A procedure for the extraction of valuable amounts of alumina from the types gibbsita and boehmita from bauxita. (Machine-translation by Google Translate, not legally binding)

摘要

A procedure for extracting valuable amounts of gibbsite and boehmite types alumina from bauxite having an iron content of less than 5% (calculated as Fe2O3) in which bauxite is digested at a temperature of 225º at 270 °, in liquid exhausted from the Bayer process containing 150 to 300 g/liter of caustic soda (calculated as Na2CO3), at a loading ratio of alumina/caustic soda in the range of 0.60 to 0.66, characterized for adding 1 to 4 g/liter of lime (calculated as equivalent Na2CO3). (Machine-translation by Google Translate, not legally binding)