MANUFACTURE OF SILICA PARTICLES, SILICA PARTICLES HAVING NARROW PORE DIAMETER DISTRIBUTION, CATALYST MANUFACTURED THEREFROM AND USE THEREOF

摘要

Silica particles, especially spherical silica particles, having a very narrow pore diameter distribution which can be set independently from the pore volume can be prepared according to the sol-gel technique by partially pre-drying the hydrogel particles obtained and subjecting the partially pre-dried particles thus obtained to a hydrothermal treatment followed by washing, drying and optionally calcining. The novel silica particles thus obtained have an unusually regular structure and can be suitably used as catalysts or catalyst carriers, e.g. in hydrodemetallization processes and in olefin hydration processes.