OXIDE OR SILICATE PARTICLES OF WHICH THE HYDROXYL GROUPS SITUATED AT THE SURFACE ARE AT LEAST PARTLY REPLACED BY ORGANIC GROUPS, PROCESS FOR THEIR PREPARATION AND THEIR USE IN THE DESTABILIZATION OF EMULSIONS AND THE DESTRUCTION OF FOAMS

摘要

Silicic acid or silica particles having initially surface-located hydroxyl groups are modified by replacing at least partially the hydroxyl groups by an organic group to impart the particles with emulsion-breaking and foam-destroying properties. Processes for preparing the modified particles are also disclosed.