CN114736401A - 一种离子液体溶解淀粉的应用方法 - Google Patents
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Abstract
一种离子液体溶解淀粉的应用方法,将离子液体投入反应器中,将反应器放在油浴中,加入10‑15%的淀粉,开启搅拌和温控机构,待淀粉溶解至透明状时,加入单体,在此温度下反应3‑5小时,加入乙醇,继续搅拌20‑40分钟,把反应产物移入砂芯漏斗中,在‑0.95MPa的压力下过滤,用乙醇洗涤2次,把过滤后的产品烘干研磨后得到淀粉衍生物,滤液转入旋转蒸发器中,在温度为50℃,‑0.95MPa压力的条件下分离出离子液体和乙醇;本发明利用溶剂把淀粉充分溶解,离子液体和乙醇能够重复利用,极大的降低了生产成,利用此法生产的淀粉衍生物具有灵活多样性,可以制得酯化淀粉、醚化淀粉、接枝淀粉,且性能远高于传统方法所制得的淀粉衍生物性能。
Description
技术领域
本发明涉及淀粉衍生物制造技术领域,尤其涉及一种离子液体溶解淀粉的应用方法。
背景技术
目前淀粉衍生物制造方法有两种,一是湿法,在40%的淀粉水乳液中进行各种氧化、酯化、醚化等反应,经过滤洗涤烘干得产品。该方法制得产品取代度不高,产品性能和应用受到限制,且生产过程产生大量废水,废水治理成本较大;二是干法,把淀粉与所需反应原料混合,在带搅拌的反应器中加热反应制得产品,此法生产工艺虽然简单,但存在很多问题。一是产品中带有反应产生的副产物,影响产品性能;二是反应不均匀;三是生产设备不能适应规模化生产要求,固体搅拌设备只能小容量搅拌;四是生产过程传热很慢温度不易控制。无论湿法还是干法都是在淀粉颗粒表面进行的反应,因此产品性能都难得到大幅提升。
鉴于上述原因,现研发出一种离子液体溶解淀粉的应用方法。
发明内容
本发明的目的是为了克服现有技术中的不足,提供一种离子液体溶解淀粉的应用方法,利用溶剂把淀粉充分溶解,离子液体和乙醇能够重复利用,极大的降低了生产成,利用此法生产的淀粉衍生物具有灵活多样性,可以制得酯化淀粉、醚化淀粉、接枝淀粉,且性能远高于传统方法所制得的淀粉衍生物性能。
本发明为了实现上述目的,采用如下技术方案:一种离子液体溶解淀粉的应用方法,将离子液体投入反应器中,将反应器放在油浴中,油浴温度为80-100℃,加入10-15%的淀粉,开启搅拌和温控机构,待淀粉溶解至透明状时,加入单体,在此温度下反应3-5小时,然后降温至20-40℃,加入乙醇,继续搅拌20-40分钟,把反应产物移入砂芯漏斗中,开启真空泵,在-0.95MPa的压力下过滤,用乙醇洗涤2次,把过滤后的产品烘干研磨后得到淀粉衍生物,滤液转入旋转蒸发器中,在温度为50℃,-0.95MPa压力的条件下分离出离子液体和乙醇,分离后的离子液体和乙醇能够重复循环使用。
所述的离子液体的阳离子为咪唑类,阴离子为CL、磷酸酯、F其中的一种。
所述的淀粉为玉米淀粉、马铃薯淀粉、木薯淀粉、小麦淀粉、糯米淀粉、橡子淀粉其中的一种。
所述的单体为乙酸酐、丙酸酐、马来酸酐、乙酸乙烯酯、丙烯酸、丙烯酰胺、丙烯酸酯、苯乙烯其中的一种或任两种组合。
本发明的有益效果是:本发明利用溶剂把淀粉充分溶解,淀粉中的葡萄糖长链以分子形态存在于溶剂中,所需反应物可以和淀粉分子充分接触,因此反应产物性能可任意控制且稳定,离子液体和乙醇能够重复利用,极大的降低了生产成,利用此法生产的淀粉衍生物具有灵活多样性,可以制得酯化淀粉、醚化淀粉、接枝淀粉,且性能远高于传统方法所制得的淀粉衍生物性能。
具体实施方式
下面结合实施例与具体实施方式对本发明作进一步详细说明:
实施列1
将100克的BMIMCL离子液体投入反应器中,将反应器放在油浴中,油浴温度为80℃,加入15克的玉米淀粉,开启搅拌和温控机构,待玉米淀粉溶解至透明状时,滴加5克的乙酸酐,在此温度下反应4小时,然后降温至30℃,加入200克的乙醇,继续搅拌30分钟,把反应产物移入砂芯漏斗中,开启真空泵,在-0.95MPa的压力下过滤,用乙醇洗涤2次,把过滤后的产品烘干研磨后得到乙酸酯化淀粉,滤液转入旋转蒸发器中,在温度为50℃,-0.95MPa压力的条件下分离出离子液体和乙醇,分离后的离子液体和乙醇能够重复循环使用。
实施例2
