# Is it absolutely necessary to use centrifuge to separate ethylene glycol from precipitate?

I've been trying to synthesize intermetallics of $\ce{XY}$ type using transition metal salts and main group element salts. For my system, EG, DEG, and TEG are good solvents. However, because of them being highly viscous, I've experienced normal drying doesn't do the trick and that the precipitate remains puffy even after drying (which shouldn't be the case) before sintering but by using centrifugation, I've been successful at removing the puffy texture of the precipitate.

Recently, I came upon this paper where they haven't used centrifugation for the main sample. Could anyone please explain how does this work?