| http://www.w3.org/ns/prov#value | - Any volatile co-products generated as a result of hydrolysis (such as, for example, alcohols where the hydrolyzable silicon compound is a tetraalkyl orthosilicates or where the hydrolyzable titanium compound is a titanium tetraalkoxide) may, if desired, be removed by any suitable means such as distillation or evaporation prior to hydrothermal treatment.
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