Simple synthesis of novel triple-effect polyionic liquid for efficient production of lignite-derived aromatic hydrocarbons

The invention belongs to the technical field of new material synthesis, and relates to a method for preparing a stable and efficient multifunctional polymerized ionic liquid catalyst and producing lignite-derived aromatic hydrocarbons. According to the method, magnetic nanoparticles linked by a cross-linking agent and double basic ionic liquid are used as catalysts, complex C-O bridged bonds in the lignite are depolymerized at 300 DEG C under the hydrogen pressure of 4 MPa in 20 mL of n-hexane, and the total yield of the obtained lignite-derived aromatic hydrocarbon is 32.70%. The yield is due to the fact that the catalyst has double-base synergy, excellent hydrophobic property and rich mesoporous structures, and the stable catalytic activity of the multifunctional polymeric ionic liquid catalyst is ensured. Wherein the abundant pore structure of the catalyst can limit the range of the substrate, so that the stable and rapid depolymerization of the raw material is ensured. After reaction, the catalyst is rapi