The Dow Chemical Company

Richard D Varjian

Susan J Babinec

Mani Shabrang

Stephen A Bedell

Larry H Kirby

Gale G Hoyer

Mou S Chao

Aubrey J Rhymes, Jr

Michael E Paulaitis

Susan S Tsai

An improved electrochromic device of the type having an electrochromic electrode in contact with an ion conductor, the ion conductor in turn being in contact with a layer of gold. The improvement of the instant invention is to interpose a layer of ruthenium oxide between the ion conductor and the layer of gold. The layer of ruthenium oxide is not an electrochromic material.

Ruthenium oxide counterelectrode for electrochromic devices

An improved electrochromic device of the type having an electrochromic electrode in contact with an ion conductor, the ion conductor in turn being in contact with a layer of gold. The improvement of the instant invention is to interpose a layer of iridium oxide between the ion conductor and the layer of gold wherein the layer of iridium oxide and the layer of gold do not form an electrochromic electrode.

Iridium oxide counterelectrode for electrochromic devices

The simultaneous abatement of NO and SO.sub.2 in flue gas is provided by an absorption process and apparatus utilizing an absorbent composition comprising an aqueous solution of chelates and sulfite salts. Metal chelates oxidized to an inactive state are electrochemically reduced. In the electrochemical cell, nickel or stainless steel anode materials are stable and may be used in the place of platinum coated anode materials when the anolyte pH is maintained greater than 12. At these conditions, the anode is corrosion resistant with a long operating time between replacement. Ultrafiltration or Donnan dialysis may be used to separate the chelate sorbents from the waste salts to reduce the loss of expensive chelate sorbents. Alternatively, an anionic exchange membrane can be used to electrodialytically separate waste sulfur/nitrogen salts from the absorbent solution.

Process for absorption of sulfur dioxide and nitric oxide from flue gas

The invention is a method for operating an electrochemical cell of the type having an anode and a cathode which are in contact with an aqueous electrolyte in the presence of at least one electroactive species, said method comprising: electrochemically converting at least a portion of at least one electroactive species to at least one electrochemical product while maintaining said aqueous electrolyte at supercritical fluid conditions.

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Midland, MI, United States of America

Richard D Varjian