Zeolite ZSM-12 was synthesized by a direct hydrothermal method and subsequently desilicated by alkaline treatment under different conditions. Changes in the properties of the zeolite samples were investigated by XRD, nitrogen adsorption/desorption isotherms, SEM, ICP-OES, and temperature programmed desorption of ammonia. Nitrogen adsorption measurements showed that the mesopore volume of the treated samples increased while the micropore volume decreased as a consequence of the desilication with NaOH. The Si/Al ratio of the desilicated samples decreased while the strong acidic sites determined by NH₃-TPD were virtually unchanged. An L₉ orthogonal array of Taguchi method was used to investigate the optimum desilication conditions on mesopore volume. Catalytic activity of the samples were tested in the benzylation of benzene to diphenyl methane and the zeolite treated with 0.2 M NaOH at 85 °C for 60 min enhanced the catalytic activity 10-fold compared to the parent sample of HZSM-12.

沸石ZSM-12是通过直接水热法合成的，然后在不同条件下通过碱处理脱硅。通过XRD，氮吸附/解吸等温线，SEM，ICP-OES和程序升温的氨解吸研究了沸石样品的性能变化。氮吸附测量显示，由于用NaOH脱硅，处理后样品的中孔体积增加，而微孔体积减少。脱硅样品的Si / Al比降低，而NH ₃ -TPD测定的强酸性位几乎没有变化。安₉采用Taguchi法正交阵列研究中孔体积的最佳脱硅条件。在苯苄基化为二苯甲烷的过程中测试了样品的催化活性，与H​​ZSM-12的母体样品相比，用0.2 M NaOH在85°C处理60分钟的沸石将催化活性提高了10倍。