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    A HIGHLY STRUCTURED,FINELY DIVIDED PRECIPITATED SILICA,A PROCESS FOR ITS PRODUCTION AND ITS USE
    11.
    发明专利
    A HIGHLY STRUCTURED,FINELY DIVIDED PRECIPITATED SILICA,A PROCESS FOR ITS PRODUCTION AND ITS USE 未知

    公开(公告)号：ZA892021B

    公开(公告)日：1989-11-29

    申请号：ZA892021

    申请日：1989-03-16

    Applicant: DEGUSSA

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

    IPC: C01B33/193 ,  C09C1/30 ,  C09C3/10 ,  C01B33/187 ,  C09C3/12 ,  C09D7/00 ,  C09D7/12 ,  C01B ,  C09C ,  C09D

    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.

    A HIGHLY STRUCTURED,FINELY DIVIDED PRECIPITATED SILICA,A PROCESS FOR ITS PRODUCTION AND ITS USE
    12.
    发明专利
    A HIGHLY STRUCTURED,FINELY DIVIDED PRECIPITATED SILICA,A PROCESS FOR ITS PRODUCTION AND ITS USE 未知

    公开(公告)号：ZA8902021B

    公开(公告)日：1989-11-29

    申请号：ZA8902021

    申请日：1989-03-16

    Applicant: DEGUSSA

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

    IPC: C01B33/187 ,  C01B33/193 ,  C09C1/30 ,  C09D7/00 ,  C01B ,  C09C ,  C09D

    CPC classification number: C09C1/30 ,  C01B33/193 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/82 ,  C09C1/3027 ,  C09D7/42

    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.

    13.
    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.

    14.
    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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