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[摘要]：The investigation of the crit. synthesis parameters of germanosilicate of UTL topol., possessing 14- and 12-rings, has been carried out in detail. (6R,10S)-6,10-Dimethyl-5-azoniaspiro[4.5]decane hydroxide was used as the structure-directing agent (SDA). The kinetics of the synthesis, the role of the Si/Ge ratio in the synthesis mixt., and the effect of the calcination procedure were investigated in relation to the crystallinity and textural properties of the synthesized material. The optimum synthesis time was found to be six days for Si/Ge and (Si+Ge)/SDA molar ratios of 2 and 1.7, resp. The UTL zeolite crystallizes as small sheets of 10 mm in size. The micropore vol. of the best crystals is 0.22 cm3 g-1 with a micropore diam. of 1.05 nm, based on DFT and Saito-Foley analyses of adsorption data. |
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