Method for preparing alkali metal bicarbonate particles
AssigneeSolvay SA
InventorDavid Jean Lucien Savary
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Abstract
A method for preparing alkali metal bicarbonate particles by crystallization from an alkali metal carbonate and/or bicarbonate solution with an additive present in the solution, chosen from among sulfates, sulfonates, polysulfonates, amines, hydroxysultaines, polycarboxylates, polysaccharides, polyethers and ether-phenols, alkali metal hexametaphosphate, phosphates, sulfosuccinates, amidosulfonates, amine sulfonates, preferably chosen from among polysaccharides, and such that the additive is present in the solution at a concentration of at least 1 ppm and preferably at most 200 ppm.
Claims21
A method for preparing, by crystallization, alkali metal bicarbonate particles starting from a solution of alkali metal carbonate and/or bicarbonate in the presence of an additive in the solution,
- wherein the additive is selected from the group consisting of hydroxypropylguar, alginic acid or salts thereof, and carboxymethylcellulose;
- and
- wherein the additive is present in the solution at a concentration of at least 1 ppm.
Dependencies are inferred from the claim text.