Preparation of δ-Valerolactone and Its Spectral Analysis
FENG Shi-hong1, JIA Tai-xuan2, ZHANG Zhen-bin1, GAO Jie1, LIN Yan1, LIU Zi-li3
1. College of Chemistry & Environmental Engineering, Liaoning University of Technology, Jinzhou 121004, China 2. College of Chemistry & Environmental Engineering, Anyang Institute of Technology, Anyang 455000, China 3. College of Chemistry & Chemical Engineering, Guangzhou University, Guangzhou 510006, China
Abstract：In the study, CuO/ZnO/Al2O3 was prepared by sol-gel method. Its catalytic activity was evaluated by gas-phase catalytic dehydrogenation of 1,5-Pentanediol to δ-valerolactone as a probe reaction. CuO/ZnO/Al2O3 and long period reactive CuO/ZnO/Al2O3 were detected by XRD. Micro-structure and essence disciplinarian of CuO/ZnO/Al2O3 were disclosed. Metal ions had a cooperative effects during the catalytic dehydrogenation of 1,5-pentanediol to δ-valerolactone. After CuO/ZnO/Al2O3 deactivation, crystal particle size was increased clearly. It were found that characteristic diffraction peaks were caused by the catalyst temperature raising in methanol catalytic synthesis of ZnO. 1,5-Pentanediol and δ-valerolactone were detected by FTIR. Their internal chemical bond and molecular structure were disclosed. The purity of δ-valerolactone product was very high. δ-Valerolactone and its polymer were detected by DSC. δ-Valerolactone possessed with poor stability. Polymerization reaction was easily happened by itself. So it was worth focusing on how to improve the stability of the δ-valerolactone monomer. This study could provide basic data and experimental basis for gas-phase catalytic dehydrogenation of 1,5-Pentanediol to δ-valerolactone in pilot and industrial scale up research.
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