A continuous reaction scheme and an apparatus were designed and developed to synthesize dichlorine monoxide. A convenient and reliable source of Cl₂O was required because the compound is to be used to oxidize concentrated H₂O to O₂(<sup>1/<sup>Δ), which is to be used to pump an iodine laser; I(²P_1/2) -> I(²P_3/2) + hv Dichlorine monoxide is a hazardous compound that cannot be readily made and stored for subsequent utilization. The chemistry that was finally selected for the synthesis was the reaction of Cl₂ with anhydrous sodium carbonate. The chlorine was diluted to approximately 25 mole percent with Nitrogen. The bed was periodically fluidized ("pulsed-fluidization") using only nitrogen. The surface the glass reactor was heated from 290° to 300°. Analyses were performed using an iodometric titration technique. The product gases were collected in carbon tetrachloride or in KI solution. The best chlorine conversion obtained was 89 percent. / M. S.