Method for recovering silica from silica-containing plant body using titanium oxide

A recovery method for silica, comprising bringing heated titanium oxide comprising titanium oxide granules into contact with a silica-containing plant body to obtain said silica, wherein the silica is 98% (wt) or more soluble silica and wherein the titanium oxide granules have the following characteristic (1) or (2):

• (1) a particle size distribution in the following range:
• titanium oxide granules each having a particle size of 1.2 mm or more account for from 1 wt % to 50 wt %;
• titanium oxide granules each having a particle size of from 0.5 mm to 1.2 mm account for from 40 wt % to 90 wt %;
• and
• titanium oxide granules each having a particle size of 0.5 mm or less account for from 1 wt % to 20 wt %;
• or
• (2) a particle size distribution in the following range:
• titanium oxide granules each having a particle size of 1.2 mm or more account for from 10 wt % to 60 wt %;
• and
• titanium oxide granules each having a particle size of from 0.5 mm to 1.2 mm account for from 40 wt % to 90 wt %.