TAPPI TIP 0607-22 2002 presents technical data and calculation methods for comparing the viscosities of various spent sulfite liquors at 26.7°C and other temperatures. The paper discusses measurements using the Oswalt Capillary Viscometer, empirical viscosity equations based on solids concentration and temperature, regression coefficients for different wood species and chemical pulping processes, and the effects of shear rate on non-Newtonian flow behavior.
The document includes a graph of viscosity relationships for magnesium oxide and ammonia sulfite liquors, safety precautions for handling sulfur dioxide and toxic or flammable solvents, keywords covering sulfite pulping and related pulp products, and references to supporting technical publications. It is provided as a five-page PDF for professionals working with pulp and paper process chemistry, liquor characterization, and viscosity calculations.
Application Scope: Suitable for pulp and paper engineers, laboratory personnel, process researchers, and technical specialists evaluating spent sulfite liquor viscosity in chemical, semichemical, and dissolving pulp operations.
