Boundary layer carbonation of Trona
AssigneeChurch & Dwight Co., Inc.
InventorsDragomir M. Bracilovic, Andrew D. Kurtz, Joseph Paluzzi, Zbigniew M. Senk
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Abstract
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.
Claims23
A boundary layer carbonation process for the production of sodium bicarbonate from Trona, the process comprising the steps of:
- providing Trona particles having a size range between 37 microns to 500 microns inclusively;
- pre-wetting the Trona particles with water to provide a plurality of pre-wetted Trona particles with a liquid water film around the pre-wetted Trona particles;
- and
- boundary layer carbonating the pre-wetted Trona particles while mixing so as to counter agglomeration of the pre-wetted Trona particles and to convert the pre-wetted Trona particles into a reacted composition comprising sodium bicarbonate having a surface area between 0.4 m2/g and 2.5 m2/g with a conversion of 25% to 100% in a carbonation residence time of 2 to 45 minutes.
Dependencies are inferred from the claim text.