叔丁基甘油醚的催化合成研究

发布时间：2018-03-16 10:19

本文选题：异长叶烯酮磺酸　切入点：醚化反应　出处：《林业工程学报》2017年06期 　论文类型：期刊论文

【摘要】：甘油是一种可再生资源,作为柴油生产过程中的副产物,每年大量剩余,以甘油为原料制成的叔丁基甘油醚常用作燃料添加剂,可显著降低其黏度。为提高多取代叔丁基甘油醚的得率,以叔丁醇(TBA)和甘油(G)为原料,4A分子筛为脱水剂,经醚化反应液相体系下合成了叔丁基甘油醚,通过GC、GC-MS等方法对产物进行分析,探讨了催化剂种类及其用量、脱水剂用量、反应时间等因素对合成叔丁基甘油醚的影响,并确定了叔丁基甘油醚的合成工艺条件。结果表明:在异长叶烯酮磺酸的催化作用下,当催化剂用量为0.17 g/g,脱水剂用量为0.8 g/g,投料比n(G)∶n(TBA)为1.0∶4.5,反应时间12 h时,甘油转化率为79.87%,其中,多取代叔丁基甘油醚的得率为71.74%。该方法操作简单,催化剂绿色环保,可显著提高多取代叔丁基甘油醚的得率。
[Abstract]:Glycerol is a kind of renewable resource. As a by-product of diesel oil production, it is surplus every year. Tert-#china_person0# glycerol ether, which is made from glycerin, is often used as fuel additive. In order to increase the yield of tert-substituted tert-#china_person0# glycerol ether, tert-butyl alcohol (TBA) and glycerol (G) were used as raw materials for dehydration, and tert-#china_person1# glycerol ether was synthesized by etherification in liquid phase system. The product was analyzed by GC / MS. The effects of catalyst type and dosage, dehydrating agent dosage and reaction time on the synthesis of tert-#china_person0# glycerol ether were discussed. The synthetic conditions of tert-#china_person0# glycerol ether were determined. The results showed that under the catalysis of isopenone sulfonic acid, when the amount of catalyst was 0.17 g / g, the dosage of dehydrating agent was 0.8 g / g, the feed ratio was 1.0: 4.5, the reaction time was 12 h. The yield of polysubstituted tert-#china_person0# glycerol ether is 71.74. The method is simple, the catalyst is green, and the yield of polysubstituted uncle Ding Ji glycerol ether can be improved significantly.
【作者单位】：江苏省生物质绿色燃料与化学品重点实验室江苏省林业资源高效加工利用协同创新中心南京林业大学化学工程学院;
【基金】：“十三五”国家重点研发计划林业资源培育及高效利用技术创新重点专项(2016YFD0600804) 江苏省高校自然科学研究重大项目(14KJ220001) 国家自然科学基金(31470529)
【分类号】：TE624.81

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