公开(公告)号：DE1940412A1

公开(公告)日：1971-04-29

申请号：DE1940412

申请日：1969-08-08

Applicant: DEGUSSA

Inventor： JANZON KARL-HEINZ DIPL-CHEM DR ,  MEYER-SIMON EUGEN DIPL-CHEM DR ,  SCHWAB HEINRICH DIPL-CHEM DR

IPC: B01J21/00 ,  B01J21/20 ,  C01B33/149 ,  C04B12/04 ,  C04B28/24 ,  C01B33/12

Abstract: Silicic acid sols are treated with a mixture of trivalent metal salts and bivalent metal salts which react to form metallic oxide coatings on the surface of the sol particles. The sols as a result are rendered more stable, as indicated by the fact that the viscosity of said sols remains constant and the tendency to gel is eliminated. The sols can be dried to give a finely divided product.