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    DEVICE AND PROCESS FOR REMOVING WASHCOAT REMAINING IN THE DUCTS OF NEWLY COATED MONOLITHIC AND HONEYCOMBED CATALYST SUPPORTS AND USE OF SAID DEVICE
    1.
    发明专利
    DEVICE AND PROCESS FOR REMOVING WASHCOAT REMAINING IN THE DUCTS OF NEWLY COATED MONOLITHIC AND HONEYCOMBED CATALYST SUPPORTS AND USE OF SAID DEVICE 未知

    公开(公告)号：CA1330871C

    公开(公告)日：1994-07-26

    申请号：CA590063

    申请日：1989-02-03

    Applicant: DEGUSSA

    Inventor： DITTRICH EWALD ,  MANNER REINHARD ,  BIRTIGH GERHARD ,  SCHMIDT FELIX

    IPC: B01D53/86 ,  B01J37/02 ,  B01J37/06

    Abstract: An apparatus and a method are disclosed for the removal and the recovery of washcoat remaining in the channels of freshly coated monolithic or honeycombed catalytic carriers. The carrier is inserted into a chamber from above and tightly fitted therein at least with the lowest part of the carrier therein. The chamber is fitted with a collection area and a runoff located thereunder. The runoff leads via a shutoff valve into a separation vessel under a vacuum. The opening and closing of the shutoff valve causes air to be aspirated through the carrier channels, which are open at the top or are gradually opened by means of a slotted slide. This action causes the washcoat remnants to he transferred into the separation vessel, where they can be collected in the sump and are then pumped off. The apparatus can be used in systems for manufacturing catalysts for cleaning exhaust gases.

    8.
    发明专利
    未知

    公开(公告)号：BR9100820A

    公开(公告)日：1991-11-05

    申请号：BR9100820

    申请日：1991-02-28

    Applicant: DEGUSSA

    Inventor： SCHMIDT FELIX ,  MERGNER BERND ,  DOMESLE RAINER

    IPC: B01J23/63 ,  B01J23/56 ,  B01J33/00 ,  B01J37/00 ,  B01J37/02

    Abstract: The thermal shock resistance of monolithic catalysts is improved by pre-coating a ceramic monolithic carrier, before the application of catalytic components, with an organic filling material which can be melted and burned out and which comprises a dispersion of very fine solid particles, by heating the carrier above the melting point of the filling material, then applying the catalytic components and then burning out the filling material.

    9.
    发明专利
    未知

    公开(公告)号：DK160289A

    公开(公告)日：1989-11-08

    申请号：DK160289

    申请日：1989-04-03

    Applicant: DEGUSSA

    Inventor： KERNER DIETER ,  WAGNER ADOLF ,  SCHMIDT FELIX ,  BAUER DIETRICH

    IPC: C01B33/187 ,  C01B33/193 ,  C09C1/30 ,  C09C3/10 ,  C09C3/12 ,  C09D7/00 ,  C09D7/12

    Abstract: The finely divided high-structure precipitated silica, which has a BET surface area (DIN 60132) of between 150 and 350 m /g a compacted bulk density (DIN 53194) of between 60 and 120 g/l a DBP number of between 3.0 and 4.0 ml/g a particle size distribution of at least 70 % of 1 to 6 mu m. It can be prepared by heating a mixture of water and sodium silicate to a temperature of 70 to 80 DEG C with stirring, metering into this mixture concentrated sulphuric acid until half of the alkali present is neutralised, treating the reaction mixture by means of a shearing unit and, if desired, simultaneously increasing the temperature to 86 +/- 5 DEG C, adding concentrated sulphuric acid after a period of 30 to 120 minutes at a higher speed until the pH of the silica suspension formed is 3.0 to 3.5, diluting, if desired, the silica suspension with water, separating off, if desired, the coarse portion by means of a centrifugal pump and a hydrocyclone, filtering off the silica using a known filtering device, washing the silica filter cake free of sulphate, redispersing the silica filter cake with the addition of water and using a stirrer to give a suspension having a solids content of 80 +/- 10 g/l, adding to this suspension, if desired, alkyldimethylbenzylammonium chloride, spray drying the suspension thus obtained and, if desired, milling the dried product. The precipitated silica can be used as matting agents in paints either in uncoated or coated form.

    10.
    发明专利
    未知

    公开(公告)号：DK160289D0

    公开(公告)日：1989-04-03

    申请号：DK160289

    申请日：1989-04-03

    Applicant: DEGUSSA

    Inventor： KERNER DIETER ,  WAGNER ADOLF ,  SCHMIDT FELIX ,  BAUER DIETRICH

    IPC: C01B33/187 ,  C01B33/193 ,  C09C1/30 ,  C09C3/10 ,  C09C3/12 ,  C09D7/00 ,  C09D7/12

    Abstract: The finely divided high-structure precipitated silica, which has a BET surface area (DIN 60132) of between 150 and 350 m /g a compacted bulk density (DIN 53194) of between 60 and 120 g/l a DBP number of between 3.0 and 4.0 ml/g a particle size distribution of at least 70 % of 1 to 6 mu m. It can be prepared by heating a mixture of water and sodium silicate to a temperature of 70 to 80 DEG C with stirring, metering into this mixture concentrated sulphuric acid until half of the alkali present is neutralised, treating the reaction mixture by means of a shearing unit and, if desired, simultaneously increasing the temperature to 86 +/- 5 DEG C, adding concentrated sulphuric acid after a period of 30 to 120 minutes at a higher speed until the pH of the silica suspension formed is 3.0 to 3.5, diluting, if desired, the silica suspension with water, separating off, if desired, the coarse portion by means of a centrifugal pump and a hydrocyclone, filtering off the silica using a known filtering device, washing the silica filter cake free of sulphate, redispersing the silica filter cake with the addition of water and using a stirrer to give a suspension having a solids content of 80 +/- 10 g/l, adding to this suspension, if desired, alkyldimethylbenzylammonium chloride, spray drying the suspension thus obtained and, if desired, milling the dried product. The precipitated silica can be used as matting agents in paints either in uncoated or coated form.

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