CRYSTALLIZATION OF SODIUM CARBONATES USING ALCOHOLS,申请号US1997006429-传众专利搜索

CRYSTALLIZATION OF SODIUM CARBONATES USING ALCOHOLS

申请公布号：WO1997041271(A1)

申请号：US1997006429

申请日期：1997.04.17

申请公布日期：1997.11.06

摘要：<p>A method of producing sodium carbonate crystals (34) from a sodium carbonate-containing solution (14) including the steps of passing the sodium carbonate solution (14) to a precipitator (12), adding methanol (16) to the sodium carbonate solution (14) in the precipitator (12) such that a resultant liquor has methanol in a concentration of between 15 % and 70 % by volume, precipitating the sodium carbonate from the resultant liquor (18), washing (20) the precipitated sodium carbonate crystals with an alcohol-containing solution (22) and drying the washed precipitated sodium carbonate crystals. The sodium carbonate-containing solution (14) has a sodium carbonate concentration ranging from 100g/l to saturation. The methanol is in residence with the sodium carbonate containing solution for between 10 and 100 minutes. The alcohol-containing solution (16) has an alcohol concentration ranging between 50 % and 100 %.</p>