梯级孔道、复合酸碱金属氧化物催化烯烃合成对二甲苯

Para-xylene is important organic chemical in industry, mainly used as raw materials for polyester. It has wide applications in many fields such as textiles, electronics, coatings, etc. The existing industrialized technologies to obtain para-xylene are the disproportionation and alkyl transfer process, xylene isomerization process and adsorption separation process. These technologies which utilize the reformed naphtha and other fossil resources as raw materials are not green and sustainable. However，the route which obtains para-xylene from biomass derived materials has a long-term strategic significance for the sustainable development of the economy and society. On the basis of preliminary studies, this project plans to systematically research the process of olefin aromatization to para-xylene with high selectivity for the biomass route. The synthesis of hierarchical porous acid-base composite catalytic materials would be investigated. Then the cyclization, isomerization and dehydrogenation reactions of olefin would be studied over the novel catalysts to understand the structure-effect relation. The deactivation and coking behavior also will be researched to obtain the novel catalyst with high activity, good stability, less coking and sintering. To understand the basis olefin aromatization the mechanism would be studied preliminary. This project on the reaction and catalysts might provide a new route to convert the biomass derived materials to para-xylene, disassociating the reliance on petrochemical resources.And this project also would provide theoretical and technical reference for other long-chain alkene aromatization.

对二甲苯是重要的有机化工原料，主要作为聚酯的原料，在纺织、电子、和涂料等诸多领域广泛应用。现有工业化技术主要以重整石脑油等化石资源为原料，采用歧化及烷基转移、二甲苯异构化、吸附分离工艺等手段获得对二甲苯。通过生物质路线获得基础结构化学品对二甲苯对社会的可持续发展具有长远战略意义。本项目拟针对生物基对二甲苯路线中的关键反应--二异丁烯芳构化过程进行研究，通过梯级孔道酸碱复合催化材料可控合成，开展二异丁烯在该类材料上的环化-异构化-脱氢反应性能研究，关联催化剂构效关系，深入理解反应积碳行为，获得高活性、良好稳定性的脱氢环化催化新材料，并在理解高效催化的基础上进行二异丁烯芳构化的机理探讨。对该反应体系及催化剂的研究，将为合成对二甲苯提供一条生物质转化的新路线，也为其他长链烯烃芳构化提供理论和技术借鉴。

本项目针对生物基对二甲苯路线中的关键反应--二异丁烯芳构化过程开展了研究，合成了梯级多孔的酸碱复合催化材料，开展了二异丁烯在该类材料上的选择性芳构化反应性能研究，获得了高活性、具有良好稳定性的选择性芳构化催化新材料，研究了催化剂的性质与催化性能之间的关系，探讨了反应积碳行为，并在理解高效催化的基础上进行了二异丁烯芳构化反应路径的初步探讨。除了完成计划书的既定目标之外，还开展了催化剂放大制备并用于固定床单管小试实验,初步进行了工艺流程设计的尝试。对该反应体系及催化剂的研究，将为合成对二甲苯提供一条生物质转化的新路线，为烯烃芳构化潜在的工业应用积累了基础数据，也为其他长链烯烃芳构化提供理论和技术借鉴。