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    Dispersión que contiene SiO2 con alta estabilidad en sales
    42.
    发明专利
    Dispersión que contiene SiO2 con alta estabilidad en sales 未知

    公开(公告)号：ES2897751T3

    公开(公告)日：2022-03-02

    申请号：ES16733472

    申请日：2016-06-28

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： LORTZ WOLFGANG ,  FISCHER ULRICH ,  PANZ CHRISTIAN ,  BERGMANN GABRIELE

    IPC: C01B33/14 ,  C01B33/141 ,  C01B33/149 ,  C01B33/159 ,  C09C1/30

    Abstract: Dispersión acuosa que contiene partículas de un ácido silícico pirógeno hidrófilo modificado en superficie, caracterizada por que A) las partículas de ácido silícico hidrófilo modificado en superficie comprenden un átomo de aluminio y un resto hidrocarburo, a) el átomo de aluminio está unido a un átomo de silicio de la superficie de partículas a través de un átomo de oxígeno, b) el resto hidrocarburo comprende un átomo de silicio que está unido a un átomo de carbono del resto hidrocarburo, c) poseen un diámetro medio de partícula dso en la dispersión de 40-200 nm y B) el valor de pH de la dispersión es 8 o más.

    PREPARATION FOR PRODUCING REFRACTORY MATERIALS
    47.
    发明专利
    PREPARATION FOR PRODUCING REFRACTORY MATERIALS 未知

    公开(公告)号：CA2667403C

    公开(公告)日：2013-08-06

    申请号：CA2667403

    申请日：2007-09-19

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： VON RYMON LIPINSKI TADEUSZ ,  TONTRUP CHRISTOPH ,  LORTZ WOLFGANG ,  BATZ-SOHN CHRISTOPH

    IPC: C04B35/04 ,  C04B35/10 ,  C04B35/443 ,  C04B35/66

    Abstract: Preparation for producing refractory materials, characterized in that it comprises one or more particulate, refractory components and one or more binders, where - the particulate, refractory component has a mean particle diameter of > 0.3 m and - the binder is selected from among - from 0.05 to 50% by weight of a very finely particulate binder having a mean particle diameter of from 10 nm to 0.3 m selected from the group consisting of aluminium oxide, titanium dioxide, zirconium dioxide and/or mixed oxides of the abovementioned oxides, - from 0 to 20% by weight of an inorganic binder, from 0 to 20% by weight of a hydraulically setting binder, - from 0 to 15% by weight of an organic, silicon-free binder - and the preparation additionally contains from 0 to 35% by weight of water, where - the proportion of the particulate, refractory component is equal to 100 and the percentages of the further materials in the preparation are based on the particulate component.

    48.
    发明专利
    未知

    公开(公告)号：AT533579T

    公开(公告)日：2011-12-15

    申请号：AT09005986

    申请日：2009-04-30

    Applicant: EVONIK DEGUSSA GMBH ,  CT FOR ABRASIVES & REFRACTORIES RES & DEV CARRD GMBH

    Inventor： TONTRUP CHRISTOPH ,  LORTZ WOLFGANG ,  PERLET GABRIELE ,  SCHMIDT-KLUGE ERICH ,  FRULLI DANILO

    IPC: B22C9/02 ,  B22C1/08 ,  B22C9/22 ,  B22C9/24 ,  B22C13/08

    Abstract: Slurry comprises: (a) from 50 to 80% by weight, of refractory particles having an average particle size of from 0.5 mu m to 150 mu m; (b) from 5 to 35% by weight, of aluminum oxide particles having an average particle diameter of less than 300 nm; and (c) from 5 to 35% by weight of water, with a pH of from 5 to 12. Independent claims are: (1) a method for producing the slurry, characterized in that an aqueous dispersion which contains (a) aluminum oxide particles having an average particle diameter of less than 300 nm as solid; and (b) has a content of aluminum oxide particles of more than 15% by weight; and has (c) a pH of from 5 to 12, is admixed with (b) refractory particles having an average particle size of from 0.5 mu m to 150 mu m; and (d) if appropriate, additives; (2) an aqueous dispersion of aluminum oxide particles, characterized in that: (a) the aluminum oxide particles have an average particle diameter of less than 300 nm; (b) the content of aluminum oxide particles is more than 15% by weight; (c) the dispersion additionally contains one or more additives selected from antifoams, wetting agents, polymers, polyphosphates, metal-organic compounds and antibacterial agents; and (d) the dispersion contains a buffer system and has a pH of from 5 to 12; (3) a process for producing a casting mold comprising: (a) dipping of a preshaped meltable model into the slurry; (b) coating of the surface of the model which is covered with the slurry by sanding with coarse, refractory particles having an average particle size of from not > 50 mu m to 1000 mu m; and (c) drying of the coated surface, where the steps (a) to (c) are repeated as often as desired until the number of coating layers required for the casting mold has been reached; and (4) a casting mold produced by a process.

    49.
    发明专利
    未知

    公开(公告)号：BRPI0710281A2

    公开(公告)日：2011-08-09

    申请号：BRPI0710281

    申请日：2007-03-12

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： LORTZ WOLFGANG ,  SCHUMACHER KAI

    IPC: C01B33/14 ,  B01J29/04 ,  C01B33/18 ,  C01B37/00 ,  C01B39/08 ,  C07D301/12

    Abstract: Dispersion containing pyrogenic silicon-titanium mixed oxide powders with a silicon dioxide content of 75 to 99.99 wt.-% and a titanium dioxide content of 0.01 to 25 wt. %, water and a basic, quaternary ammonium compound, wherein the mean aggregate diameter of the particles of the silicon-titanium mixed oxide powder in the dispersion is 200 nm at most. Process for the production of a titanium-containing zeolite with the use of the dispersion.

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