Calcium Carbonate → Sodium Carbonate

Participants

Reaction Steps

reacting sodium tungstate in the liquor with calcium carbonate at a temperature of at least about 130° C. to form sodium carbonate and solid calcium tungstate, while providing sufficient carbon dioxide overpressure to the slurry to convert sodium carbonate in the slurry to sodium bicarbonate and thereby promote the conversion of sodium tungstate to calcium tungstate, thereby forming a product slurry containing a sodium bicarbonate liquor and a solid calcium tungstate concentrate which can be recovered from said product slurry and,

Provenance & Evidence