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    PRODUCTION OF KAOLINITE-LIKE MINERAL
    1.
    发明专利
    PRODUCTION OF KAOLINITE-LIKE MINERAL 失效

    公开(公告)号：JPH04114913A

    公开(公告)日：1992-04-15

    申请号：JP23023090

    申请日：1990-08-31

    Applicant: AGENCY IND SCIENCE TECHN ,  JINKOU NENDO GOUSEI GIJIYUTSU

    Inventor： SHIBAZAKI YASUO ,  MIYAWAKI RITSURO ,  MAEDA MASAKI ,  OSAKI YASUSHI ,  INAOKA WATARU ,  SAMEJIMA SOICHIRO ,  SATOKAWA SHIGEO

    IPC: C04B14/10 ,  C01B33/26

    Abstract: PURPOSE:To obtain a high-purity kaolinite-like mineral at low temperature in a short time in production by hydrothermal synthesis by blending an aqueous solution of sodium silicate with an aqueous solution of aluminum sulfate at a specific pH, subjecting the resulting substance to ion exchange for ammonium ion, burning to give a gel and using the gel as a raw material. CONSTITUTION:An aqueous solution of sodium silicate is uniformly blended with an aqueous solution of aluminum sulfate while maintaining at pH 4-12 to give a mixed gel of silica and alumina. Then, the gel, for example, is dispersed into five times as much solution of ammonium nitrate as sodium and Na in the subjected to ion exchange for ammonium ion. Then the gel is burnt at 600 deg.C for 1 hour to remove ammonium subjected to ion exchange. This prepared raw material gel is fed to an autoclave so as to give 5wt.% slurry concentration, subjected to hydrothermal treatment at 220 deg.C for 3 days, cooled, washed with water, filtered and dried to give a kaolinite-like mineral, a reaction product.

    PRODUCTION OF KAOLINITE-LIKE MINERAL
    2.
    发明专利
    PRODUCTION OF KAOLINITE-LIKE MINERAL 失效

    公开(公告)号：JPH04114912A

    公开(公告)日：1992-04-15

    申请号：JP23022990

    申请日：1990-08-31

    Applicant: AGENCY IND SCIENCE TECHN ,  JINKOU NENDO GOUSEI GIJIYUTSU

    Inventor： SHIBAZAKI YASUO ,  MIYAWAKI RITSURO ,  MAEDA MASAKI ,  SATOKAWA SHIGEO ,  INAOKA WATARU ,  OSAKI YASUSHI ,  SAMEJIMA SOICHIRO

    IPC: C04B14/10 ,  C01B33/26

    Abstract: PURPOSE:To obtain a high-purity kaolinite-like mineral at low temperature in a short time in production by hydrothermal synthesis by blending an aqueous solution of sodium silicate with an aqueous solution of aluminum sulfate at a specific pH and using the prepared gel as a raw material. CONSTITUTION:An aqueous solution of sodium silicate is uniformly blended with an aqueous solution of aluminum sulfate while maintaining at pH4-12 to give a mixed gel of silica and alumina. The gel is filtered and cleaned to remove by-products such as Na ion and sulfate ion. The gel is processed into 5% gel, fed to an autoclave, subjected to hydrothermal treatment at 220 deg.C for 5 days, cooled, washed with water, filtered and dried to give a kaolinite-like mineral, a reaction product.

    PRODUCTION OF HIGH-PURITY KAOLINITE-LIKE MINERAL
    8.
    发明专利
    PRODUCTION OF HIGH-PURITY KAOLINITE-LIKE MINERAL 失效

    公开(公告)号：JPH04114914A

    公开(公告)日：1992-04-15

    申请号：JP23023190

    申请日：1990-08-31

    Applicant: AGENCY IND SCIENCE TECHN ,  JINKOU NENDO GOUSEI GIJIYUTSU

    Inventor： SHIBAZAKI YASUO ,  MIYAWAKI RITSURO ,  MAEDA MASAKI ,  INAOKA WATARU ,  OSAKI YASUSHI ,  SAMEJIMA SOICHIRO ,  SATOKAWA SHIGEO

    IPC: C04B33/04 ,  C01B33/26

    Abstract: PURPOSE:To obtain a high-purity kaolinite-like mineral containing neither impurities nor unreacted substances in production by hydrothermal synthesis by blending an aqueous solution of sodium silicate with an aqueous solution of aluminum sulfate at a specific pH, subjecting Na ion to ion exchange for proton to give a gel and using the gel as a raw material. CONSTITUTION:An aqueous solution of sodium silicate is uniformly blended with an aqueous solution of aluminum sulfate while maintaining at pH 4-12 to give a mixed gel of silica and alumina. Then, Na in the gel is subjected to ion exchange for proton by using a cationic exchanging ion exchange resin containing a sulfonic group or carboxylic group as a functional group. Then, the prepared raw material gel is fed to an autoclave so as to give 5wt.% slurry concentration, subjected to hydrothermal treatment at 220 deg.C for 10 days, cooled, washed with water, filtered and dried to give a kaolinite-like mineral, a reaction product.

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