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    11.
    发明专利
    未知

    公开(公告)号：DE19546484A1

    公开(公告)日：1997-07-10

    申请号：DE19546484

    申请日：1995-12-13

    Applicant: DAIMLER BENZ AG ,  BASF AG

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

    IPC: B01D39/14 ,  B01D53/86 ,  B01D53/94 ,  B01J23/00 ,  B01J23/76 ,  B01J35/04 ,  F01N3/08 ,  F01N3/10 ,  F01N3/20 ,  F01N13/02

    Abstract: The process for operating a purification apparatus for gases comprises passing the gas stream through a filter body containing a catalyst and catalytically converting the pollutants. At low temperature, especially below 200 degrees C, more especially below 150 degrees C, hydrocarbons are stored in the filter body (2) and released above these temperatures, and pollutants are catalytically converted with the aid of the carrier material of the filter body. Also claimed is the purification apparatus consisting of a filter body (2) made from a carrier material which stores at least 20 vol.%, preferably at least 50 vol.% of the hydrocarbons at below 200 degrees C, especially below 150 degrees C. The carrier material effectively reduces the pollutants with the aid of a reductant, preferably hydrocarbons and/or carbon monoxide.

    12.
    发明专利
    未知

    公开(公告)号：DE19546612A1

    公开(公告)日：1997-06-19

    申请号：DE19546612

    申请日：1995-12-13

    Applicant: BASF AG ,  DAIMLER BENZ AG

    Inventor： FETZER THOMAS ,  MORSBACH BERND

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

    Abstract: A process is disclosed for reducing Nox in which x equals 1 or 2, from exhaust fumes on heterogeneous catalysts with hydrocarbons, carbon monoxide, hydrogen or their mixtures, in the presence of oxygen, at a temperature from 100 to 650 DEG C and an absolute pressure of 0.5 to 50 bars. As heterogeneous catalysts, bimodal or higher-modal compounds are used which have the general formula (I) A1-x M2 O4 and are optionally doped with rare earths, precious metals, titanium, vanadium, molybdenum, tungsten or their mixtures. In the formula (I), A stands for magnesium, calcium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, tin or their mixtures; M stands for aluminium, gallium, indium, tin, chromium, manganese, iron, cobalt, nickel, copper, zinc or their mixtures; and x equals 0 to 0.99. The oxygen atoms of said compounds are arranged in the densest possible cubic sphere packing in which A is located in the tetrahedral gaps and M in the octahedral gaps, wherein A may also occupy octahedral gaps when an equivalent amount of M occupies tetrahedral gaps.

    14.
    发明专利
    未知

    公开(公告)号：DE59402378D1

    公开(公告)日：1997-05-15

    申请号：DE59402378

    申请日：1994-01-13

    Applicant: BASF AG

    Inventor： FETZER THOMAS ,  BUECHELE WOLFGANG ,  WISTUBA HERMANN ,  OTTO BERNHARD ,  BUERGER GERT ,  PIJL PAUL

    IPC: B01D53/56 ,  B01D53/86 ,  B01D53/94 ,  B01J21/04 ,  B01J23/00 ,  B01J23/72 ,  B01J23/76 ,  B01J23/78 ,  B01J23/80 ,  B01J35/10 ,  C07C51/487

    Abstract: PCT No. PCT/EP94/00081 Sec. 371 Date Mar. 24, 1995 Sec. 102(e) Date Mar. 24, 1995 PCT Filed Jan. 13, 1994 PCT Pub. No. WO94/16798 PCT Pub. Date Aug. 4, 1994A process for the catalytic decomposition of dinitrogen monoxide in a gas stream by contacting the gas stream at temperatures of 200 DEG -900 DEG C. and pressures of 0.1 to 20 bar with a catalyst free of noble metals, the catalyst being prepared by combining a spinel CuAl2O3 with another spinel-forming metal component selected from the group consisting of tin, lead, zinc, magnesium, calcium, strontium and barium or mixtures thereof in elemental form or as an oxide or salt, and calcining at temperatures of 300 DEG -1300 DEG C. and under pressures of 0.1-200 bar in order to at least partially liberate the copper from the spinel by replacement with the other metal component.

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