Sachem, Inc.

David R Hulme

Hossein Sharifian

Roger D Moulton

Mark W Hellums

Wilfred Wayne Wilson

In one embodiment, the present invention relates to a process for recovering one of an onium hydroxide and onium salt from a solution containing an onium compound involving the steps of charging the solution containing the onium compound to an electrochemical cell comprising at least two compartments, a cathode, an anode, and a divider, wherein at least one compartment comprises an ion exchange material; passing a current through the electrochemical cell whereby the onium hydroxide or the onium salt is produced; and recovering the onium hydroxide or the onium salt from the electrochemical cell.

Process for recovering onium hydroxides or onium salts from solutions containing onium compounds using electrochemical ion exchange

In one embodiment, the present invention relates to a process for recovering an onium hydroxide from a solution containing an onium compound, including contacting the solution with a cation exchange material so that at least a portion of onium cations from the onium compound are adsorbed by the cation exchange material; contacting an acid with the cation exchange material to elute an onium salt; charging the onium salt to an electrochemical cell containing at least three compartments, a cathode, an anode, and in order from the anode to the cathode, a bipolar membrane and a cation selective membrane, and passing a current through the cell whereby the onium hydroxide is regenerated; and recovering the onium hydroxide from the cell. In another embodiment, the present invention relates to a process for recovering an onium hydroxide from a solution containing an onium compound, including contacting the solution with a cation exchange material so that at least a portion of onium cations from the onium compound are adsorbed by the cation exchange material; contacting an acid with the cation exchange material to elute an onium salt; charging the onium salt to an electrochemical cell containing at least two compartments, a cathode, an anode, and an anion selective membrane therebetween, and passing a current through the cell whereby the onium hydroxide is regenerated; and recovering the onium hydroxide from the cell.

Process for recovering onium hydroxides from solutions containing onium

The present invention provides a process for preparing onium hydroxide from a corresponding onium salt and for purifying onium hydroxide including providing an electrochemical cell containing a cathode, an anode, a divider and a bipolar membrane, the bipolar membrane having an anion selective side facing the anode and a cation selective side facing the cathode, wherein the divider is positioned between the cathode and the bipolar membrane, and the bipolar membrane is positioned between the divider and the anode, thereby defining a feed compartment between the divider and the bipolar membrane, a recovery compartment between the divider and the cathode, and a water compartment between the bipolar membrane and the anode; charging a solution containing at least one of the onium salt and the onium hydroxide to be purified to the feed compartment; charging a liquid electrolyte to the other compartments; passing a current through the electrochemical cell to produce the onium hydroxide in the recovery compartment; and recovering the onium hydroxide from the recovery compartment.

Synthesis of onium hydroxides from onium salts

A process is described for preparing organic and inorganic hydroxides or alkoxides, or ammonia or organic amines from the corresponding salts in an electrolysis cell which comprises an anolyte compartment containing an anode and an electrolyte solution, a catholyte compartment containing a cathode, and an intermediate compartment containing a liquid wherein said intermediate compartment is separated from the catholyte compartment by an anion selective membrane and from the anolyte compartment by a cation selective membrane, said process comprising the steps of:

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Austin, TX, United States of America

David R Hulme