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US 3,941,667 AGranted
Method for the reprocessing of cell liquor from diaphragm cell electrolysis plants
AssigneeFriedrich Uhde GmbH
InventorsGeorg Von Semel, Eduard Schibilla, Wolfgang Strewe
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Abstract
A method for the reprocessing of cell liquor from diaphragm cell electrolysis plants that operate on potassium chloride brine. The cell liquor is contacted with an SO.sub.2 -bearing gas, and the effluent solution is oxidized with an oxygen-bearing gas, then a definite quantity of KCl is added to said oxidized solution, and this solution is subjected to a filtration and precipitation step, and finally it is then recycled as make-up brine to the electrolysis cell plant.
Claims3
Method for reprocessing cell liquor from a diaphragm cell electrolysis plant having potassium chloride brine cycle comprising
- 1. removing an effluent cell liquor solution from the diaphragm cell electrolysis plant,
- 2. contacting the solution with an SO.sub.2 -bearing gas,
- 3. oxidizing the solution with an oxygen-bearing gas,
- 4. adding a predetermined quantity of KCl to the oxidized solution,
- 5. subjecting the solution to a filtration and precipitation step, and
- 6. recycling the solution as a make-up brine to the diaphragm cell of the electrolysis plant.
3 more elements
Dependencies are inferred from the claim text.