Rates of Continuous Foam Fractionation of Dilute Kraft Black Liquor

Abstract

Dilute solutions of black liquor obtained from the kraft pulping of Pinus radiata have been subject to continuous foam separation in laboratory-scale equipment. A power function relationship between the foam fractionation rate and both the air rate and the effluent or bottoms concentration has been established which is similar to that previously developed for binary solutions of pure surfactants.