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    PROCESS FOR PRODUCING GRANULATES OF ALKALI METAL CYANIDE AND ALKALINE EARTH CYANIDE, AND CYANIDE GRANULATES WITH HIGH PURITY OBTAINED IN SUCH A MANNER
    12.
    发明专利
    PROCESS FOR PRODUCING GRANULATES OF ALKALI METAL CYANIDE AND ALKALINE EARTH CYANIDE, AND CYANIDE GRANULATES WITH HIGH PURITY OBTAINED IN SUCH A MANNER 未知

    公开(公告)号：CZ28998A3

    公开(公告)日：1998-08-12

    申请号：CZ28998

    申请日：1998-01-30

    Applicant: DEGUSSA

    Inventor： SCHUTTE RUDIGER DR ,  ALT HANS CHRISTIAN ,  BECKER-BALFANZ CATRIN ,  SAUER MANFRED DR ,  VON HIPPEL LUKAS DR ,  FEUER OLIVER ,  LOROSCH JURGEN DR

    IPC: C01C3/08 ,  C01C3/10 ,  B01J2/04

    Abstract: Preparation of alkali or alkaline earth metal cyanide granules involves spraying an aqueous alkali metal hydroxide solution or an aqueous alkaline earth metal hydroxide suspension onto a fluidised product seed bed at 100-250 degrees C in a fluidised bed spray granulation reactor which is supplied with a hydrogen cyanide-containing gas in amount ≥ 1 mol HCN per metal equivalent, the introduced and formed water being evaporated by the fluidising gas supplied at 110-500 degrees C. Also claimed are sodium or potassium cyanide granules having a spherical particle shape with a smooth or raspberry-like surface structure, 0.1-20 mm particle diameter for 99 wt.% of the granules, ≥ 600 g/dm bulk density, less than 1 wt.% wear measured by the roller wear test (Erwaka TAR wear tester, 20 g sample, 60 minutes, 20 rpm.) and a clumping index of NOTGREATER 4 (measured by 14 day 10g load application onto a 100 g sample in a 5.5 cm inside diameter cylinder), the novelty being that the alkali metal carbonate content is less than 0.5 wt.% and the alkali metal formate content is less than 0.3 wt.%, the alkali metal in these by-products being the same as that in the cyanide. Preferably, the total alkali metal carbonate and alkali metal formate content is less than 0.4 wt.% and the granules are prepared by the above process using reaction gas from a BMA process and superheated steam as fluidising gas.

    Process for preparing alkali metal cyanide and alkaline earth metal cyanide granules
    13.
    发明专利
    Process for preparing alkali metal cyanide and alkaline earth metal cyanide granules 未知

    公开(公告)号：AU721518B2

    公开(公告)日：2000-07-06

    申请号：AU5293098

    申请日：1998-02-04

    Applicant: DEGUSSA

    Inventor： SCHUTTE RUDIGER ,  ALT HANS CHRISTIAN ,  BECKER-BALFRANZ CATRIN ,  SAUER MANFRED ,  HIPPEL LUKAS VON ,  FEUER OLIVER ,  LOROSCH JURGEN

    IPC: C01C3/08 ,  C01C3/10

    Abstract: Preparation of alkali or alkaline earth metal cyanide granules involves spraying an aqueous alkali metal hydroxide solution or an aqueous alkaline earth metal hydroxide suspension onto a fluidised product seed bed at 100-250 degrees C in a fluidised bed spray granulation reactor which is supplied with a hydrogen cyanide-containing gas in amount ≥ 1 mol HCN per metal equivalent, the introduced and formed water being evaporated by the fluidising gas supplied at 110-500 degrees C. Also claimed are sodium or potassium cyanide granules having a spherical particle shape with a smooth or raspberry-like surface structure, 0.1-20 mm particle diameter for 99 wt.% of the granules, ≥ 600 g/dm bulk density, less than 1 wt.% wear measured by the roller wear test (Erwaka TAR wear tester, 20 g sample, 60 minutes, 20 rpm.) and a clumping index of NOTGREATER 4 (measured by 14 day 10g load application onto a 100 g sample in a 5.5 cm inside diameter cylinder), the novelty being that the alkali metal carbonate content is less than 0.5 wt.% and the alkali metal formate content is less than 0.3 wt.%, the alkali metal in these by-products being the same as that in the cyanide. Preferably, the total alkali metal carbonate and alkali metal formate content is less than 0.4 wt.% and the granules are prepared by the above process using reaction gas from a BMA process and superheated steam as fluidising gas.

    14.
    发明专利
    未知

    公开(公告)号：NO985276D0

    公开(公告)日：1998-11-12

    申请号：NO985276

    申请日：1998-11-12

    Applicant: DEGUSSA

    Inventor： KRAUSE HELMFRIED ,  ROTGERINK HERMANUS LANSINK ,  FEUER OLIVER ,  TACKE THOMAS ,  PANSTER PETER

    IPC: B01J21/08 ,  B28B3/20 ,  B01J23/54 ,  B01J32/00 ,  B01J35/10 ,  B01J37/00 ,  B28B11/16 ,  C01B33/12 ,  C01B33/18 ,  C04B35/14 ,  C07B61/00 ,  C07C29/04 ,  C07C31/08 ,  C07C67/055 ,  C07C69/15 ,  C01B

