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1985年Bibby首次在非水体系中合成了纯硅方钠石,由此开创了一条合成分子筛的新途径。徐文旸等首次在Na_2O-SiO_2-Al_2O_3一有机胺非水体系中合成了丝光沸石(简称非水丝光沸石,用NAM表示)。晶化过程中液相无硅铝酸根离子,固相硅铝比始终保持不变,是典型的固相转化过程。利用非水体系这一特点,可以定向地合成出催化反应所需硅铝比的沸石。与水热体系相比,非水体系合成的丝光沸石在邻二甲苯异构化催化性能上要优于前者。
In 1985, Bibby first synthesized pure sodalite in a non-aqueous system, thus creating a new way to synthesize molecular sieves. Xu Wenli for the first time in the Na_2O-SiO_2-Al_2O_3 organic amine aqueous system synthesis of mordenite (referred to as non-aqueous mordenite, with NAM said). In the crystallization process, the liquid phase is free of alumino-aluminate ions and the solid-state Si / Al ratio is always the same, which is a typical solid-phase conversion process. Utilizing the non-aqueous system, zeolite can be directionally synthesized for the silica-alumina ratio required for the catalytic reaction. Compared with the hydrothermal system, the mordenite synthesized by non-aqueous system is superior to the former in the ortho-xylene isomerization catalytic performance.