CN103204836A - 一种制备5-羟甲基糠醛的方法 - Google Patents
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Abstract
Description
技术领域
背景技术
5-羟甲基糠醛(HMF)是一种重要的新型平台化合物,可通过加氢、脱氢、酯化、卤化、聚合和水解等反应制备出数百种化学品,并被广泛应用于医药、树脂类塑料、柴油燃料添加物等方面。淀粉、纤维素等生物质水解可生成葡萄糖和果糖等生物质糖,再经过脱水能够制备出HMF。制备HMF常用的催化剂有酸、固体酸、离子交换树脂等。传统酸催化具有副反应多、产品收率偏低、产物分离操作复杂、腐蚀设备和环境污染大等问题;固体超强酸等多相催化剂的制备成本高、易中毒并结焦失活等缺陷;离子交换树脂类催化剂存在分离时易流失、制备重现性差以及传质和扩散阻力大等问题,限制了它们在HMF制备过程中的应用。
发明内容
本发明涉及一种制备HMF的方法,即一种采用双酸型离子液体催化生物质糖制备HMF的方法,其特征在于采用烷基磺酸功能化的酸性咪唑盐阳离子与Lewis酸性的无机阴离子构成的双酸型离子液体为催化剂,利用两者间的酸强度可调变特性和具有协同催化效应,达到提高HMF产率的目的。反应条件为:水与有机溶剂体积比为1∶5~1∶20,催化剂离子液体、生物质糖(果糖、葡萄糖、蔗糖)质量比为1∶2~1∶10,反应温度160℃~220℃,反应时间5min~60min的条件下,制备HMF。
本发明所使用制备HMF所诉的反应条件以蔗糖、葡萄糖和果糖等生物质糖为反应物,催化剂离子液体占反应物的质量20%~50%,反应温度180℃~200℃,反应时间5min~30min为佳。
本发明通过以下技术方案解决这一技术问题:
典型反应过程是以双酸型离子液体1-(3-磺酸)-丙基-3-甲基咪唑氯铬酸盐(酸化内盐与氯化铬摩尔比1∶2)为催化剂,将催化剂离子液体和生物质糖(果糖、葡萄糖、蔗糖)按质量比1∶2~1∶10,投入配有搅拌器、温度计的高压反应釜中,加热搅拌反应,水与有机溶剂体积比为1∶5~1∶20,反应温度160℃~220℃,反应时间5min~60min。反应后取出混合物采用紫外分光光度计测定所得产物中HMF质量分数,并计算收率。分离出离子液体循环使用,用于循环催化生物质糖制备HMF。离子液体重复使用时,其催化制备HMF的催化活性未见明显下降。
本发明相对于传统催化剂,具有独特优点:
1.催化剂具有独特催化特性,且催化性能稳定、易分离、可重复使用。
2.工艺简单、三废排放量少。
3.原料生物质糖选择范围宽,可使用廉价的蔗糖等生物质糖作为反应物生产高附加值的产品。
具体实施方法
下面结合实施例对本发明的方法做进一步说明,并不是对本发明的限定。
实施例1:将2g蔗糖,20mL二甲基亚砜,2mL水和0.4g离子液体1-(3-磺酸)-丙基-3-甲基咪唑氯铬酸盐(酸化内盐与氯化铬摩尔比1∶2),加入到高压反应釜中,加热搅拌,180℃下反应30min。采用紫外分光光度计测定所得产物中5-羟甲基糠醛质量分数,算得HMF的收率为84.7%。
对比实施例1:将2g蔗糖,20mL二甲基亚砜,2mL水和0.4gHCl,加入到高压反应釜中,加热搅拌,180℃下反应30min。采用紫外分光光度计测得所得产物中5-羟甲基糠醛质量分数,算得HMF的收率为51.3%
实施例2:将2g葡萄糖,15mL正丁醇,1mL水和0.7g离子液体1-(3-磺酸)-丁基-3-乙基咪唑氯铁酸盐(酸化内盐与氯化铁摩尔比1∶2),加入到高压反应釜中,加热搅拌,200℃下反应15min。采用分光光度计测得所得产物中5-羟甲基糠醛质量分数,算得HMF的收率为48.5%。
对比实施例2:将将2g葡萄糖,15mL正丁醇,1mL水和0.7gHCl,加入到高压反应釜中,加热搅拌,180℃下反应15min。采用分光光度计测得所得产物中5-羟甲基糠醛质量分数,算得HMF的收率为23.9%。
实施例3:将2g蔗糖,10mL二甲基亚砜,2mL水和0.2g离子液体1-(3-磺酸)-丙基-3-丙基咪唑氯锌酸盐(酸化内盐与氯化锌摩尔比1∶2),加入到高压反应釜中,加热搅拌,160℃下反应60min。采用紫外分光光度计测定所得产物中5-羟甲基糠醛质量分数,算得HMF的收率为65.3%。
