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    METHOD FOR PRODUCING ESTERS OF MULTIBASIC ACIDS
    24.
    发明专利
    METHOD FOR PRODUCING ESTERS OF MULTIBASIC ACIDS 未知

    公开(公告)号：CA2428575A1

    公开(公告)日：2002-05-16

    申请号：CA2428575

    申请日：2001-11-13

    Applicant: BASF AG

    Inventor： DISTELDORF WALTER ,  SCHWIRTEN KURT ,  MORSBACH BERND ,  GOLFIER GUNTHER

    IPC: C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/44 ,  C07C69/80 ,  C08G63/78

    Abstract: The invention relates to a method for producing esters of an acid component chosen from the multibasic C4-C10-carboxylic acids and an alcohol component chosen from C3-C12-alkanols or -alkanediols whose alkyl chain can be interrupted by 1 to 3 oxygen atoms. Sad method comprises the following steps: a) a mixture consisting essentially of the acid component or an anhydride thereof and the alcohol component is heated to boiling in a reaction zone in the presence of an esterification catalyst; b) the vapours containing alcohol and water are separated into a fragment that is rich in alcohol and a fragment that is rich in water by rectification; and c) the alcohol-rich fraction is fed back into the reaction zone, while the water-rich fraction is extracted from the process. The inventive method is simple to carry out and allows the rapid adjustment of an essentially quantitative conversion.

    25.
    发明专利
    未知

    公开(公告)号：ES2159896T3

    公开(公告)日：2001-10-16

    申请号：ES97954415

    申请日：1997-12-17

    Applicant: BASF AG ,  DAIMLER CHRYSLER AG

    Inventor： FETZER THOMAS ,  MORSBACH BERND ,  KUMBERGER OTTO ,  HARTWEG MARTIN ,  ROITZHEIM ROLF-DIRC ,  SEIBOLD ANDREA

    IPC: B01D53/94 ,  B01J23/00 ,  B01J23/89 ,  F01N3/10

    Abstract: PCT No. PCT/EP97/07091 Sec. 371 Date Jun. 16, 1999 Sec. 102(e) Date Jun. 16, 1999 PCT Filed Dec. 17, 1997 PCT Pub. No. WO98/26858 PCT Pub. Date Jun. 25, 1998A process for the catalytic reduction of NOx, the reduction taking place in the presence of a catalyst which comprises (a) from 20 to 97 wt % of A2O3, (b) from 1 to 40 wt % of CuO, (c) from 1 to 50 wt % of ZnO, (d) from 1 to 40 wt % of Ag, (e) from 0 to 2 wt % of Pt, (f) from 0 to 20 wt % of oxides of rare earth metals, elements of the 3rd subgroup of the Periodic Table of the Elements or mixtures thereof, based on the total weight of the components (a) to (e), which adds up to 100 wt %, wherein, in each case, up to half the weight of the component (a) may be replaced by Fe2O3, Cr2O3, Ga2O3 or mixtures thereof, of the component (b) by CoO, of the component (c) by MgO, of the component (d) by Au and of the component (e) by Pd, Ru, Os, Ir, Rh, Re or mixtures thereof, is used for reducing NOx, especially in combustion off-gases, the components (a), (b) and (c) forming a spinel which is doped with the components (d), (e) and (f).

    Accumulation catalyst
    29.
    发明专利
    Accumulation catalyst 未知

    公开(公告)号：CZ444599A3

    公开(公告)日：2000-06-14

    申请号：CZ444599

    申请日：1998-05-30

    Applicant: DAIMLER CHRYSLER AG ,  BASF AG

    Inventor： HARTWEG MARTIN ,  FERZER THOMAS ,  MORSBACH BERND ,  KUMBERGER OTTO

    IPC: B01D53/94 ,  B01J23/00 ,  B01J23/80 ,  B01J23/89 ,  F01N3/08

    Abstract: A storage catalyst includes (1) a component that has a catalytic reducing action for nitrogen oxides at least in the presence of hydrocarbons, and (2) a component that stores NOx at least at temperatures of below 100° C. The catalytically active component is of the general chemical formula AaBbO4, where A is one or more divalent metals and B is one or more trivalent metals, and where a+b 0. The reaction enthalpy or the chemical activity between the catalytically active component and the NOx-storing component is low at least up to temperatures of 600° C.

    NOx REDUCTION PROCESS OF WASTE GASES
    30.
    发明专利
    NOx REDUCTION PROCESS OF WASTE GASES 未知

    公开(公告)号：CZ168898A3

    公开(公告)日：1998-11-11

    申请号：CZ168898

    申请日：1996-12-11

    Applicant: BASF AG

    Inventor： FETZER THOMAS ,  MORSBACH BERND ,  HARTWEG MARTIN ,  ROITZHEIM RALF-DIRC ,  SEIBOLD ANDREA ,  WALZ LEONHARD

    IPC: B01D53/94 ,  B01J23/00 ,  B01J23/80 ,  B01D53/86

    Abstract: PCT No. PCT/EP96/05532 Sec. 371 Date Jun. 2, 1998 Sec. 102(e) Date Jun. 2, 1998 PCT Filed Dec. 11, 1996 PCT Pub. No. WO97/21482 PCT Pub. Date Jun. 19, 1997NOx, where x is 1 and 2, in exhaust gases is reduced over heterogeneous catalysts with hydrocarbons, carbon monoxide, hydrogen or mixtures thereof in the presence of oxygen from 100 to 650 DEG C. and an absolute pressure of from 0.5 to 50 bar by a process in which the heterogeneous catalysts used are bimodal or polymodal compounds of the general formula IA1-xM2O4(I),which, if required, are doped with rare earth metals, noble metal, titanium, vanadium, molybdenum, tungsten or mixtures thereof, and where A is magnesium, calcium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, tin or mixtures thereof, M is aluminum, gallium, indium, tin, chromium, manganese, iron, cobalt, nickel, copper, zinc or mixtures thereof and x is from 0 to 0.99, whose oxygen atoms are in a cubic close packed arrangement and A is present in the tetrahedral sites and M in the octahedral sites, it also being possible for A to occupy octahedral sites if an equivalent amount of M occupies tetrahedral sites.

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