MACROPOROUS MICROSPHEROIDS AND A PROCESS FOR THEIR MANUFACTURE

摘要

1506114 Microspheroids E I DU POINT DE NEMOURS & CO 13 July 1976 [15 June 1976] 29114/76 Heading C1A Porous microspheroids of diameter 2-50 Ám, comprises a plurality of colloidal particles 0À1-1À0 Ám diameter cemented together at their points of contact by 1-10% by wt. of non-porous amorphous SiO 2 , the particles having a SiO 2 surface and a core of either SiO 2 , TiO 2 , ZrO 2 , Fe 2 O 3 , SnO 2 and antimony oxide or mixtures thereof and the microspheroids having a surface area of between 80 and 110% of the total surface area of the colloidal particles.