| 摘要 |
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, hydroysultaines, 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. |
| 主权项 |
1. 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 group consisting of:
sulfates, in particular sodium sulfate and organosulfates;sulfonates;polysulfonates;amines, in particular primary amines, cyclic amines, quaternary amines comprising at least one carboxylic acid group;hydroxysultaines;polycarboxylates;polyethers and ether-phenols;sulfosuccinates;amidosulfonates;aminosulfonates;alkali metal hexametaphosphate in particular of sodium or potassium; andphosphates, in particular organophosphates, and phosphonates; and the additive is present in the solution at a concentration of at least 1 ppm. |
