in water ion exchange method: treatment of amberlite I RC-50 (Na-form) with H2O containing CO2 under pressure, regeneration of resin by treatment first with lime soln., then with NaCl-soln.;;
参考文献
Asahi Garasu Kenkyu Hokuku, , vol. 2, p. 134 - 147
C. A., , p. 2931
in not given reaction of an excess of CO2 with Na2O2 forming percarbonate; pptn. of perborate and formation of soln. of NaHCO3 on mixing equimolar amounts of percarbonate and sodium borate; use of formed hydrogencarbonate as educt for prepn. of NaBO3;; addition of alkali earth silicates or Mg-silicate or phenol to prevent decomposition of NaBO3;;
in water byproducts: NH4Cl; generation of solid (NH4)2CO3 by react. of NH3, CO2 and H2O in the gas phase, dissolved to nearly satd. NaCl soln., introduction of CO2, pptn. of NaHCO3; recovery of CO2 by calcination of NaHCO3, of NH3 by distn. of NH4Cl soln. with Ca(OH)2;;
