Abstract Multi-polar electrolytic cells for manufacturing oxyhalogen compounds include terminal compartments containing monopolar electrodes, and a number of bipolar electrode compartments interposed between the terminal compartments, each compartment being substantially enclosed and non-communicating with the other compartments. Open-ended electrically insulating conduits extending from the walls of each compartment are adapted to provide a current leakage path and efficient circulation of electrolyte solution through each compartment when the cell is immersed in a reaction tank containing electrolyte solution. Dimensionally stable anodes and cathodes in each compartment are generally foraminous sheet interleaved in horizontal position but may also be interleaved solid sheet disposed vertically or intermediate horizontal and vertical positions. The cell structure provides an excellent path for circulation of the electrolyte during electrolysis and minimizes electric current leakage between adjacent compartments. A process for the preparation of sodium chlorate is described.
The cell according to claim 1 wherein the substantially vertically oriented conduits are carried by an upper portion and a lower portion of each of two opposed sidewalls of each compartment, respectively.
Claim 2
Dependent Claim
26 words
The cell according to claim 1 wherein the substantially vertically oriented conduits are carried by a top wall and a bottom wall of each compartment, respectively.
Claim 3
Dependent Claim
15 words
The cell of claim 1 wherein electrically insulated separators are positioned between adjacent electrode surfaces.
Claim 4
Dependent Claim
70 words
The cell of claim 1 wherein the means for supplying current to the anodes of the terminal compartment and withdrawing current from the cathodes of the cathode terminal compartment consists of at least one current conducting rod, said rod having one end connected to a source of electric current and the other end connected to at least one conductor bar in electrical cOntact with said anodes and said cathodes, respectively.
Claim 5
Dependent Claim
45 words
The cell of claim 1 wherein the dimensionally stable anodes consist essentially of a valve metal substrate bearing on at least part of its surface a coating of a solid solution of at least one precious metal oxide and at least one valve metal oxide.
Claim 6
Dependent Claim
31 words
The cell of claim 1 wherein the dimensionally stable anodes consist essentially of a titanium metal substrate having a surface coating of a solid solution of titanium dioxide and ruthenium dioxide.
Claim 7
Dependent Claim
25 words
The cell of claim 1 wherein the cathode is constructed of a metal selected from the group consisting of titanium, nickel, steel and stainless steel.
Claim 8
Dependent Claim
25 words
The cell of claim 1 wherein the conduits are of the same length as the thickness of the top and bottom wall of each compartment.