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用原位合成方法直接将高岭土转化为所需形状的低硅X型沸石(PLSX),经X衍射,~(29)Si,~(27)AI MAS NMR谱证实PLSX的结构硅铝比接近1,它含LSX的组成为40.40%,含4A的组成为17.92%,其余为无定形硅、铝氧化物.LSX的骨架硅铝比接近1,是骨架负电荷分配最均匀的X型沸石,293K时静态法测定和推算ISX的饱和吸附水达39.80wt%,LSX的组成为Na(96-x)K_x(Al_(96)S_i(96)O_(384))·310H_2O,是吸附量高、价廉的吸水剂.PLSX对空气中氮氧的分离系数为α(N_2/O_2)=3.15,高于用于PSA的商品5A的α(N_2/O_2)=2.33和已报道的13X的α(N_2/O_2)=2.36.PLSX也是一种极好的吸附分离剂.
The in-situ synthesis of kaolinite directly into the desired shape of the low-silicon X-type zeolite (PLSX), by X-ray diffraction, ~ (29) Si, ~ (27) AI MAS NMR spectroscopy confirmed PLSX structure SiAl close to 1 , Which comprises LSX with a composition of 40.40%, a composition of 4A of 17.92%, and the balance of amorphous silicon and aluminum oxide. The framework Si-Al ratio of LSX is close to 1 and is the most uniform X-type zeolite with negative skeletal distribution, 293K When the saturated adsorption water of ISX is 39.80wt%, the composition of LSX is Na (96-x) K_x (Al_ (96) S_i (96) O_ (384)) · 310H_2O, The separation coefficient of nitrogen and oxygen in air by PLSX is α (N 2 / O 2) = 3.15, which is higher than α (N 2 / O 2) = 2.33 of commercial 5A for PSA and α (N 2 /O_2)=2.36.PLSX is also an excellent adsorbent.