Dawson型磷钨酸钕催化剂的制备及其催化合成己二酸  

Preparation of NdH_3P_2W_(18)O_(62)·nH_2O and Its Catalytic Performance for Synthesis of Adipic Acid

作　　者：曹小华[1] 陶春元[1] 徐常龙[1] 雷艳虹[1] 周德志[1] 

机构地区：[1]九江学院化学与环境工程学院,江西九江332005

出　　处：《稀土》2016年第2期31-37,共7页Chinese Rare Earths

基　　金：国家自然科学基金项目(21161009);江西省自然科学基金项目(20132BAB203004;20122BAB213001);江西省教育厅科技项目(GJJ13723);九江学院科技项目(2013KJ005)

摘　　要：利用复分解法制备出Dawson型磷钨酸钕NdH_3P_2W_(18)O_(62)·nH_2O,并通过FTIR、UV-Vis、SEM、XRD、EDS、CV对催化剂进行表征。以H2O2为催化剂,30%H_2O_2为氧源,催化氧化环己酮合成了己二酸。考察了催化剂用量、H_2O_2用量、反应时间及催化剂重复套用次数等因素对己二酸收率的影响。结果表明,在优化反应条件下:即w(催化剂)=6.4%(基于环己酮质量),n(环己酮)∶n(30%H_2O_2)=100∶450,105℃反应5.0 h,己二酸收率为91.1%。催化剂套用5次,己二酸收率仍可达67.5%。Neodymium salts of Dawson- type tunstophosphoric acids（ NdH3P2W（18）O（62）·nH2O） were prepared by the double decomposition reaction. FTIR,UV- Vis,SEM,XRD,EDS and CV were used to characterize the catalysts. The catalysts were used to catalyze the synthesis of adipic acid from cyclohexanone oxidized by 30% hydrogen peroxide. The effects of various factors such as catalyst and hydrogen peroxide dosage,reaction time and reusability of the catalyst were investigated.The results indicated that under the optimal reaction conditions,i. e.,w（ NdH3P2W（18）O（62）·nH2O） = 6. 4%（ based on the mass of cyclohexanone）,n（ cyclohexanone） ∶ n（30% H2O2） = 100∶ 450,reaction time of 5. 0 h and reaction temperature of105 ℃,average yield of adipic acid reached 91. 1%. The yield of adipic acid was still above 67. 5% as the catalyst system was reused 5 times.

关 键 词：DAWSON型 磷钨酸钕 己二酸 催化氧化 环己酮 

分 类 号：O614.335[理学—无机化学]