Chemistry: electrical and wave energy – Processes and products
Patent
1984-02-23
1985-04-02
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
204228, 137 5, 73 611C, C25B 126
Patent
active
045086028
ABSTRACT:
A process for producing a concentrated aqueous solution of an alkali metal chlorate and an alkali metal chloride comprises feeding an aqueous alkali metal chloride solution to an electrolysis zone at a constant feed rate. Electric current is supplied to the electrolysis zone at an initial current load. The aqueous alkali metal chloride is electrolyzed to produce a concentrated chlorate solution comprised of an alkali metal chlorate and the alkali metal chloride. A portion of the concentrated solution is fed to an analysis zone and analyzed to measure the ratio of the concentration of the chlorate ion to the concentration of the chloride ion. The measured ratio is compared in a processing zone with a predetermined value range for the ratio and, where the measured ratio falls outside of the predetermined value range, altering the initial current load to the electrolysis zone. The concentrated alkali metal chlorate solution is recovered.
The novel process of the present invention permits the continuous operation of the electrolytic cells by frequently and rapidly determining the chlorate and chloride concentrations by reverse phase liquid chromatography employing an ion pairing eluent solution. The process permits adjustments to the current load and various feed streams to maintain the required ion concentrations without the long delays required by other processes while reducing the requirements for manual operators.
REFERENCES:
patent: 4434033 (1984-02-01), Kaczur et al.
Wescan Ion Analyzer, No. 3, Oct. 1981.
I. Molnar, H. Knauer and D. Wilk, Journal of Chromatography, 201, (1980), pp. 225-240.
Iacoviello Steven A.
Kaczur Jerry J.
Miller Edward G.
Andrews R. L.
Clements Donald F.
Haglind James B.
Olin Corporation
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