IMPROVED PROCESS FOR THE CONTINUOUS PRECIPITATION OF ALUMINA HYDRATE FROM BAYER PROCESS LIQUOR

摘要

1275856 Alumina hydrate KAISER ALUMINUM & CHEMICAL CORP 12 Oct 1970 48310/70 Addition to 1215375 Heading C1A Alumina hydrate is prepared from a supersaturated caustic aluminate liquor by a continuous process according to parent Specification modified in that the liquor having an alumina to caustic (A/C) ratio greater than 0À500 is continuously fed to the first precipitation stage at a temperature greater than 170‹ C. but more than 185‹ C.