Precipitation silicas, in the form of aggregates as shown in FIG. 1, having a mean projected area of the aggregates which is higher than about 8,000 nm.sup.2 and preferably is higher than about 15,000 nm.sup.2. The present invention also concerns a process for the production of precipitation silica by...http://www.google.com.au/patents/US4708859?utm_source=gb-gplus-sharePatent US4708859 - Silica with a high oil absorption capability and a controlled primary structure and process for the production thereof
