Patent ID: 9249075
Filing Date: 2016-02-02
CPC Classification: C01B,C07C,Y02P

Claim Text:
1. A process for producing porous or finely divided solid inorganic materials, the surface of which has been modified with at least one organic substance, comprising a treatment with an organic liquid under supercritical conditions, wherein the process comprises: a) providing a hydrogel of the inorganic material; b) removing the water by treating the hydrogel with an anhydrous organic liquid, and c) drying the treated hydrogel under supercritical conditions in the presence of the organic liquid; or a′) providing a finely divided solid inorganic material having an unmodified surface and b′) treating the material provided in step a′) with the organic liquid under supercritical conditions; wherein the solid inorganic material is an aerogel; the organic liquid being a mixture of at least one reactive organic substance which can react with the atoms of the inorganic material to form a chemical bond and at least one inert organic substance and mixtures thereof, wherein the mixture has a critical point which is at lower temperature and/or lower pressure than the critical point of the reactive organic substance; wherein the inert organic substance is a C3-C8-alkane and the reactive organic substance is a C2-C4-alkanol.