Synthesis of zeolite ZSM-5
    4.
    发明授权
    Synthesis of zeolite ZSM-5 失效
    沸石ZSM-5的合成

    公开(公告)号:US4526879A

    公开(公告)日:1985-07-02

    申请号:US520746

    申请日:1983-08-05

    IPC分类号: B01J29/40 C01B39/40 C01B33/28

    摘要: As synthesized by conventional technique, zeolite ZSM-5 is crystallized in the presence of substantial amount of tetraalkylammonium cations, the alkyl groups of which contain 2 to 5 carbon atoms, such as, for example, tetrapropylammonium. When synthesized in the conventional way, ZSM-5 contains tetraalkylammonium cations as well as a substantial amount of sodium ions. To obtain a more catalytically active form of ZSM-5, the sodium ions must be exchanged to very low levels. By synthesizing zeolite ZSM-5 according to the present method, i.e., in the presence of a combination of an amine and a halide in the presence of a mutual solvent and with a specifically defined reaction mixture composition, ZSM-5 having different organic nitrogen-containing cations but the same crystal structure as conventionally prepared ZSM-5 is obtained. The ZSM-5 prepared in accordance herewith is very low in sodium content as synthesized and has a crystal size of from about 0.05 microns to about 20 microns.

    摘要翻译: 如通过常规技术合成的,沸石ZSM-5在存在大量四烷基铵阳离子(其烷基含有2至5个碳原子的四烷基铵阳离子)存在下结晶,例如四丙基铵。 当以常规方式合成时,ZSM-5含有四烷基铵阳离子以及大量的钠离子。 为了获得更具催化活性的ZSM-5形式,钠离子必须交换到非常低的水平。 通过根据本发明的方法合成沸石ZSM-5,即在相互溶剂存在下,在胺和卤化物的组合存在下,与特定定义的反应混合物组合物,具有不同有机氮气的ZSM-5, 得到与常规制备的ZSM-5相同的晶体结构。 根据本文制备的ZSM-5的钠含量非常低,并且具有约0.05微米至约20微米的晶体尺寸。