NOVELTY - Process (A) for synthesizing alkali bicarbonate comprises: (a) providing electrolytic cell (100) comprising alkali ion conductive membrane (110); (b) introducing aqueous alkali carbonate into anolyte compartment; (c) electrolyzing aqueous alkali carbonate at anode by electrolyzation of water to give protons, electrons and oxygen and/or electrolyzation of alkali metal carbonate compounds (I) to give alkali metal cations, electrons, carbon dioxide and oxygen; (d) reacting proton and/or carbon dioxide with aqueous alkali carbonate; and (e) recovering alkali bicarbonate.    USE - The processes are useful for synthesizing alkali bicarbonate, pure alkali hydroxide, pure alkali methoxide, oxygen and hydrogen (all claimed).    DETAILED DESCRIPTION - Process (A) for synthesizing alkali bicarbonate comprises: (a) providing an electrolytic cell (100) comprising an alkali ion conductive membrane (110) positioned between an anolyte compartment (112) configured with an anode (116) and a catholyte compartment (113) configured with a cathode, where the alkali conductive membrane is configured to selectively transport alkali ions and prevent the transport of anions produced in the catholyte compartment; (b) introducing aqueous alkali carbonate into the anolyte compartment; (c) electrolyzing aqueous alkali carbonate at the anode by performing the reaction including electrolyzation of water to give 2 moles of protons, 2 moles of electrons and half mole of oxygen, and/or the reaction including electrolyzation of alkali metal carbonate compounds of formula (MCO3) (I) to give 2 moles of alkali metal cations, 2 moles of electrons, carbon dioxide and half mole of oxygen; (d) reacting proton and/or carbon dioxide with aqueous alkali carbonate using the reaction (a1) including reacting carbon dioxide, metal carbonate compound of formula (M2CO3) (II) and water to give 2 moles of metal bicarbonate compound of formula (MHCO3) (III) as a precipitate and/or reacting proton and (II) to give metal cation and 1 mole of (III); and (e) recovering the alkali bicarbonate.    M = Li, Na or K.    INDEPENDENT CLAIMS are also included for:    (1) process (B) for synthesizing pure alkali hydroxide from alkali carbonate comprising: performing steps (a)-(c); performing reaction (b1); and recovering the pure alkali hydroxide; and    (2) process (C) for synthesizing pure alkali methoxide from alkali carbonate and methanol comprising: performing steps (a)-(c); performing reaction (c1); and recovering the pure alkali methoxide.    DESCRIPTION OF DRAWING(S) - The figure shows the electrolytic cell for conversion of alkali carbonate to alkali hydroxide and alkali bicarbonate.    Electrolytic cell (100)    Alkali ion conductive membrane (110)    First anolyte compartment (112)    First catholyte compartment (114)    First anode (116)