The Standard Oil Company

Edward A Cuellar

Michael J Desmond

James C Davis

Michael F McGuiggan

John C Currie

Frederick W Haas

James L Calahan

Verna F Gaylor

The process of the present invention for the recovery of metal ions from a polymeric chelating agent stream or solution comprises the circulation of a loaded polymeric chelating agent stream or solution through an electrolytic recovery cell. The chelating agent is loaded with metal ions or complexes of the species to be recovered which have been extracted from a feed stream or solution. These metal ions or complexes will be reduced and recovered from the chelating polymer by an electrodeposition method. If the chelating agent is used in a continuous flow-type system, the lean polymeric chelating agent can optionally be recycled for further use in extraction of the desired metal species. The addition of scrub and regeneration stages to such a system is optional, depending on feed stream composition.

Electrodeposition recovery method for metals in polymer chelates

A process for the electrocatalytic reduction of carbon dioxide comprises immersing a transition metal complex with square planar geometry into an aqueous or nonaqueous solution which has been acidified to a hydrogen ion concentration of from about 10.sup.-5 M to about 10.sup.-1 M, adding the carbon dioxide, applying an electrical potential of from about -0.8 volts to about -1.5 volts vs. SCE, and reducing the carbon dioxide to carbon monoxide.

Acid promoted electrocatalytic reduction of carbon dioxide by square

Improved activated carbon electrodes are disclosed, which electrodes have increased charge storage capacity. Such improved electrodes are incorporated into energy storage devices such as electrical double layer capacitors. The improved charge storage capacity is due to the adsorption of polyoxometalate compounds into the activated carbon, which compounds are capable of reversible redox reactions and so provide a secondary charge storage mechanism without decreasing the charge storage ability of the activated carbon.

Polyoxometalate-modified carbon electrodes and uses therefor in

Improved activated carbon electrodes are disclosed which electrodes have increased charge storage capacity and reduced leakage current. Such improved electrodes are incorporated into energy storage devices such as electric double layer capacitors. The improved charge storage capacity is due to the adsorption of polyoxometalate compounds onto the activated carbon, and reduced leakage current is achieved by stabilizing the polyoxometalate compounds within the activated carbon through the use of a compound capable of generating at least one ionic site.

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Shaker Heights, OH, United States of America

Edward A Cuellar