ADSORBENT-DESICCANT AND PREPARATION METHOD THEREOF Russian patent published in 2012 - IPC C01F7/02 B01J20/08 B01D53/26 

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry. The spherically shaped adsorbent-desiccant is prepared by balling moist powder of a nanostructured oxygen-containing aluminium compound. The granules undergo thermal-steam treatment in air at the first step at temperature 20-25°C for 1-20 hours, at the second step at 100-120°C for 1-20 hours and calcination at 450-550°C in a current of dry air and rate of heating to calcination temperature of 20-50°C/h for 2-6 hours. The nanostructured oxygen-containing aluminium compound of formula: Al₂O_3-x(OH)_x·nH₂O, where x is in the range of 0-0.28 and n is in the range of 0.1-0.4, is mixed with a modifying additive such as: CaO and/or Na₂O, and/or MgO, and/or zeolite. A spherically shaped adsorbent-desiccant is obtained, which contains aluminium oxide in form of a mixture χ-, η-, γ- and is X-ray amorphous, and a modifying additive such as: zeolite and/or (in terms of) CaO and/or Na₂O, and/or MgO is also obtained.

EFFECT: invention increases adsorbent capacity.

11 cl, 1 tbl, 35 ex