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Precipitation Of Scale-Forming Materials From Solution, William A. Hockings, Duane M. Thayer
Precipitation Of Scale-Forming Materials From Solution, William A. Hockings, Duane M. Thayer
Michigan Tech Patents
Scale-forming metal oxides and carbonates, such as cupric oxide, can be precipitated from an ammoniacal leaching solution with minimum scale buildup by distilling the solution in an externally heated distillation chamber mounted for rotation about a generally horizontal axis. The distillation chamber includes a plurality of axially spaced annular baffles defining a plurality of compartments containing a tumbling medium, such as spherical balls. The solution is continuously introduced into the inlet end of the chamber and heated under pressure to a temperature above its boiling point as it flows over the baffles toward the outlet end of the chamber. A …