METHOD OF PROCESSING LOW-GRADE BAUXITE INTO SILICA ACCORDING TO SUCCESSIVE BEYER-SINTERING SCHEME Russian patent published in 1998 - IPC

FIELD: industrial organic synthesis. SUBSTANCE: method includes grinding bauxite with return solution, leaching ground material, dissolving cooked pulp by non-desiliconized sintering aluminate solution with solid component content not higher than 13 g/l, desiliconizing aluminate solution, concentrating and washing red sludge, decomposing aluminate solution to form aluminum hydroxide and return solution, sintering red sludge with limestone and soda, and leaching sludge cake to yield aluminate solution and cake sludge. EFFECT: simplified process due to elimination of desiliconizing conversion stage. 3 cl