专利名称：Processes for the preparation of silica
colloids and spherical silicas
发明人：Chevallier, Yvonick申请号：EP801378.6申请日：19850708公开号：EP0170578A1公开日：19860205
摘要：colloidal silica, spherical, diameter of particles between 10 and 100nm and silicabeads of average diameter ranging between 50 and 300 nm.these products can beobtained by reaction of an alkali silicate and an acidifying agent with simultaneousaddition of a constant volume of water tank, and continuous extraction reagentsin themiddle of the reaction.
申请人：RHONE-POULENC CHIMIE
地址：25, Quai Paul Doumer 92408 Courbevoie Cédex FR
国籍：FR
代理机构：Dubruc, Philippe
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