Oxidation of white liquor using a packing column

摘要

A method of producing oxidized white liquor from white liquor in which sodium sulfide is oxidized to sodium sulfate. In accordance with the method, an oxygen containing gas is contacted with the white liquor at a temperature of at least 110 DEG C. and such that the total pressure of oxygen and water vapor is no less than 9.2 atmospheres during the contacting.