    Abstract: A pressed article (I) is based upon pyrogenically produced silicon dioxide having a pore volume of 0.5-1.8 ml/g. Independent claims are included for: (i) the production of (I) by mixing pyrogenically produced silicon dioxide with methylhydroxyethylcellulose, wax and polyethylene glycol and water followed by extrusion, optionally cutting the extrudate to a desired length, drying at 70-150 degrees C and heating at 400-1200 degrees C for up to 10 hours; (ii) a supported catalyst (II) comprising (I) for the production of vinylacetate monomer, that contains palladium (Pd) and/or Pd compounds and alkali compounds; gold (Au) and/or Au compound (Pd/alkali/Au system) or cadmium (Cd) and/or Cd compounds (Pd/alkali/Cd system) or barium (Ba) and/or Ba compounds (Pd/alkali/Ba system) or Pd, alkali compounds and mixture of Au and/or Cd and/or Ba; and (iii) the production of the catalyst support (II) by soaking, spraying, condensing, dipping or precipitating the Pd, Au, Cd and/or Ba compounds onto (I), optionally reducing the metal, washing to remove the resulting chloride content, impregnating with alkali acetate or alkali compound that is converted under reaction conditions at least partially to alkali acetate.

    PROCESS FOR THE PREPARATION OF ALKALI OR ALKALINE-EARTH METAL CYANIDE GRANULATES AND THE OBTAINED HIGH PURITY ALKALI METAL CYANIDE GRANULATES
    15.
    发明专利
    PROCESS FOR THE PREPARATION OF ALKALI OR ALKALINE-EARTH METAL CYANIDE GRANULATES AND THE OBTAINED HIGH PURITY ALKALI METAL CYANIDE GRANULATES 未知

    公开(公告)号：SK14398A3

    公开(公告)日：1998-08-05

    申请号：SK14398

    申请日：1998-02-02

    Applicant: DEGUSSA

    Inventor： SCHUETTE RUEDIGER ,  ALT HANS-CHRISTIAN ,  BECKER-BALFANZ CATRIN ,  SAUER MANFRED ,  VON HIPPEL LUKAS ,  FEUER OLIVER ,  LOROESCH JUERGEN

    IPC: C01C3/08 ,  C01C3/10

    Abstract: Preparation of alkali or alkaline earth metal cyanide granules involves spraying an aqueous alkali metal hydroxide solution or an aqueous alkaline earth metal hydroxide suspension onto a fluidised product seed bed at 100-250 degrees C in a fluidised bed spray granulation reactor which is supplied with a hydrogen cyanide-containing gas in amount ≥ 1 mol HCN per metal equivalent, the introduced and formed water being evaporated by the fluidising gas supplied at 110-500 degrees C. Also claimed are sodium or potassium cyanide granules having a spherical particle shape with a smooth or raspberry-like surface structure, 0.1-20 mm particle diameter for 99 wt.% of the granules, ≥ 600 g/dm bulk density, less than 1 wt.% wear measured by the roller wear test (Erwaka TAR wear tester, 20 g sample, 60 minutes, 20 rpm.) and a clumping index of NOTGREATER 4 (measured by 14 day 10g load application onto a 100 g sample in a 5.5 cm inside diameter cylinder), the novelty being that the alkali metal carbonate content is less than 0.5 wt.% and the alkali metal formate content is less than 0.3 wt.%, the alkali metal in these by-products being the same as that in the cyanide. Preferably, the total alkali metal carbonate and alkali metal formate content is less than 0.4 wt.% and the granules are prepared by the above process using reaction gas from a BMA process and superheated steam as fluidising gas.

    Mouldings based on pyrogenic silicon dioxide
    17.
    发明专利
    Mouldings based on pyrogenic silicon dioxide 未知

    公开(公告)号：SG74670A1

    公开(公告)日：2000-10-24

    申请号：SG1998004630

    申请日：1998-11-11

    Applicant: DEGUSSA

    Inventor： KRAUSE HELMFRIED ,  ROTGERINK HERMANUS LANSINK ,  FEUER OLIVER ,  TACKE THOMAS ,  PANSTER PETER

    IPC: B01J21/08 ,  B01J23/54 ,  B01J32/00 ,  B01J35/10 ,  B01J37/00 ,  B28B3/20 ,  B28B11/16 ,  C01B33/12 ,  C01B33/18 ,  C04B35/14 ,  C07B61/00 ,  C07C29/04 ,  C07C31/08 ,  C07C67/055 ,  C07C69/15 ,  C09C1/30

    Abstract: A pressed article (I) is based upon pyrogenically produced silicon dioxide having a pore volume of 0.5-1.8 ml/g. Independent claims are included for: (i) the production of (I) by mixing pyrogenically produced silicon dioxide with methylhydroxyethylcellulose, wax and polyethylene glycol and water followed by extrusion, optionally cutting the extrudate to a desired length, drying at 70-150 degrees C and heating at 400-1200 degrees C for up to 10 hours; (ii) a supported catalyst (II) comprising (I) for the production of vinylacetate monomer, that contains palladium (Pd) and/or Pd compounds and alkali compounds; gold (Au) and/or Au compound (Pd/alkali/Au system) or cadmium (Cd) and/or Cd compounds (Pd/alkali/Cd system) or barium (Ba) and/or Ba compounds (Pd/alkali/Ba system) or Pd, alkali compounds and mixture of Au and/or Cd and/or Ba; and (iii) the production of the catalyst support (II) by soaking, spraying, condensing, dipping or precipitating the Pd, Au, Cd and/or Ba compounds onto (I), optionally reducing the metal, washing to remove the resulting chloride content, impregnating with alkali acetate or alkali compound that is converted under reaction conditions at least partially to alkali acetate.

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