PROCESS FOR PREPARING HIGHLY BASIC ANIONITE HAVING LOW CHLORINE CONTENT Russian patent published in 1995 - IPC

FIELD: electronic industry. SUBSTANCE: anionite is first treated with a sodium or potassium or ammonium carbonate or bicarbonate solution at 58 ± 2 C and the whole is then subjected to thermohydrolysis with a sodium or potassium or ammonium hydroxide solution under dynamic conditions at 58 + 2 C and the whole is treated with an aqueous solution of the same salts at 58 + 2C, washed with desalted water at 50 + 2 C, treated with a sodium or potassium or ammonium hydroxide solution at 69 + 2 C and washed out with completely desalted water at 50 + 2 C. Each stage is performed in an individual apparatus, for which purpose the anionite pulp is transferred together with the solution for 3-90 min and the liquid phase is squeezed out. EFFECT: greater efficiency of the process. 3 cl, 1 tbl