本文選題：催化劑 + 聚合��； 參考：《化工進(jìn)展》2017年07期

【摘要】：通過(guò)自由基共聚,質(zhì)子化及離子交換兩步法合成聚咪唑基離子液體固體酸催化劑(PILs)。采用傅里葉紅外光譜(FTIR)、掃描電鏡(SEM)、透射電鏡(TEM)、X射線光電子能譜分析(XPS)、熱重分析(TGA)、元素分析和電位滴定的方法對(duì)該催化劑的結(jié)構(gòu)和性能進(jìn)行了表征。結(jié)果表明該催化劑具有層狀結(jié)構(gòu)、良好的熱穩(wěn)定性和較高的質(zhì)子酸濃度,并在不加入帶水劑的條件下,考察了該聚離子液體固體酸催化劑對(duì)甘油乙�；磻�(yīng)的催化作用。結(jié)果表明該P(yáng)ILs固體酸催化劑具有良好的選擇催化活性,在酸醇摩爾比為6∶1、催化劑用量4%(質(zhì)量分?jǐn)?shù))、120℃、4h的最優(yōu)條件下,甘油轉(zhuǎn)化率達(dá)98.2%,單乙酸甘油酯的選擇性為11.6%,二乙酸甘油酯和三乙酸甘油酯的總選擇性高達(dá)88.4%,優(yōu)于Amberlyst-15的催化效果。該催化劑易回收,具有良好的水熱穩(wěn)定性,且重復(fù)使用4次經(jīng)再生后仍能保持良好的選擇催化活性。
[Abstract]:Poly (imidazolyl) ionic liquid solid acid catalyst was synthesized by free radical copolymerization, protonation and ion exchange. The structure and properties of the catalyst were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), elemental analysis and potentiometric titration. The results showed that the catalyst had layered structure, good thermal stability and high concentration of proton acid. The catalytic effect of the solid acid catalyst of polyionic liquid on acetylation of glycerol was investigated without adding aqueous agent. The results show that the PILs solid acid catalyst has good selective catalytic activity. Under the optimum conditions, the molar ratio of acid to alcohol is 6: 1 and the amount of catalyst is 4 (120 鈩，

本文編號(hào)：1834346