Synthesis Of Ionic Liquids And Its Application In Catalytic Reaction And Separation Of CO₂

Ionic liquids are compounds that are completely composed of ions and are liquid at or close to room temperature. With the continuous efforts of some chemists, ionic liquids have not only become increasingly popular as reaction and extraction media in research and development, they have also widely been promoted as "green solvents", which are regarded as powerful alternatives to the volatile organic compounds in the field of organic synthesis. Recently, a large number of task-specific ionic liquids (TSTLs) have emerged. As their special functional group in the cation or anion of the ionic liquids, TSTLs not only behave as a reaction medium but also as a reagent or catalyst in some reactions or processes.This dissertation can be divided into two parts. One is the synthesis of ionic liquids and their applications in catalysis of organic reactions. The other is the syntheses of amino-functionalized ionic liquid and its application in separation of CO2. The full text consists of five chapters.Chapter I briefly describes the development of ionic liquids and their characteristics as organic solvents or catalyst for organic reactions. Fortheremore, a detailed review of the application of ionic liquids is described from two aspects. One is the ionic liquids as organic reaction solvent or catalyst used in catalytic reaction. Another is the application of ionic liquids in separation of CO2.The main content of chapter II is the synthesis of ionic liquids and their characterizations. Including:synthesized a sieres of novel amino-functionalized Ionic Liquids, and tested ids liquid range and thermal stability by DSC and TG research; A series of neutral-ionic liquids based on pyridine and imidazole are synthesized and characterized, and their solubility in organic solvents are also researched; Synthesized some Brensted ionic liquids based on neutralization of n-methyl pyrrolidone with different acids.Chapter III focused on the capture of CO2by amino-functionalized Ionic Liquids [AEMP][AA]. First of all, researched the absorption capacity of [AEMP][Gly] dissolved in solution or supported on silica; Secondly, studied the absorption capacity of [AEMP][Gly] supported on different types of silicas through the BET adsorption instrument; Finally, studied the other species of [AEMP][AA]’s absorption capacity and recycling properties of [AEMP][Gly], and discussed the absorption mechanism of this absorption progress by13C NMR and IR spectra.Chapter IV studied on the acetalization of aromatic aldehydes with glycol using neutral ionic liquids as catalyst. First of all, compared the catalytic effect of neutral ionic liquids on different anions, cations and chain length; Secondly, studied [C12-Py][BF4] and [C12-Py][PF6] catalytic efficiency for the acetalization of different aromatic aldehyde with ethylene glycol, and more, researched the cycling of [C12-Py][PF6]; Finally, proposed a brief description on the possible mechanism of the acetal reaction catalyzed by neutral ionic liquids.Chapter V reasearched on the transesterification of the Jatropha Curcas oil with methanol to prepare biodiesel by using N-methyl pyrrolidone class Bronsted ionic liquids as catalyst. Firstly, established a method for qualitative and quantitative analysis of fatty acid methyl esters in biodiesel by’H NMR calibration curve; Secondly, optimized the best catalytic conditions of the reaction catalyzed by [HNMP][CH3SO3] using orthogonal experiment, and also investigated the influence of adding solvent THF or methyl ethyl ketone in the reaction catalyzed by [HNMP][CH3SO3], and more studied the recycling of [HNMP][CH3SO3]. At last, investigated the catalyzed effect in this reaction by different Bronsted ionic liquids based on classes of n-methyl pyrrolidone.