Patent ID: 11958981
Assignee: EVONIK OPERATIONS GMBH
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B  F  E | IPC B  C  E  F

Claim 14:
15. A process for producing a hydrophobized granular material of claim 1, comprising the following steps:
a) mixing a hydrophilic silica based mixed oxide with at least one IR opacifier;
b) densifying the mixture obtained in step a) to give a hydrophilic granular material;
c) either subjecting the hydrophilic granular material produced in step b) to thermal treatment at a temperature of 200 to 1200° C. or treating the hydrophilic granular material produced in step b) with ammonia;
d) hydrophobizing the hydrophilic granular material subjected to thermal treatment in step c) with a hydrophobizing agent.