| 摘要 |
<p>The invention concerns a method for preparing compositions containing essentially an absorbent anhydrous alkaline metal carbonate, consisting in a thermal treatment of ammonium bicarbonate at a temperature ranging between 80 °C and 400 °C, in a non-confined atmosphere. The invention also concerns compositions containing essentially an absorbent anhydrous alkaline metal carbonate, obtainable by said method, having a porosity generating absorbency of at least 40 % with respect to the absorbed agent, a residual water or moisture content of not more than 0.5 wt. %, and an average particle diameter (d50) ranging between 30 and 80 microns.</p> |
