PROCEDIMIENTO DE OBTENCIËN DE CARBONATO SËDICO

摘要

The pouring (bulk) density of light Na2CO3, obtained from the ammonia-soda process, is increased from about 0.5 gm./cc. by absorbing aqueous NaOH in and on the particles followed by carbonation with a CO2 bearing as (e.g. flue gas). The density increase is greater than that theoretically calculated and by absorbing and carbonating 5% by weight NaOH, a density of 0.72 to 0.74 is obtained. Above 5% NaOH the density increase is less rapid but still greater than theoretical. The NaOH solution may be 45 to 50% by weight. Carbonation may take place at 100 DEG to 150 DEG C. and excess of CO2 of 10 to 30% above theoretical may be employed.