Title:
PROCESS FOR PRODUCING LOW-ALKALI WATER GLASS, AND GRAUT FOR GROUND CONDITIONING
Document Type and Number:
Japanese Patent JP2003301175
Kind Code:
A
Abstract:
To surely obtain a low-alkali water glass solution at a low equipment cost and a low running cost.
In a tank 1 for adding an acid, an acid is added to a water glass diluted with water to granulate silica particles in a neutral or alkaline state while fluidity is maintained. The silica content of the water glass is raised while the alkali ions in the solution are removed by membrane separation 4, giving a concentrated solution N1. The concentrated solution N1, mixed with water, is subjected to diafiltration to reduce the acid ion concentration.
Inventors:
ONISHI TAKAAKI
MATSUMOTO KANJI
MATSUMOTO KANJI
Application Number:
JP2002109586A
Publication Date:
October 21, 2003
Filing Date:
April 11, 2002
Export Citation:
Assignee:
RAITO KOGYO KK
International Classes:
E02D3/12; C01B33/32; C09K17/12; C09K103/00; (IPC1-7): C09K17/12; C01B33/32; E02D3/12
Attorney, Agent or Firm:
Yoshihisa Nagai