CAJ | 학술논문

研究了几种磺酸功能化离子液体催化纤维素在生物丁醇中转化为乙酰丙酸丁酯的性能.系统考察了催化剂的酸强度，用量，反应温度，时间和溶剂对纤维素转化效率和产物分布规律的影响.实验结果表明酸度最强的磺酸功能化离子液体1-(4-磺酸丁基)-3-甲基咪唑硫酸氢盐([C4H8SO3Hmim]HSO4)能够有效地催化纤维素转化为乙酰丙酸丁酯，且在优化的反应条件下纤维素的转化率高达98.4%，乙酰丙酸丁酯的产率为31.1%，同时共生产物甲酸丁酯、水溶性产物和生物油的产率分别为33.4%、20.6%和23.8%.该催化体系具有一定的耐水性能，水的添加量为0.2 mL时并不会严重影响纤维素的转化率.此外，酸性离子液体催化剂还表现出了良好的重复使用性能，使用六次后仍然保持较高的活性.
연구료궤충광산공능화리자액체최화섬유소재생물정순중전화위을선병산정지적성능.계통고찰료최화제적산강도，용량，반응온도，시간화용제대섬유소전화효솔화산물분포규률적영향.실험결과표명산도최강적광산공능화리자액체1-(4-광산정기)-3-갑기미서류산경염([C4H8SO3Hmim]HSO4)능구유효지최화섬유소전화위을선병산정지，차재우화적반응조건하섬유소적전화솔고체98.4%，을선병산정지적산솔위31.1%，동시공생산물갑산정지、수용성산물화생물유적산솔분별위33.4%、20.6%화23.8%.해최화체계구유일정적내수성능，수적첨가량위0.2 mL시병불회엄중영향섬유소적전화솔.차외，산성리자액체최화제환표현출료량호적중복사용성능，사용륙차후잉연보지교고적활성.
Butyl levulinate (BL) is one of the most important biochemicals derived from cel ulose, and it is of particular interest in industrial applications. Efficient synthesis of BL from cel ulose in bio-butanol (bio-BuOH) medium has been investigated in the presence of acidic SO3H-functionalized ionic liquid (SFIL) catalysts. The results showed that the acid strength of the SFILs, catalyst dosage, reaction temperature, reaction time, and solvent composition significantly affected the conversion of cel ulose and the yield of the target products. Using the strongest acidic SFIL 1-(4-sulfobutyl)-3-methylimidazolium hydrosulfate ([C4H8SO3Hmim]HSO4) as the catalyst, 98.4%of cel ulose could be converted into 31.1%of BL accompanied with 33.4%, 20.6%, and 23.8%of butyl formate (BF), water soluble products (WSPs), and biofuel (Biof), respectively, under the optimized conditions. This catalytic system was water-tolerant, and the addition of 0.2 mL water did not significantly decrease its ability for conversion of cel ulose. Furthermore, this acidic SFIL catalyst could be recycled up to six consecutive times without loss of catalytic activity.