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US 8,262,855 B2Granted
Method for determining the total peroxide content of pulp suspension
AssigneeMetso Automation Oy
InventorsTeuvo Peltomāki, Aleksi Pohjola, Pasi Antero Keinänen
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Abstract
A method and an apparatus for determining the total peroxide content of a cellulose pulp suspension in the pulp suspension bleaching stage, wherein the bleaching chemical is peroxide. A sample is taken from the pulp suspension, which sample is measured in a measuring device (25, 25′). Before measuring, the pH of the sample is adjusted and after that the total peroxide content or the perhydroxyl content of the sample is measured, of which measurement the total peroxide content of the sample is determined.
Claims10
A method for determining a total peroxide content of a pulp suspension comprising:
- taking at least one sample from the pulp suspension, from which the sample is measured in an electrochemical measuring device;
- and
- measuring
- a) a total peroxide content of the sample;
- or
- b) a perhydroxyl ion content of the sample, of which measurement the total peroxide content of the sample is determined;
- wherein, before either measurement, a pH of the sample is adjusted.
4 more elements
Dependencies are inferred from the claim text.