Technical Bulletin No. 0024: Black Liquor Oxidation as a Method for Reducing Air Pollution from Sulfate Pulping and Foam Fractionation of Black Liquor from Sulfate Pulping (AQTB)
The attached National Council Technical Bulletin No. 24 contains reprints of two research papers dealing with black liquor oxidation by Dr. E. R. Hendrickson and Dr. C. I. Harding of the University of Florida. These investigations were stimulated by the National Council’s project at the University and in cooperation with the NCSI Southern Research Center at Louisiana State University. The first paper, entitled "Black Liquor Oxidation as a Method of Reducing Air Pollution from Sulfate Pulping," presents data indicating that black liquor oxidation reduces gaseous sulfur emissions from kraft recovery furnace stacks from between 80 and 95 percent. The second, entitled "Foam Fractionation of Black Liquor from Sulfate Pulping," indicates that it may be possible to employ foam fractionation to both oxidized weak black liquor and increase the yield of tall oil from the liquor. Cost computations indicated an equipment pay-off of less than two years might be possible - through the added chemical and tall oil capture obtained.