Precipitated silicas and process for producing same

Details Precipitated silicas and process for producing same Precipitated silicas and process for producing same

C - Chemistry, Metallurgy

01

B

23/192

C01B 33/12 (2006.01)

Patent

CA 1189681

Abstract of the Disclosure Precipitated silicas having the following physicochemi- cal characteristic data: Image according to Fig. 1 Image are produced by a process in which an original suspension of pre- cipitated silica produced according to German Auslegeschrift No. 1,467,019 is diluted and an alkali metal silicate solution, sul- phuric acid and water are simultaneously added, the pH value being kept constant between 7 and 9. The precipitated silicas are then filtered, washed, dried and micronized by means of a micronizer. Because of their abrasiveness the precipitated silicas can be used as polishing agents and abrasives and the micronized silicas may be used as polishing agents, abrasives and thickeners in toothpastes.

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