Highly stable, active and recyclable solid acid catalyst based on polymer-coated magnetic composite particles
Highly stable, active and recyclable solid acid catalyst based on polymer-coated magnetic composite particles
复制标题
基于聚合物涂层磁性复合颗粒的高稳定、活性和可回收的固体酸催化剂
DOI：
10.1016/j.cclet.2019.05.034
复制
发表时间：
2019-12
影响因子：
9.1
通讯作者：
Changchun Wang
中科院分区：
文献类型：
--
作者：
Jianxin Luo;Xucheng Zhang;Chunyan Zhang;Tao Wang;Xue Chen;Hongyu Chen;Steve King;Changchun Wang
采用回流沉淀聚合（RPP）在 Fe3O4 磁性簇表面涂覆交联聚苯乙烯（PS）壳的简便方法。用氯磺酸处理 PS 壳可产生具有酸功能的磁性复合颗粒。通过调节单体（苯乙烯和二乙烯基苯）的用量和比例，所得磁性复合颗粒固体酸（MPM-5S）的饱和磁化强度值为18emu/g，比表面积为243m2/g，酸密度为2.113mmol/g。对MPM-5S磁性固体酸催化剂进行油酸与甲醇酯化制备生物柴油的评价。在温和条件下，油酸转化率达到91%，远高于Amberlyst-15的催化活性，接近浓H2SO4的催化活性。固体酸催化剂可通过磁分离回收并重复使用3次，保持其初始催化活性95%以上。另外，固体酸可用于催化果糖脱水生成5-羟甲基糠醛。
A facile approach has been adopted for coating cross-linked polystyrene (PS) shells on the surface of Fe3O4magnetic clusters using reflux-precipitation polymerization (RPP). Treating the PS shell with chlorosulfonic acid yields magnetic composite particles with acid functionality. By adjusting the amount and proportion of monomers (styrene and divinylbenzene), the obtained magnetic composite particle solid acid (MPM-5S) exhibits a saturation magnetization value of 18 emu/g, a specific surface area of 243 m2/g and an acid density of 2.113 mmol/g. The MPM-5S magnetic solid acid catalyst was evaluated for esterification of oleic acid with methanol to prepare biodiesel. Under mild conditions, the conversion of oleic acid reached 91%, which was much higher than the catalytic activity of Amberlyst-15 and close to the catalytic activity of concentrated H2SO4. The solid acid catalyst can be recovered by magnetic separation and reused three times maintaining over 95% of its initial catalytic activity. Additionally, the solid acid can be used to catalyze the dehydration of fructose to 5-hydroxymethylfurfural.
登录
查看更多内容
区域选择性控制合成胶体蘑菇纳米结构及其空心衍生物
影响因子：
15
作者：
Feyen, Mathias;Weidenthaler, Claudia;Lu, An-Hui
通讯作者：
Lu, An-Hui
影响因子：
9.8
作者：
Zillillah;G. Tan;Zhi Li
通讯作者：
Zillillah;G. Tan;Zhi Li
影响因子：
6.1
作者：
Ma, Huan;Li, Jiabao;Zhu, Suwen
通讯作者：
Zhu, Suwen
影响因子：
3.7
作者：
Hongwang Wang;J. Covarrubias;Heidy Prock;Xiaorong Wu;Donghai Wang;S. Bossmann
通讯作者：
Hongwang Wang;J. Covarrubias;Heidy Prock;Xiaorong Wu;Donghai Wang;S. Bossmann
影响因子：
9.5
作者：
Y. Zhang;Yongkun Yang;Wanfu Ma;Jia Guo;Yao Lin;Changchun Wang
通讯作者：
Y. Zhang;Yongkun Yang;Wanfu Ma;Jia Guo;Yao Lin;Changchun Wang