydrogenation component and the reaction is effected in the presence of H2.

    18.
    发明专利
    未知

    公开(公告)号：DE3837308A1

    公开(公告)日：1990-05-10

    申请号：DE3837308

    申请日：1988-11-03

    Applicant: BASF AG

    Inventor： WANJEK HERBERT DR ,  WITTE CLAUS DR ,  SPRAGUE MICHAEL JOLYON DR ,  IRGANG MATTHIAS DR ,  HOELDERICH WOLFGANG DR ,  MROSS WOLF DIETER DR

    IPC: B01J23/72 ,  B01J23/80 ,  B01J35/10 ,  C01B3/16

    Abstract: Copper-containing catalysts for low-temperature conversion at temperatures of from 150 to 300 DEG C and at from 10 to 40 bar which additionally contain aluminium, and zinc, if desired in the form of the compounds or oxides, and are prepared by joint precipitation, the copper-containing catalysts containing potassium and having a BET surface area matched to the potassium content, the potassium content being set to from 0.1 to 3.0% by weight at a BET surface area of from 30 to 160 m /g, and their use for the production of hydrogen and carbon dioxide from carbon monoxide and water.

    Process for the preparation of ketones
    20.
    发明专利
    Process for the preparation of ketones 未知

    公开(公告)号：DE3825873A1

    公开(公告)日：1990-02-01

    申请号：DE3825873

    申请日：1988-07-29

    Applicant: BASF AG

    Inventor： SCHOMMER CHARLES DR ,  EBEL KLAUS DR ,  DOCKNER TONI DR ,  IRGANG MATTHIAS DR ,  HOELDERICH WOLFGANG DR

    IPC: B01J23/04 ,  C07C45/48 ,  C07D213/50

    Abstract: Process for the preparation of ketones of the general formula I in which R and R independently of one another denote alkyl, cycloalkyl, arylalkyl, aryl or hetaryl, where at least one of the radicals R or R have attached to the alpha carbon atom at least one hydrogen atom, by reacting two carboxylic acids of the general formulae (IIa/IIb), R -COOH (IIa) and R -COOH (IIb) in the gas phase in the presence of a catalyst, the catalysts having an active component of titanium dioxide whose specific surface area is greater than 10 m /g.

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