Patent · US Active

Process for preparing aqueous colloidal silica sols of high purity from alkali metal silicate solutions

US10065865B2 · kind B2 · utility

1Cited by

8References

8Claims

0Family size

Assignee

EVONIK DEGUSSA GMBH · DE

Inventors

Claudia Fuhrmann · Meckenheim, DE
Dieter Oehm · Bad Honnef, DE
Christian Panz · Wesseling, DE
Florian Paulat · Zeven, DE
Rudiger Schutte · Scheinfeld, DE
Hartwig Rauleder · Rheinfelden (Baden), DE
Georg Markowz · Alzenau, DE
Jurgen Lang · Ludwigsburg, DE
Bodo Frings · Aschendorf, DE

Key dates

Filing date	Feb 9, 2012
Grant date	Sep 4, 2018
Priority date	—
Expiry date	Sep 19, 2034

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K3/1463
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The present invention relates to a process for preparing aqueous colloidal silica sols of high purity from silicate solutions, to aqueous colloidal silica sols with a specific profile of impurities, and to the use thereof. The invention further encompasses high-purity aqueous silica obtained as an intermediate in the course of the purification process, high-purity silicon dioxide obtainable by dewatering, and the use thereof.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.