Process for the manufacture of sodium carbonate crystals from mi

Details Process for the manufacture of sodium carbonate crystals from mi Process for the manufacture of sodium carbonate crystals from mi

1996-04-29

2000-02-08

Straub, Gary P.

Chemistry: physical processes

Physical processes

Crystallization

23298, 23300, 4232062, 423421, 423422, C01D 130, C01D 714, C01D 724, B01D 902

Patent

active

060223855

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

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