Silica with a high oil absorption capability and a controlled pr

Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing

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423335, C01B 3318, C01B 3312

Patent

active

047088591

ABSTRACT:
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 maintaining a constant-volume reaction medium to provide a suitable colloids of silica, reacting the colloids with an electrolyte and consolidating the resulting product by the addition of a solution of silicate and an acidifying agent to obtain a precipitation silica.

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patent: 4191742 (1980-03-01), Wason et al.
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