Patent ID: 6022385
Filing Date: 2000-02-08
Classification: B01D,C01D,C22B

Abstract:
A method of producing sodium carbonate crystals from a sodium carbonate-containing solution comprising the steps of:passing the sodium carbonate-containing solution to a precipitator, said sodium carbonate-containing solution having a sodium carbonate concentration ranging from 100 g/l to saturation;adding methanol to the sodium carbonate-containing solution and the precipitator such that a resultant liquor has methanol in a concentration of between 15 and less than 70% by volume, said methanol being in residence with said sodium carbonate-containing solution for between 10 and 100 minutes;precipitating sodium carbonate crystals from the resulting liquor;washing the precipitated sodium carbonate crystals with an alcohol-containing solution; anddrying the washed precipitated sodium carbonate crystals.