Patent ID: 11891307
Assignee: JGC CATALYSTS AND CHEMICALS LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B  H | IPC C  H

Claim 11:
12. A method of producing a silica-based particle group including irregularly shaped silica-based particles and non-irregularly shaped silica-based particles according to claim 11, the method comprising steps a to c:
(step a) a step which includes subjecting a porous silica-based gel to wet crushing in an alkaline state to obtain a solution containing irregularly shaped porous silica-based gel-including particles;
(step b) a step which includes adding a silicic acid solution to the solution containing the irregularly shaped porous silica-based gel-including particles in the alkaline state and heating the solution to cause the particles to grow with their shape remaining irregular while filling pores between primary particles in the irregularly shaped porous silica-based gel-including particles by a reaction with silicic acid contained in the silicic acid solution, thereby obtaining the irregularly shaped silica-based particles; and
(step c) a step which includes concentrating the silica-based particle group including the irregularly shaped silica-based particles having grown and collecting the concentrated silica-based particle group.