Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of BE332658ApublicationCriticalpatent/BE332658A/xx
C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
C01B33/00—Silicon; Compounds thereof
C01B33/113—Silicon oxides; Hydrates thereof
C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
C01B33/157—After-treatment of gels
C—CHEMISTRY; METALLURGY
C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
C09C1/28—Compounds of silicon
C09C1/30—Silicic acid
C09C1/3009—Physical treatment, e.g. grinding; treatment with ultrasonic vibrations