METHOD FOR PRECIPITATING BOEHMITE FROM PRE-PRECIPITATION BAYER LIQUORS

摘要

A method for precipitating boehmite from a pre-precipitation Bayer liquor, the method comprising the steps of: treating the pre-precipitation liquor to decrease both the total caustic concentration and the total alkalinity of the pre-precipitation liquor; and pre-precipitating boehmite from the treated pre-precipitation liquor, wherein at least a portion of the boehmite is precipitated at a temperature of at least 105 °C.