Electrochemical conversion of nitrogen containing gas to hydroxylamine and hydroxylammonium salts
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United States of America Patent
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Jan 20, 1998
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N/A
app pub date -
Oct 23, 1996
filing date -
Oct 23, 1996
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Expired
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Abstract
The present invention relates to a method of preparing hydroxylamine in an electrochemical cell, comprising the steps of: providing an electrochemical cell comprising an anode, a cathode, a bipolar membrane positioned between the anode and the cathode, the bipolar membrane having an anion selective side facing the anode and a cation selective side facing the cathode, and a divider positioned between the bipolar membrane and the anode, thereby defining a feed compartment on the cation selective side of the bipolar membrane, a recovery compartment on the anion selective side of the bipolar membrane, and an anolyte compartment between the divider and the anode; charging the feed compartment with an acidic electrolyte and the recovery and anolyte compartments with a solution; introducing nitrogen containing gas into the feed compartment; passing a current through the electrochemical cell thereby producing hydroxylammonium salt in the feed compartment; transferring at least a portion of the hydroxylammonium salt from the feed compartment to the recovery compartment thereby producing hydroxylamine in the recovery compartment; and recovering hydroxylamine from the recovery compartment.
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