| http://www.w3.org/ns/prov#value | - At a step (2), suspension 46 obtained by suspending an inorganic material such as silicon oxide, titanium oxide, alumina or zirconia in an aqueous solution of ammonia or sodium hydroxide by a so-called sol-gel method, which is heated to an appropriate temperature, is supplied from the inlet port into which the aqueous phase is previously supplied.
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