正丁醇作溶剂顺酐在Cu-Zn-Ti催化剂上气相加氢制取四氢呋喃  

Gas Phase Hydrogenation of Maleic Anhydride to Tetrahydrofuran in the Presence of n-Butanol

作　　者：张瑞超[1] 殷恒波[1] 沈玉堂[1] 姜廷顺[1] 

机构地区：[1]江苏大学化学化工学院,镇江212013

出　　处：《应用化学》2007年第11期1304-1309,共6页Chinese Journal of Applied Chemistry

基　　金：江苏省教育厅自然科学基金(O4KJD130040);镇江市工业科技攻关项目(GY2006017)资助

摘　　要：采用共沉淀法制备Cu-Zn-Ti系列催化剂。利用X射线衍射（XRD）、X射线光电子能谱（XPS）、程序升温还原（TPR）、N2吸附等测试技术对催化剂进行了表征。在反应压力1MPa，反应温度235～280℃的条件下，进行顺酐气相加氢活性测试。顺酐转化率高于96％，四氢呋喃选择性高达92．7％。同时正丁醇发生脱氢-歧化-酯化反应，可提供顺酐加氢耗氢量15％～40％的H2气。受到ZnO和TiO2协同作用影响的Cu^0还原后生成的Cu^0具有较高的顺酐深度气相加氢活性。Cu-Zn-Ti系列催化剂的深度加氢能力基本上随Cu^0晶格畸变率的升高而增强．Cu-Zn-Ti catalysts were prepared by means of coprecipitation method. The catalysts were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, temperature programmed reduction, and N2 adsorption. The catalytic performance of the Cu-Zn-Ti catalysts for the gas phase hydrogenation of maleic anhydride in the presence of n-butanol was studied at 235 - 280 ℃ and 1 MPa. The conversion of maleic anhydride was more than 96% and the selectivity of tetrahydrofuran was up to 92. 7%. At the same time, n-butanol was converted to hydrogen and butyl butyrate via dehydrogenation, disproportionation, and esterfication. There were two kinds of CuO species present in the calcined Cu-Zn-Ti catalysts. At a lower copper content, the CuO interacted with ZnO and TiO2; at a higher copper content, both the surface-anchored and bulk CuO species were present. Metallic copper（ Cu^0） produced by the reduction of the CuO species, which strongly interacted with ZnO and TiO2, favored the deep hydrogenation of maleic anhydride. The deep hydrogenation ability of the Cu-Zn-Ti catalyst increased with the increase of lattice distortion of Cu^0.

关 键 词：顺酐 正丁醇 加氢 四氢呋喃 Cu-Zn-Ti 

分 类 号：O643[理学—物理化学]