Chemistry of inorganic compounds – Miscellaneous process
Patent
1985-09-10
1987-05-05
Straub, Gary P.
Chemistry of inorganic compounds
Miscellaneous process
423488, 423531, 423DIG1, 423DIG2, 422204, 422212, 422213, 422216, 432 27, 432215, 156642, 159DIG29, 202121, 201 3, 201 34, C01B 718, C01B 1790, B01J 808, F27B 1500
Patent
active
046631453
ABSTRACT:
A device for and method of working up etching and pickling liquids consisting of a vertical furnace having one or more vertical reaction spaces through which balls move at a maximum packing density.
The furnace has a temperature gradient from the bottom (high) to the top (low). The reaction space and the balls consist of a material which is inert with respect to the liquid to be worked up. The liquid is introduced into the upper side of the furnace so that a film is formed in the heated surface of the balls. The salt dissolved in the liquid decomposes pyrolytically. The metal oxide is deposited on the surface of the balls and is removed therefrom after leaving the reaction space. The acid residue vapours are drained at the top and recovered in a separate absorber to the original pickling or etching acid.
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Dubois Franciscus J. M.
Knol Berend
Van Den Berk Peter J. T.
Spain Norman N.
Straub Gary P.
U.S. Philips Corporation
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