Boundary layer carbonation of trona

摘要

A boundary layer carbonation process for producing sodium bicarbonate crystals having specific surface area in the range 0.4 m2/g to 2.5 m2/g from Trona, wherein in one embodiment the process comprises the steps of: providing Trona particles having a particle size range of −4 +120 mesh; pre-wetting the Trona particles with water to provide a plurality of pre-wetted Trona particles each having a liquid water solution boundary layer deposited thereon; and carbonating the pre-wetted Trona particles across the water boundary layer to provide a product comprising sodium bicarbonate crystals.

主权项

1. A process for converting a sodium carbonate containing ore into sodium bicarbonate, the process comprising: reacting wetted particles of the sodium carbonate containing ore with CO2 via boundary layer carbonation;
wherein said reacting via boundary layer carbonation is carried out with mixing that is sufficient to counter agglomeration of the wetted particles of the sodium carbonate containing ore, and wherein said reacting with CO2 converts the sodium carbonate containing ore into a reacted composition comprising the sodium bicarbonate with a conversion of 25% to 100% in a carbonation residence time of 2 to 45 minutes.