Construction And Performance Of Acidic Functional Solid Catalyst Based On Ionic Liquid Structure Unit

As a commonly used industrial raw material,alkyl benzene has played an important role in both daily life and industrial production in recent year.At the same time,alkylation catalysts have therefore received much attention.But traditional alkylation catalysts have limitations such as inability to separate from the reaction system and high catalytic toxicity.The solid acid catalyst can make up for the shortcomings of the traditional acid catalyst because it facilitates the separation of reactants and products in the catalytic reaction system.Therefore,it is important to develop new kinds of solid acid catalyst materials with excellent catalytic performance to achieve scientific significance and satisfy urgent industrial application needs.Polymeric ionic liquids have the excellent chemical stability of ionic liquids and own the solid structure of polymer which has attracted widespread attention.This article considers the physical and chemical properties of polymeric ionic liquids to design and synthesize a series of different polymeric ionic liquids with loose pore structures solid acid catalyst and solid acid catalyst hybridized with ionic liquid and functional metal organic framework.Selecting different types of ionic liquids,introducing different types and amounts of acidic functional groups and combining the performance of functional metal organic frameworks.This article obtained the following main results and conclusions:（1）Use the template method to synthesize the mono-acidic polymerized ionic liquid solid catalyst TMVPC-T（x）.After introducing phosphotungstic acid,obtain the protonated acidified TMVPC-T（x）-PW catalyst.When the ratio of monomer to crosslinking agent is 1:2,the catalytic reaction temperature is 120°C,and the addition amount of catalyst TMVPC-T（1:2）-PW is 0.75 wt%,the catalyst is The best conversion rate（100%）and PXE yield（86.02%）can be achieved in the basification reaction.（2）In order to explore the dual solid acidic polymeric ionic liquid catalysts furtherly,the double-acid functionalized P（BVS-SO₃H）-SO₃CF₃ was synthesized by using a new cross-linked mesoporous double-acid polymeric ionic liquid with three monomers and post-treatment of sulfonated ion exchange was applied in the polymer backbone.When the molar ratio of the reactants is B:V:S=1:2:2 and the reaction temperature is 120°C,the catalyst P（BVS-SO₃H）-SO₃CF₃ is added in an amount of 0.5wt%.Compared with the monoacid solid catalyst,the introduction of double-acid groups significantly increases the active acid sites that can be exposed in the reaction,and ultimately obtains better catalytic performance with a 100%conversion and 93.67%PXE yield.（3）The aminated UIO-66 was introduced in polymeric ionic liquids as a solid acid catalyst for the synthesis of metal-organic framework functionalized ionic liquids with structural functional groups.When the catalytic reaction temperature is 120°C,the catalyst UIO-66-PSD-SO₃CF₃ When the addition amount is 0.60 wt%,the catalyst can achieve the best conversion rate（100%）and PXE yield（94.83%）.Compared with single acid type and double acid type polymer ion catalysts,it has better catalytic performance and cycle performance.