Register Now
Dirt Inspection Charts
TAPPI Connect is your centralized networking & collaboration tool.
My TAPPI Story: Rory Wolf
TAPPISAFE
The effects of magnesium, potassium, calcium and silicate ions on pulp quality and reagent consumption in the D1 stage of the ECF bleaching process were investigated on a laboratory scale using batch cooked and oxygen-delignified softwood kraft pulp. Tests were performed by increasing the concentrations of the given ions step by step at the chlorine dioxide stage.
The results indicate that addition of magnesium ions (>1 kg/ODt) decreased clearly viscosity loss of the pulp in the chlorine dioxide stage. An effect similar to that, though much slighter, was observed when potassium ions were added, while calcium and silicate ions behaved like inert material in relation to viscosity drop of the pulp. No real detrimental effect on brightness, reagent consumption or the final technical properties of pulp were found with an increasing tested ions concentration in the chlorine dioxide stage.
Experience the Power of Publications in the 2024 TAPPI Press Catalog
Sponsored by the Recovery Boiler Program R&D Subcommittee of the American Forest & Paper Association (AF&PA) and published by TAPPI Press.
The best-selling text to introduce the entire technology of pulp and paper manufacture.
A project of the Yankee Dryer Safety & Reliability Committee.
TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries.
Available for Purchase – Conference Proceedings
TAPPI maintains a record of key conference papers, presentations, and other conference publications, available for purchase in a variety of formats.
Bleaching Softwood Kraft Pulp: The Role of Certain Common Chemical Elements in the Chlorine Dioxide
