Chemistry of inorganic compounds – Extracting – leaching – or dissolving
Patent
1994-09-06
1996-12-17
Bos, Steven
Chemistry of inorganic compounds
Extracting, leaching, or dissolving
B01F 100
Patent
active
055850863
ABSTRACT:
The present invention is a method for enhancing reaction rates when digesting chemical systems which form passivating layers. Particles are introduced into a digestion fluid bath. Digestion is allowed to proceed until passivating layers of digestion products have partially formed on the particles. The layers constitute a diffusion barrier to the digestion fluid and reduce the digestion rate. The particles are periodically conveyed through an ultrasonic beam to remove portions of the passivating layers. Thus, fresh surfaces of the particles are exposed to the digestion fluid bath. The periodic conveyance is such that a desired rate of digestion is obtained.
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McCullough Edward D.
Waldron Robert D.
Bos Steven
Field Harry B.
Ginsberg Lawrence N.
Montanye George A.
Rockwell International Corporation
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