本文選題：離子液體 + 催化劑�。� 參考：《化工進(jìn)展》2017年02期

【摘要】：首先以環(huán)氧氯丙烷為原料,通過開環(huán)聚合得聚環(huán)氧氯丙烷(PECH),再通過溴化和氨化等方法得到端氨基的聚環(huán)氧氯丙烷,再將其與N-甲基咪唑反應(yīng),制備氯化1-氨基聚醚-3-甲基咪唑離子液體([H_2N-PECH-MIM]Cl)催化劑,并利用紅外(IR)和核磁(NMR)對(duì)其化學(xué)結(jié)構(gòu)進(jìn)行表征,利用熱重分析儀(TGA)和凝膠滲透色譜儀(GPC)對(duì)其熱性能和分子量進(jìn)行了測(cè)試。然后用制備的高分子離子液體[H_2N-PECH-MIM]Cl催化環(huán)氧丙烷與二氧化碳合成碳酸丙烯酯,以純度、轉(zhuǎn)化率、選擇性和轉(zhuǎn)化頻率為考察指標(biāo),研究催化溫度、壓力、循環(huán)使用次數(shù)對(duì)催化性能的影響,并比較了其與溴化1-乙胺基-3-甲基咪唑離子液體[Ae MIM]Br的催化性能。結(jié)果表明,制備的高分子催化劑[H_2N-PECH-MIM]Cl結(jié)構(gòu)正確,產(chǎn)率為71%,其催化性能遠(yuǎn)遠(yuǎn)優(yōu)于小分子離子液體[Ae MIM]Br,可在不用助催化劑的溫和條件下即可高效完成催化過程,且循環(huán)使用10次基本不影響其催化活性。當(dāng)催化溫度為90℃,壓力為1.8MPa,用量為1.0%時(shí),純度為99.0%,轉(zhuǎn)化率為100%,選擇性高達(dá)96.9%,轉(zhuǎn)化頻率TOF為3848h~(-1)。
[Abstract]:Poly (epichlorohydrin) was synthesized by ring-opening polymerization of epichlorohydrin, then amino terminated polyepichlorohydrin was synthesized by bromination and ammoniation, and then reacted with N-methylimidazole. 1-aminopolyether 3-methyl imidazole chloride ionic liquid ([H_2N-PECH-MIM] Cl) catalyst was prepared. Its chemical structure was characterized by IR and NMR. The thermal properties and molecular weight of the catalyst were measured by thermogravimetric analyzer (TGA) and gel permeation chromatography (GPC). Propylene carbonate was synthesized from propylene oxide and carbon dioxide by using the prepared polymer ionic liquid [H_2N-PECH-MIM] Cl as catalyst. The catalytic temperature and pressure were studied with purity, conversion, selectivity and conversion frequency as the indexes. The effect of recycling times on the catalytic performance was compared with that of 1-ethylamino-3-methyl imidazole bromide ionic liquid [Ae MIM] Br. The results show that the structure of [H_2N-PECH-MIM] Cl is correct and the yield is 71%. The catalytic performance of the prepared polymer catalyst [H_2N-PECH-MIM] Cl is much better than that of small molecular ionic liquid [Ae MIM] Br. the catalytic process can be completed efficiently under mild conditions without co-catalyst. The catalytic activity was not affected by 10 cycles of recycling. When the catalytic temperature is 90 鈩，

本文編號(hào)：1794159