Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1993-02-19
1994-05-10
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
2041825, 204151, 204301, B01D 6144
Patent
active
053104650
ABSTRACT:
Oxidation and reduction reactions are carried out in a continuous aqueous solution having an acidic part and an alkaline part formed by electrolysis and electrodialysis of an acidic electrolyte separated by a cation permeable membrane from an alkaline electrolyte containing a soluble anion of an acid whereby hydrogen ions are electrotransported from an acidic electrolyte through a cation permeable membrane into said alkaline electrolyte to form the acidic part. Reactions are carried out in the acidic or alkaline part or simultaneously or successively in the acidic and alkaline parts by adding reactants to said alkaline electrolyte and passing electricity through said electrolysis and electrodialytic process. Chromium.sup.+6 in the alkaline part is reduced to chromium.sup.+3 in the acidic part by addition of sulfur dioxide to the alkaline part and the chromium.sup.+3 is precipitated by hydroxyl ions in the alkaline part.
REFERENCES:
patent: 2921005 (1960-01-01), Bodamer
patent: 4260463 (1981-04-01), Rideout
patent: 4636288 (1987-01-01), Vaughan
Niebling John
Phasge Arun S,.
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