| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to chemistry and can be used in catalytic processes. Amorphous zirconium hydroxide has surface area of at least 300 m2/g, total pore volume of at least 0.70 cm3/g and average pore size from 5 nm to 15 nm. First, an aqueous solution containing sulphate anions and a zirconium salt with the ratio ZrC2:SO3 ranging from 1:0.40 to 1:0.52 are obtained. The solution is then cooled to temperature lower than 25C. Alkali is then added to precipitate amorphous zirconium hydroxide which is then filtered and washed with water or alkali to remove residual sulphate and chloride. The washed residue undergoes thermal treatment at excess pressure of not less than 3 bars and dried. ^ EFFECT: obtained zirconium hydroxide is characterised by large surface area, large pore volume and wide pore size distribution. ^ 26 cl, 2 tbl, 2 dwg |
