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    PRODUCTION OF ALKALI METAL CYANIDE-ALKALINE-EARTH METAL CYANIDE GRANULE AND ALKALI METAL CYANIDE GRANULE
    2.
    发明专利
    PRODUCTION OF ALKALI METAL CYANIDE-ALKALINE-EARTH METAL CYANIDE GRANULE AND ALKALI METAL CYANIDE GRANULE 失效

    公开(公告)号：JPH10310424A

    公开(公告)日：1998-11-24

    申请号：JP2078098

    申请日：1998-02-02

    Applicant: DEGUSSA

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

    IPC: C01C3/08 ,  C01C3/10

    Abstract: PROBLEM TO BE SOLVED: To obtain the granule of high-purity alkali (earth) metal cyanide by spraying an aq. soln. or suspension of an alkali (earth) metal hydroxide into a reactor, allowing the soln. or suspension to react with gaseous hydrogen cyanide and vaporizing the water introduced into the reactor and generated. SOLUTION: The reaction consists in the spray granulation in a fluidized bed kept at 100-250 deg.C. Hydrogen cyanide is introduced at 120-400 deg.C along with a fluidization gas (e.g. nitrogen). The molar ratio of the hydrogen cyanide to the alkali (earth) hydroxide equivalent is controlled to 1-5. For example, the BMA- or the reacting gas from the Shawingan's process contg. hydrogen contg. hydrogen cyanide and hydrogen as the main components is used or the reacting gas from the Andrussow's process contg. hydrogen cyanide, N2 , H2 , H2 O and CO as the main components is used. The concn. of the alkali metal metal soln. to be sprayed is controlled to 10-70 wt.%.

    4.
    发明专利
    未知

    公开(公告)号：BR9800554A

    公开(公告)日：1999-09-28

    申请号：BR9800554

    申请日：1998-02-04

    Applicant: DEGUSSA

    Inventor： SCHUETTE RUEDIGER ,  ALT HANS CHRISTIAN ,  BECKER-BALFANZ CATRIN ,  SAUER MANFRED ,  HIPPEL LUKAS VON ,  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.

    6.
    发明专利
    未知

    公开(公告)号：DE19704180C1

    公开(公告)日：1998-08-20

    申请号：DE19704180

    申请日：1997-02-05

    Applicant: DEGUSSA

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

    IPC: C01C3/08 ,  C01C3/10 ,  B01J2/16

    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.

    8.
    发明专利
    未知

    公开(公告)号：BR9804630A

    公开(公告)日：2000-04-11

    申请号：BR9804630

    申请日：1998-11-12

    Applicant: DEGUSSA

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

    IPC: B28B3/20 ,  B01J21/08 ,  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 ,  B01J23/44 ,  C07C69/155

    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.

    10.
    发明专利
    未知

    公开(公告)号：NO985276L

    公开(公告)日：1999-05-14

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

    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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