The reaction products obtained by treating C 4A•nH 2O with various inorganic salts and acid-containing solutions were characterized. The anions taken into consideration were carbonate, chloride, nitrate, sulfate and acetate. As counter-cation H +, NH 4 +, Na + and Ca 2+ were chosen, thus obtaining different pH values according to the specific solution utilized. C 4A•nH 2O gives place to two competing and reversible reactions: exchange of the interlayer OH anions according to the following selectively sequence: CO 3 2-?SO 4 2-> Cl -> NO 3 -> CH 3COO - and an antacid behaviour towards aqueous solutions containing less selective anions.
A study on the reactivity of C4An . H2O with aqueous solutions
MARROCCOLI, Milena
1986-01-01
Abstract
The reaction products obtained by treating C 4A•nH 2O with various inorganic salts and acid-containing solutions were characterized. The anions taken into consideration were carbonate, chloride, nitrate, sulfate and acetate. As counter-cation H +, NH 4 +, Na + and Ca 2+ were chosen, thus obtaining different pH values according to the specific solution utilized. C 4A•nH 2O gives place to two competing and reversible reactions: exchange of the interlayer OH anions according to the following selectively sequence: CO 3 2-?SO 4 2-> Cl -> NO 3 -> CH 3COO - and an antacid behaviour towards aqueous solutions containing less selective anions.File in questo prodotto:
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