| 摘要 |
A method of preparing granulated zeolite catalysts and sorbents, consisting in that the starting zeolite is shaped into granules. The shaping can be effected either in the presence of a binder taken in a quantity not higher than 30 per cent by weight of the zeolite or without a binder. The resulting granules are treated with a polar liquid at a temperature of 150 DEG to 300 DEG C under a pressure of 80 to 120 atm, dried at a temperature of 100 DEG to 120 DEG C and calcined at a temperature of 380 DEG to 550 DEG C. In case the starting zeolite is used in the Na-form, cation exchange can be effected. From technological considerations it is recommendable that the zeolite granules directly after the shaping thereof be dried at a temperature of 100 DEG to 120 DEG C and calcined at a temperature of 380 DEG to 550 DEG C. The present method allows a considerable increase in the strength of granulated zeolite catalysts and sorbents and, hence, in their efficiency. The mechanical strength of the catalysts and sorbents thus prepared becomes 3 to 10 times higher than that of zeolite catalysts prepared without the treatment of the granules with a polar liquid. No changes are observed in the sorption capacity and catalytic activity of the zeolites. |
