Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1992-01-31
1993-05-25
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
204416, 204409, G01M 2726
Patent
active
052136680
ABSTRACT:
A method and apparatus for the monitoring and control of concentration of an ion in a solution at an elevated temperature of at least 100.degree. C. are disclosed. The method comprises the steps of contacting a first electrode with a flowing first solution containing said ion at the elevated temperature, and contacting a second electrode with a second flowing solution containing said ion at the elevated temperature. The rate of flow of the second solution is substantially lower than the rate of flow of the first solution. The first and second solutions are then contacted or admixed. The electrodes must be capable of detecting the ion at the elevated temperature and have the same response characteristics to changes in concentration of the ion at the elevated temperature. The concentration of the ion in the second solution is measured at a temperature lower than the elevated temperature under conditions permitting accurate measurement of the concentration of the ion, and the concentration of the ion in the first solution is monitored and controlled by adjusting the concentration of the ion in at least one of the first and second solutions. The method is particularly adapted for the monitoring and control of salt solutions used in the manufacture of polyamides, using palladium hydride electrodes.
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Bell Bruce
Du Pont Canada Inc.
Niebling John
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