摘要
采用乙二胺对磺酸型阳离子交换树脂进行胺化改性,并运用CHNS元素分析及傅里叶变换红外光谱(FTIR)对改性树脂进行表征。结果表明:胺化改性后树脂含氮量为0.94 mmol/g,改性后树脂骨架结构变化不大,胺基成功固载到树脂上,碱性增强,使氢型树脂成为具有酸碱双功能的催化剂。以胺化改性树脂为催化剂催化环己酮缩合反应,在较温和的反应条件下,环己酮转化率可达62.1%,二聚物选择性可达98.0%,体现出明显的酸碱协同催化作用。胺化量为5%时改性树脂效果最佳且改性树脂重复使用5次后,催化性能仍较稳定。
Modified sulfonie acid ion exchange resins were prepared by ethylenediamine. The prepared catalyst was characterized by Fourier transfer infrared spectroscopy （FT-IR） and the CHNS elemental a- nalysis was performed on an elemental analyzer Vario EL cube. Results showed that 0.94 mmol/g nitro- gen-containing resins were obtained modified by amination. Moreover, the skeleton structure of the modi- fied resin had no change. The basicity of catalyst could be strengthened by supporting amino. The acid- base bifunctional resin catalyst was obtained. The self-condensation of cyclohexanone reactions was carried out over modified resin. The conversion of cyclohexanone and selectivity to dimer-eyclohexanone were 62. 1% and 98.0%, respectively, exhibiting the acid-base coordination obviously. The reaction conditions were mild. The amination rate 5% of resins revealed good catalytic performances to self-condensation of eyclohexanone. Furthermore, the modified resin showed a good repeatability after 5 times reuse.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2013年第6期39-42,共4页
Journal of Nanjing Tech University(Natural Science Edition)
基金
材料化学工程国家重点实验室开放课题基金
国家重点基础研究发展计划(973计划)(2009CB724701)
关键词
离子交换树脂
胺化
酸碱双功能
环己酮
缩合
ion exchange resin
amination
acid-base bifunctional
cyclohexanone
self-condensation
