Patent ID: 8828338

Claim:
A process for making aqueous solutions of alkaline bicarbonates and/or alkaline earth bicarbonates comprising the steps of: dissolving gaseous carbon dioxide in water to produce an aqueous solution containing bicarbonates, HCO 3 − ; and further containing hydronium cations, H 3 O + , introducing a solid cationic exchanger material [(M x/n +n )E x − ] to capture the hydronium cations, H 3 O + and produce used cationic exchanger material [(H 3 O + ) x E x − ], according to: [(M x/n +n )E x − ]( s )+ x H 3 O + (aq)=[(H 3 O + ) x E x − ]( s )+ x/n M +n (aq) where “X” stands for a molar amount of anionic centers of charge of the cationic exchanger material [(M x/n +n )E x − ] balanced by x/n molar amount of non framework metal M, “n” stands for the metal valence, and “M” is selected from the group consisting of Group 1A and Group 2A of the periodic table of elements; whereby the capture of the hydronium cations, H 3 O + , increases the yield of the bicarbonates, and regenerating the used cationic exchanger material, [(H 3 O + ) x E x − ], by ion exchange with an unsaturated solution of ionic salt of metal M +n such that the equivalents of the metal M +n is at least 0.5 times the equivalents of E x − .