| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention can be used to dry gases. The aluminium oxide-based drying agent contains the following, wt %: ç-Al2O3 and an X-ray amorphous phase - 35-95; -Al2O3 and -Al2O3 - 5-65, has pore volume 0.25-0.6 cm3/g, effective average pore diameter 2.5-10 nm and specific surface area 200-400 m2/g, wherein the specific surface area of micropores with diameter less than 2 nm ranges from 100 to 300 m2/g. To obtain the drying agent, a product of centrifugal thermal activation of hydrargillite and/or thermochemical activation of hydrargillite is hydrated in an alkaline or acidic medium, dried, ground, plasticised and the obtained paste is extrusion moulded, dried and annealed in a current of dry air. Hydration of the ground product in an alkaline or acidic solution is carried out with intense stirring and liquid to solid ratio from 1 to 4 for 4-8 hours. Hydration of the non-ground product in alkaline or acidic solution is carried out in a ball mill with liquid to solid ratio from 1 to 2 for 4-24 hours. The extruded articles are annealed for 2-6 hours at 350-600C, volume rate of feeding air equal to 1000-10000 h-1, and rate of heating to annealing temperature equal to 20-50C/h. ^ EFFECT: high dynamic capacity of the adsorbent-drying agent. ^ 19 cl, 1 tbl, 16 ex |
