Chemistry: electrical and wave energy – Processes and products – Electrophoresis or electro-osmosis processes and electrolyte...
Patent
1997-03-11
1999-06-08
Gorgos, Kathryn
Chemistry: electrical and wave energy
Processes and products
Electrophoresis or electro-osmosis processes and electrolyte...
204522, 204530, 204537, 205703, B01D 6144, B01D 1706
Patent
active
059102373
ABSTRACT:
In one embodiment, the present invention relates to a process for recovering organic hydroxide from contaminated solutions containing the organic hydroxide and impurities including charging the contaminated solution to a first electrochemical cell containing at least two compartments, a cathode, an anode and a size selective divider and passing a current through the first electrochemical cell whereby impurities migrate through the size selective divider; recovering a second solution containing organic ions from the first electrochemical cell and charging the second solution to a second electrochemical cell containing at least two compartments, a cathode, an anode and a divider and passing a current through the second electrochemical cell whereby the organic hydroxide is purified; and recovering the organic hydroxide from the second electrochemical cell. In another embodiment, the present invention relates to a process for recovering onium hydroxide from contaminated solutions containing the onium hydroxide and impurities including forming a first solution containing an onium salt and impurities from the contaminated solution; contacting the first solution with a size selective membrane under pressure, wherein at least a portion of the impurities pass through the size selective membrane thereby providing a second solution containing an onium salt and a decreased amount of impurities; charging the second solution to an electrochemical cell containing at least two compartments, a cathode, an anode and a divider and passing a current through the cell whereby the onium hydroxide is purified; and recovering the onium hydroxide from the cell.
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International Search Report for PCT Patent Application Serial No. PCT/US98/02344 mailed Jun. 23, 1998.
Hellums Mark W.
Moulton Roger D.
Gorgos Kathryn
Parsons Thomas H.
Sachem, Inc.
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