It is desirable to develop eco-friendly structure-directing agents as an alternative to the highly toxic templates during the synthesis process of many zeolites. In this work, a MWW type zeolite (denoted as CC-MCM-56) was stably synthesized with ITQ-1 seed assistance by using a green and nuisance-less choline chloride (CC) as organic structure-directing agents instead of the conventional toxic (HMI) template. The CC-MCM-56 zeolite exhibited similar physicochemical properties to the conventional MCM-56 (HMI), including acid properties, high specific surface area, especially high external specific surface area and mesoporous volume, which performed an excellent result in the liquid-phase alkylation reaction of benzene with long-chain olefins. Our findings reveal that the synergistic effect of ITQ-1 seed and CC molecule enable a longer and more stable crystallization period during the synthesis process of MCM-56 zeolite. The SAXS result coupled with other techniques indicate that ITQ-1 seed is firstly dissolved to form more structural units which could interact with CC molecules, making more CC molecules attached to the surface half cup of the MWW lamellae and promoting the stable synthesis of CC-MCM-56 zeolite with thinner-layer structure. Finally, the synthesized CC-MCM-56 zeolite showed high reactivity and the conversion of 1-hexane and 1-dodecene achieved 90.5% and 90.6% respectively.

中文翻译：

---

以氯化胆碱为模板绿色稳定合成MCM-56沸石

在许多沸石的合成过程中，需要开发环境友好的结构导向剂作为剧毒模板的替代品。在这项工作中，使用绿色无公害的氯化胆碱（CC）作为有机结构导向剂代替传统的有毒物质，在 ITQ-1 种子辅助下稳定合成了 MWW 型沸石（表示为 CC-MCM-56）。 （人机界面）模板。 CC-MCM-56沸石表现出与传统MCM-56（HMI）相似的物理化学性质，包括酸性、高比表面积，特别是高外比表面积和介孔体积，在液相中表现出优异的结果苯与长链烯烃的烷基化反应。我们的研究结果表明，ITQ-1 晶种和 CC 分子的协同作用可以在 MCM-56 沸石的合成过程中实现更长、更稳定的结晶期。 SAXS结果结合其他技术表明ITQ-1种子首先溶解形成更多可以与CC分子相互作用的结构单元，使更多的CC分子附着在MWW片层的表面半杯上并促进CC-的稳定合成具有薄层结构的MCM-56沸石。最终合成的CC-MCM-56沸石表现出较高的反应活性，1-己烷和1-十二碳烯的转化率分别达到90.5%和90.6%。