公开(公告)号：JPH06191829A

公开(公告)日：1994-07-12

申请号：JP35646791

申请日：1991-12-25

Applicant: AGENCY IND SCIENCE TECHN

Inventor： SHIBAZAKI YASUO ,  WATAMURA SHINJI ,  MIYAWAKI RITSURO ,  SAMEJIMA SOICHIRO ,  OSAKI YASUSHI ,  YOSHIDA SETSUO ,  SATOKAWA SHIGEO

IPC: C01B33/26 ,  C04B35/00 ,  C04B35/18 ,  C04B35/626 ,  D21H17/63

Abstract: PURPOSE:To produce spherical kaolinite having a high rate of formation, excellent in slurrying characteristics and compacting characteristics and incapable of production by the conventional method. CONSTITUTION:Spherical synthetic kaolinite having >=95% rate of formation is produced by hydrothermally treating uniformly mixed silica-alumina gel in two stages at 220 deg.C. The objective spherical synthetic kaolinite having a high rate of formation and applicable to ceramics, paper, pharmaceuticals, etc., can be produced.

公开(公告)号：JPH05170428A

公开(公告)日：1993-07-09

申请号：JP35646891

申请日：1991-12-25

Applicant: AGENCY IND SCIENCE TECHN ,  JINKOU NENDO GOSEI GIJUTSU KEN

Inventor： SHIBAZAKI YASUO ,  WATAMURA SHINJI ,  MIYAWAKI RITSURO ,  OSAKI YASUSHI ,  YOSHIDA SETSUO ,  SAMEJIMA SOICHIRO ,  SATOKAWA SHIGEO

IPC: C01B13/32 ,  C01B33/26 ,  C04B33/04

Abstract: PURPOSE:To provide a producing method for a high dispersible synthetic kaolinite excellent in molderability, slurry property and less in cohesion. CONSTITUTION:The high dispersible synthetic kaolinite having

公开(公告)号：JPH05170427A

公开(公告)日：1993-07-09

申请号：JP35646691

申请日：1991-12-25

Applicant: AGENCY IND SCIENCE TECHN ,  JINKOU NENDO GOSEI GIJUTSU KEN

Inventor： SHIBAZAKI YASUO ,  WATAMURA SHINJI ,  MIYAWAKI RITSURO ,  YOSHIDA SETSUO ,  OSAKI YASUSHI ,  SAMEJIMA SOICHIRO ,  SATOKAWA SHIGEO

IPC: C01B13/32 ,  C01B33/26 ,  C01B33/40 ,  C04B33/04

Abstract: PURPOSE:To obtain a kaolinite in high yield by gelating a silicate aq. solution and an aluminum compound aq. solution in a specific range of pH and by hydrotherm-treating after controlling a cation content and anion species content in the gel to a specific value. CONSTITUTION:The silicate aq. solution (e.g. No. 3 water glass) and the aluminum compound aq. solution (e.g. aluminum sulfate aq. solution) are mixed and are gelated while keeping pH4-12. The silica-alumina gel obtained is treated by the ion exchanging method, the neutralization hydrolysis method and washing or the like to control to

公开(公告)号：JPH05170426A

公开(公告)日：1993-07-09

申请号：JP35646591

申请日：1991-12-25

Applicant: AGENCY IND SCIENCE TECHN ,  JINKOU NENDO GOSEI GIJUTSU KEN

Inventor： SHIBAZAKI YASUO ,  WATAMURA SHINJI ,  MIYAWAKI RITSURO ,  OSAKI YASUSHI ,  YOSHIDA SETSUO ,  SAMEJIMA SOICHIRO ,  SATOKAWA SHIGEO

IPC: C01B33/26 ,  C01B33/40

Abstract: PURPOSE:To obtain a high purity synthetic kaolinite in high yield by gelating a Na2SiO3 aq. solution and an Al2(SO4)3 aq. solution with a pH controlled and hydrothermal treating after aging with aging with two steps of alkaline and acidic, filtrating and washing. CONSTITUTION:The sodium silicate aq. solution and the aluminum sulfate aq. solution are mixed and are gelated while keeping pH 4-12. The silica-alumina gel obtained is aged in the alkaline aq. solution of pH >=7, is filtrated and is washed to completely gelate an ungelated raw material and to completely remove residual SO4 ion. Next, the gel is aged in the acidic aq. solution of pH 3-4, is filtrated, is washed and sodium ion is ion exchanged with proton. And the synthetic kaolinite having