Zr-SBA-15催化苯酚甲醛高选择性合成邻位异构体双酚F  

High selective synthesis of ortho isomer of bisphenol F catalyzed by Zr-SBA-15

作　　者：谈瑛[1] 李勇飞[1] 魏元峰 严家其 吴志民[1] 潘浪胜[1] 刘跃进[1] 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105

出　　处：《化工学报》2016年第5期1900-1906,共7页CIESC Journal

基　　金：国家自然科学基金项目(21276217)~~

摘　　要：以P123为模板剂,正硅酸乙酯为硅源,以硝酸氧锆为锆源,采用水热一步法合成了分子筛催化剂Zr-SBA-15,用XRD、BET、ICP、吡啶FT-IR、NH3-TPD进行了分析表征,考察了不同Si/Zr摩尔比Zr-SBA-15催化苯酚、甲醛合成双酚F的催化活性,发现当Si/Zr摩尔比为20时催化活性较好。以Si/Zr摩尔比20的Zr-SBA-15为催化剂,在反应温度90℃、酚醛摩尔比30:1、催化剂与甲醛质量比1:1条件下反应240 min,双酚F收率达到83.5%,邻位异构体双酚F选择性高达92.5%,同时还提出了Zr-SBA-15高选择性催化苯酚、甲醛合成邻位异构体双酚F的反应机理。A molecular sieve catalyst Zr-SBA-15 was synthesized by the hydrothermal one-step method using P123, TEOS and Zr ONO3·x H2 O as template agent, silicon and zirconium sources, respectively. The Zr-SBA-15 catalyst was characterized by XRD, BET, ICP, pyridine-FTIR and NH3-TPD, respectively, and used to mainly synthesize the ortho isomer of bisphenol F from phenol and formaldehyde. The results showed that the pore diameter of the prepared Zr-SBA-15 catalyst was about 6.6 nm and the distribution of pore diameter was uniform. After Zr incorporated into SBA-15, it had a high proportion of Lewis acid sites favouring the forming of the ortho isomer of bisphenol F with high catalytic activity. When the molar ratio of Si/Zr was 20, the Zr-SBA-15 catalyst exhibited the best catalytic activity with 83.5% of yield and 92.5% of ortho isomer of bisphenol F. The optimized reaction conditions were obtained as the phenol/formaldehyde molar ratio 30, the catalyst/formaldehyde mass ratio 1, reaction temperature 90℃ and reaction time 240 min. The reaction mechanism for high selective synthesis of the ortho isomer of bisphenol F was also proposed.

关 键 词：分子筛 催化剂 合成 邻位异构体双酚F 

分 类 号：TQ243.2[化学工程—有机化工] TQ426.91