实施例4:将2g蔗糖,25mL二甲基亚砜,2mL水和1.2g离子液体1-(3-磺酸)-丁基-3-甲基咪唑氯铜酸盐(酸化内盐与氯化铜摩尔比1∶2),加入到高压反应釜中,加热搅拌,200℃下反应5min。采用紫外分光光度计测定所得产物中5-羟甲基糠醛质量分数,算得HMF的收率为75.8%。
实施例5:将2g果糖,15mL二甲基亚砜,2mL水和1.2g离子液体1-(3-磺酸)-丁基-3-丙基咪唑氯钴酸盐(酸化内盐与氯化钴摩尔比1∶2),加入到高压反应釜中,加热搅拌,220℃下反应10min。采用紫外分光光度计测定所得产物中5-羟甲基糠醛质量分数,算得HMF的收率为71.2%。
实施例6:将2g葡萄糖,20mL正丁醇,1mL水和1.0g离子液体1-(3-磺酸)-丙基-3-乙基咪唑氯铬酸盐(酸化内盐与氯化铬摩尔比1∶2),加入到高压反应釜中,加热搅拌,180℃下反应40min。采用紫外分光光度计测定所得产物中5-羟甲基糠醛质量分数,算得HMF的收率为47.5%。
实施例7:将2g果糖,20mL正丁醇,1mL水和1.0g离子液体1-(3-磺酸)-丁基-3-甲基咪唑氯铬酸盐(酸化内盐与氯化铬摩尔比1∶2),加入到高压反应釜中,加热搅拌,160℃下反应60min。采用紫外分光光度计测定所得产物中5-羟甲基糠醛质量分数,算得HMF的收率为50.7%。
实施例8:将2g蔗糖,10mL二甲基亚砜,1mL水和1.0g离子液体1-(3-磺酸)-丙基-3-乙基咪唑氯镍酸盐(酸化内盐与氯化镍摩尔比1∶2),加入到高压反应釜中,加热搅拌,180℃下反应40min。采用紫外分光光度计测定所得产物中5-羟甲基糠醛质量分数,算得HMF的收率为67.1%。
实施例9:将2g蔗糖,20mL正丁醇,2mL水和0.6g回收的离子液体1-(3-磺酸)-丙基-3-甲基咪唑氯锰酸盐(酸化内盐与氯化锰摩尔比1∶2),加入到高压反应釜中,加热搅拌,200℃下反应50min。采用紫外分光光度计测定所得产物中5-羟甲基糠醛质量分数,算得HMF醛的收率为68.9%。
Claims (3)
3.如权利要求1所述的方法,其特征在于制备HMF所诉的反应条件以蔗糖、葡萄糖和果糖等生物质糖为反应物,催化剂离子液体占反应物的质量20%~50%,反应温度180℃~200℃,反应时间5min~30min为佳。
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Cited By (7)
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CN103641802A (zh) * | 2013-11-14 | 2014-03-19 | 华南理工大学 | 一种一步法多相体系制备5-溴甲基糠醛的方法 |
CN105997983A (zh) * | 2016-06-20 | 2016-10-12 | 贵州省生物技术研究开发基地 | 5-羟甲基糠醛在制备抗幽门螺杆菌药物中的应用 |
CN108440462A (zh) * | 2018-04-12 | 2018-08-24 | 厦门大学 | 一种在无酸体系下由果糖制备5-羟甲基糠醛的方法 |
CN112898245A (zh) * | 2021-01-19 | 2021-06-04 | 浙江恒澜科技有限公司 | 合成5-羟甲基糠醛的方法 |
CN114805254A (zh) * | 2022-04-11 | 2022-07-29 | 合肥利夫生物科技有限公司 | 一种5-羟甲基糠醛的制备方法 |
CN114805256A (zh) * | 2022-05-17 | 2022-07-29 | 广东石油化工学院 | 两性离子内盐催化果糖基碳水化合物脱水制备5-羟甲基糠醛的方法 |
CN115707694A (zh) * | 2021-08-18 | 2023-02-21 | 中国石油化工股份有限公司 | 一种糠醛的制备方法 |
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