Title:
PRODUCTION OF CUBIC CALCIUM CARBONATE HAVING CONTROLLED PARTICLE DIAMETER
Document Type and Number:
Japanese Patent JP3913821
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain cubic calcium carbonate having satisfactory uniformity and dispersibility of the particles, also having high whiteness and thermal stability of the powder and capable of undergoing the control of particle diameter.
SOLUTION: When a carbonate soln. having 0.1-3.0mol/L concn. of carbonate ions is mixed with a calcium salt soln. having 0.1-3.0mol/L concn. of calcium ions to produce calcium carbonate, the solns. are mixed by dropping the carbonate soln. into the calcium salt soln. or the calcium salt soln. into the carbonate soln. in ≥30sec, carbonation is carried while keeping the inside of the mixing system at 3-30°C and the resultant aq. calcium carbonate suspension of ≤pH10 is washed. The objective cubic calcium carbonate having 0.05-5.0×m particle diameter is produced.
Inventors:
Hidemitsu Kasahara
Kiyoya Shimizu
Kenta Umeda
Kazunori Oide
Naofumi Saito
Genji Tsujiro
Kiyoya Shimizu
Kenta Umeda
Kazunori Oide
Naofumi Saito
Genji Tsujiro
Application Number:
JP30114396A
Publication Date:
May 09, 2007
Filing Date:
October 25, 1996
Export Citation:
Assignee:
Maruo Calcium Co., Ltd.
International Classes:
C01F11/18; C08K3/26; (IPC1-7): C01F11/18; //C08K3/26
Domestic Patent References:
| JP7196316A | ||||
| JP4031314A |
Attorney, Agent or Firm:
Kenji Itami