398.     ------. BUECHNER, -----.  [BRYANT, W. M. D.]  [Recovery of Thorium From the Thorium Catalyst Suspensions.]  FIAT Reel K-29, 1938, frames 6,995-7,004, 7,032-7,036, 7,091-7,094, 7,129-7,133; PB 70,218; TOM Reel 296.

      Describes improved sulfate process for the recovery of Th from the preliminary precipitation suspension.  Gives experiences in 2 large regeneration installations.