| abstract |
The invention relates to a fine-particulate, stable, partially-aggregated silica gel with a BET surface area of 100 to 1200 m2/g, and a content of fro m 0.05 to 15 wt. % of guanidinium ions, a method for production thereof by reaction of a raw gel with guanidine carbonate, preferably in the presence o f a further base and use of the silica gel as an aid in paper retention.</SDOA B> |