将100克的BMIMCL离子液体投入反应器中,将反应器放在油浴中,油浴温度为80℃,加入15克的马铃薯淀粉,开启搅拌和温控机构,待玉米淀粉溶解至透明状时,滴加5克的丙酸酐,在此温度下反应4小时,然后降温至30℃,加入200克的乙醇,继续搅拌30分钟,把反应产物移入砂芯漏斗中,开启真空泵,在-0.95MPa的压力下过滤,用乙醇洗涤2次,把过滤后的产品烘干研磨后得到丙酸酯化淀粉,滤液转入旋转蒸发器中,在温度为50℃,-0.95MPa压力的条件下分离出离子液体和乙醇,分离后的离子液体和乙醇能够重复循环使用。
实施例3
将100克的BMIMCL离子液体投入反应器中,将反应器放在油浴中,油浴温度为80℃,加入15克的小麦淀粉,开启搅拌和温控机构,待玉米淀粉溶解至透明状时,滴加5克的乙酸乙烯酯,在此温度下反应4小时,然后降温至30℃,加入200克的乙醇,继续搅拌30分钟,把反应产物移入砂芯漏斗中,开启真空泵,在-0.95MPa的压力下过滤,用乙醇洗涤2次,把过滤后的产品烘干研磨后得到乙酸酯化淀粉,滤液转入旋转蒸发器中,在温度为50℃,-0.95MPa压力的条件下分离出离子液体和乙醇,分离后的离子液体和乙醇能够重复循环使用。
实施例4
将100克的BMIMCL离子液体投入反应器中,将反应器放在油浴中,油浴温度为80℃,加入15克的木薯淀粉,开启搅拌和温控机构,待玉米淀粉溶解至透明状时,滴加5克的丙烯酸和2克的丙烯酰胺及0.2克的引发剂,在此温度下反应4小时,然后降温至30℃,加入200克的乙醇,继续搅拌30分钟,把反应产物移入砂芯漏斗中,开启真空泵,在-0.95MPa的压力下过滤,用乙醇洗涤2次,把过滤后的产品烘干研磨后得到接枝淀粉,滤液转入旋转蒸发器中,在温度为50℃,-0.95MPa压力的条件下分离出离子液体和乙醇,分离后的离子液体和乙醇能够重复循环使用。
实施例5
将100克的BMIMCL离子液体投入反应器中,将反应器放在油浴中,油浴温度为80℃,加入15克的糯米淀粉,开启搅拌和温控机构,待玉米淀粉溶解至透明状时,滴加5克的马来酸酐,在此温度下反应4小时,然后降温至30℃,加入200克的乙醇,继续搅拌30分钟,把反应产物移入砂芯漏斗中,开启真空泵,在-0.95MPa的压力下过滤,用乙醇洗涤2次,把过滤后的产品烘干研磨后得到马来酸酯化淀粉,滤液转入旋转蒸发器中,在温度为50℃,-0.95MPa压力的条件下分离出离子液体和乙醇,分离后的离子液体和乙醇能够重复循环使用。
实施例6
将100克的BMIMCL离子液体投入反应器中,将反应器放在油浴中,油浴温度为80℃,加入15克的橡子淀粉,开启搅拌和温控机构,待玉米淀粉溶解至透明状时,滴加5克的苯乙烯及0.2克的引发剂,在此温度下反应4小时,然后降温至30℃,加入200克的乙醇,继续搅拌30分钟,把反应产物移入砂芯漏斗中,开启真空泵,在-0.95MPa的压力下过滤,用乙醇洗涤2次,把过滤后的产品烘干研磨后得到苯乙烯接枝淀粉,滤液转入旋转蒸发器中,在温度为50℃,-0.95MPa压力的条件下分离出离子液体和乙醇,分离后的离子液体和乙醇能够重复循环使用。
Claims (4)
1.一种离子液体溶解淀粉的应用方法,其特征在于:将离子液体投入反应器中,将反应器放在油浴中,油浴温度为80-100℃,加入10-15%的淀粉,开启搅拌和温控机构,待淀粉溶解至透明状时,加入单体,在此温度下反应3-5小时,然后降温至20-40℃,加入乙醇,继续搅拌20-40分钟,把反应产物移入砂芯漏斗中,开启真空泵,在-0.95MPa的压力下过滤,用乙醇洗涤2次,把过滤后的产品烘干研磨后得到淀粉衍生物,滤液转入旋转蒸发器中,在温度为50℃,-0.95MPa压力的条件下分离出离子液体和乙醇,分离后的离子液体和乙醇能够重复循环使用。
2.根据权利要求1所述的一种离子液体溶解淀粉的应用方法,其特征在于:所述的离子液体的阳离子为咪唑类,阴离子为CL、磷酸酯、F其中的一种。
3.根据权利要求1所述的一种离子液体溶解淀粉的应用方法,其特征在于:所述的淀粉为玉米淀粉、马铃薯淀粉、木薯淀粉、小麦淀粉、糯米淀粉、橡子淀粉其中的一种。
4.根据权利要求1所述的一种离子液体溶解淀粉的应用方法,其特征在于:所述的单体为乙酸酐、丙酸酐、马来酸酐、乙酸乙烯酯、丙烯酸、丙烯酰胺、丙烯酸酯、苯乙烯其中的一种或任两种组合。
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