Foam Fractionation of Black Liquor From Sulfate Pulping |
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| Authors: | C I Harding PhD E R Hendrickson PhD |
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| Institution: | 1. Assistant, Research Professor, Air Pollution Research Laboratory , University of Florida , Gainesville , USA;2. Professor, Air Pollution Research Laboratory , University of Florida , Gainesville , USA |
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| Abstract: | The principal deterrent of general acceptance of weak black liquor oxidation by mills pulping southern pine is the extensive foam produced during the oxidation of the liquor. The foam results from relatively high concentrations of fatty and rosin acid soaps remaining in the black liquor after roughly 75% of these compounds have been removed by skimming as marketable by-products. The foaming propensity of black liquor can be used to advantage to provide additional by-product recovery while the black liquor is being oxidized. This paper will report the results of foam fractionation studies on such black liquors conducted in this laboratory. |
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