How do i remove a solvent from a chemical that sublimes at room Temperature

I have a 500ml bottle of 20% Iodine Solution , How can i remove the solvent which is water , but Iodine sublimes at room temperature what can i do without loosing any of the iodine

Alternatively, use something that will remove the water. For instance, calcium oxide will react with water, hopefully not with iodine. Another possibility is to freeze the solution slowly: ice crystals will tend to reject iodine and so could be picked out. Eskimos remove water from alcoholic solutions this way, instead of fractional distillation that warmer-area people use. The ice will include some iodine. By melting the ice and re-freezing, the seond-order ice will have less iodine. This is zone refining as used to produce ultra-pure silicon, for example.

I am not familiar with this particular process. You could warm it to sublimate the Iodine, effectively distilling it, well below the boiling point of water. Or you could use another substance to effect it like
I2 + SO2 + 2 H2O → 2 HI + H2SO4 (120°C)

The HI is then separated by distillation. Note that concentrated H2SO4 may react with HI, giving I2, SO2 and H2O (backward reaction). Many chemical processes are reversible reactions, such as ammonia production from N2 and H2, but removing the desired product will shift equilibrium to the right. This reaction is sometimes referred to as Bunsen reaction. (From Wikipedia entry)

heat the chemical over a bunsen burner with the evaporating dish and watch glass