SBA-15固载磷钨酸催化剂的制备及催化合成叔丁基苯酚  

Preparation of SBA-15 supported tungstophosphoric acid catalysts and catalytic synthesis of tert-butyl phenol

作　　者：吴克 小梅 王斌[1] 董哲[1] 包英 王志强 刘宗瑞[1] Wu Ke;Xiao Mei;Wang Bin;Dong Zhe;Bao Ying;Wang Zhiqiang;Liu Zongrui(College of Chemistry and Chemical Engineering,Inner Mongolia University for the Nationalities,Inner Mongolia Autonomous Region Tongliao 028043,China)

机构地区：[1]内蒙古民族大学化学化工学院,内蒙古通辽028043

出　　处：《工业催化》2020年第6期68-74,共7页Industrial Catalysis

基　　金：国家自然科学基金资助项目(21661026);内蒙古自治区自然科学基金资助项目(2019MS02002);内蒙古自治区高等学校“青年科技英才支持计划”(NJYT-18-B22);内蒙古民族大学研究生科研创新资助项目(NMDSS1869);内蒙古民族大学科学研究基金资助项目(NMDYB19051)。

摘　　要：以不同硅烷偶联剂改性的介孔分子筛SBA-15为载体、PW12为催化剂,通过对SBA-15表面共价及非共价修饰制备磷钨酸@介孔分子筛/硅烷偶联剂复合催化剂PW12@SBA-15/YSiX3(YSiX3=Apts、Atapts、Papts);并利用FT-IR、XRD、TEM、N2吸附-脱附对其组成、结构及形貌进行表征。以改性SBA-15分子筛固载磷钨酸催化剂催化合成叔丁基苯酚为研究对象,考察不同硅烷偶联剂、反应温度、苯酚与叔丁醇物质的量比对催化合成叔丁基苯酚的影响,并获得合成叔丁基苯酚的最佳工艺条件,即反应温度145℃、n(苯酚)∶n(叔丁醇)=1∶2.5、重时空速2.2 h^-1,该最佳反应条件下,PW12@SBA-15/Apts催化剂催化合成叔丁基苯酚的催化活性最高,苯酚转化率为98.3%,2,4-二叔丁基苯酚选择性为57.3%.The phosphotungstic acid@ mesoporous molecular sieve/silane coupling agent composite catalysts PW12@SBA-15/YSiX3(YSiX3= Apts,Atapts,Papts) were prepared by covalent and non-covalent modification of SBA-15 surface,when the mesoporous molecular sieves SBA-15 modified by different silane coupling agents were used as the carrier and PW12 as the catalyst. And the composition,structure and morphology of the composite catalysts were characterized by FT-IR,XRD,TEM and N2 adsorptiondesorption. The synthesis of tert-butyl phenol catalyzed by modified SBA-15 zeolite supported phosphotungstic acid catalyst was studied. The effects of different silane coupling agents,reaction temperature,molar ratio of phenol to tert-butyl alcohol on the catalytic synthesis of tert-butyl phenol were investigated. The optimum technological process conditions for synthesizing tert-butyl phenol were obtained,which were reaction temperature 145 ℃,n( phenol) ∶ n( tert-butanol) = 1∶2.5,WHSV = 2.2 h^-1. Under the optimum reaction conditions,PW12@SBA-15/apts had the best avtivity for the synthesis of tert-butyl phenol,the conversion of phenol was 98. 3%,and the selectivity of 2,4-di-tert-butyl phenol was 57.3%.

关 键 词：精细化学工程 磷钨酸 硅烷偶联剂 SBA-15分子筛 叔丁基苯酚 

分 类 号：O643.36[理学—物理化学] TQ243.1+2[理学—化学]