Diamond Shamrock Corporation

Edward J Peters

Wayne P Zeman

Andrew D Babinsky

Charles J Hora

J Edward Loeffler, Jr

In an electrolytic cell of the membrane type wherein the anolyte and catholyte are separated by a hydraulically impermeable membrane, the improvement comprising limiting the hydraulically impermeable membrane portion of the divider between anolyte and catholyte chambers to that area which is between the active areas of the anode and cathode while all other areas between catholyte and anolyte chambers are nonpermeable so as to minimize back-migration of undesirable ions which decrease overall current efficiency. Specifically, in a chlor-alkali cell an electrode would be enclosed in a fluorinated ethylene propylene enclosure having window-like openings therein made from Nafion type hydraulically impermeable cation exchange membrane, said window-like openings exposing only active electrode areas.

Membrane assembly for electrolytic cells

Disclosed is a bipolar electrode and method for electrically and mechanically connecting the backplates of a bipolar electrode to be used in a filter press electrolytic cell for electrochemical production. This method employs the use of explosion bonded solid metallic strips between the two backplates of a bipolar electrode to provide the esential electrical and mechanical connection therebetween while leaving sufficient air space to allow the escape of hydrogen gas thereby preventing hydrogen embrittlement of the titanium anode backplate.

Explosion bonding of bipolar electrode backplates

Disclosed is a method for electrically and mechanically connecting the backplates of a bipolar electrode to be used in a filter press electrolytic cell for electrochemical production. This method employs the use of explosion bonded solid metallic strips between the two backplates of a bipolar electrode to provide the essential electrical and mechanical connection therebetween while leaving sufficient air space to allow the escape of hydrogen gas thereby preventing hydrogen embrittlement of the titanium anode backplate.

An apparatus for interrupting the passage of electrical current along a mixed stream of gas and liquid.

Electrical current breaker for fluid stream

Electrolytic cell in which hollow cylindrical electrodes are arranged concentrically, anode within the cathode, and having a tubular ion permeable membrane supported on the outside of the anode separating the anolyte and the catholyte. The anolyte is contained within the membrane-anode structure, affording reduced construction cost and greater efficiency per unit of cell volume.

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Chardon, OH, United States of America

Edward J Peters